So you saved me $3,000 dollars my transmission was getting hot advising me to pull over and let transmission cool off because it was to hot I went to my local transmission shop described the issue I was having they advised me my transmission was gone and I could spent as much as i wanted on trying to fix the problem but I would have to replace my transmission I kept driving it trying to make it last as long as I could because I couldn't afford replacing it at this time well it happened my transmission shut down on me and I had to have my truck towed home and left it sitting for a month then I came across your video did exactly what you said and I am now driving my truck around like nothing happened thanks very very much I know I saved 3 grand but you can't have it lol thanks again
Question on the order of parts going back in…it looks like the top came out after removing the snap ring, then you had the pill, then the spring. When you put everything back you put the pill in opposite of the way it came out, and then the spring, even though the spring was on the bottom. Just making sure the spring should go from being at the bottom to being on top of the pill going back in. Thanks for your videos man, they have all been a huge help for me doing work on my truck. Keep it up brother!
Why "flip the pill" when you can replace it? GM issued a TSB for this: 21-NA-199 and part #86774933 new thermostat opens at 158 degrees, useful in all climates. Part is $50.
Also from NWA but have since moved. Your channel has been great! I’ve got a 2015 Sierra and always watch your videos when I need to do something and you’ve taught me a lot about my truck. Not a mechanic by any means but I’ve gained some confidence since watching
Just did mine, about to give it a try. Wish me luck. Update: Travelled south down Hwy 101 through the mountains with about 1200 pounds in the back. Never even got to 160. Love it. Thank you. FYI : 2018 GMC Sierra 1500. 5.3L
Just flipped mine, to extend the life of my new transmission. Went from 190-205 down to the 160s being the highest I've seen so far. Pretty awesome little hack! Thanks!
I put the Superior Solutions bypass in mine a few months back. I went from 194ish to 130-150. The truck shifts a lot better too. It was very easy, and I had the two bolt configuration, took all of 15 minutes to swap it out. Great video!
Was your transmission shifting hard? My transmission shifts so hard it feels like someone rear ended me. Am wanting to put this on my truck to see if it solves the problem as well as keep temp low
I never understood why people spend money on the superior solutions kit when you can do this mod for free and get literally the same exact results. For the people who think that the hotter temps help with mpg’s, I have a 2.5” leveling kit and 33s and managed 21.7 mpg over a 400 mile average while the transmission ran at about 125 degrees the whole time. Shifts like butter too. GM never put thermostats on these transmissions before (this is literally a carryover trans from the last gen, just with the thermostat installed) and had FAR less failures on them. I don’t think it’s a coincidence.
@@carbonsteelbladetheorigina7993 take the housing apart, flip the thermostat and drop it in. Put the spring on the “butt” of the thermostat and then the housing over that. Button it up and enjoy a much cooler transmission.
Trying to increase my MPG on my 2016 GMC Sierra z71... what all have you done to help with it? I have a 3" lift/leveling kit on 275/65-20's... nothing else. At 70mph, I get about 17.5-18 mpg, but know others running similar setups seeing 20+. Help me get on y'all's level!!
@@michaelfutch7551 33s, catch can, range afm disabler, flipped thermostat and flowmaster muffler. Some factors to take into account are changing elevation, type of tire, different bumper, height of the vehicle, added weight, cruise control use, gearing, tune, winter vs summer grade fuel, maintenance, tire pressure, etc. These trucks are direct injection, so carbon buildup on the intake valves hurts performance as well. With your setup, that’s actually pretty decent mpg.
A thorough Fluid change and flushings HELPS the high temp issues. Make sure you put the right amount of fluids to prevent the slippage, hard shifting issues. when I say the right amount, i mean the right amount. Measuring and remeasuring after you put in the fluids. DIYers are notorious in making task quicker Just because you put in 6liters doesnt mean you dont check with your dipstick. These trucks are fucking sensitive. And when checking fluid levels, eye balling is never recommended. Make sure truck is at level position. Run the engine until your at HOT range temp recommendation 150-190 degrees. Shift to all gears, R, D, L1 back to Park. And now, check your dipstick. Fluid marks should be on the “hot” markings. No more, no less.
I agree. You have to follow the procedure when checking fluid . As far as regular change intervals helping with temp, I’m sure that’s true … but that wasn’t the only issue going on with 6l80. You can do everything right and they still failed prematurely. Personally I feel the change intervals should be more like 30 rather than 50k. Just my opinion. I cooked one at 125 but it was really cooked by 120. Couldn’t save it …. But I tell you what , I flipped the pill….. ain’t worth chancing it. A tranny swap cost me 5300…. Couldn’t get jasper or anything like that due to Covid supply chain issues . So had to go with a dealer reman and they did not give me a core charge …..
transmission. Was having very hard downshifts and just ooor shifting mpg all together. I tried everything. I saw your comment and figured I’d check the level. Sure as shit there was too much fluid. I took out about a half quart and the thing shifts like a brand new truck. Mpg is great too. So my only questions is , when you say hot markings, do you mean the beginning of the hash marks. Or middle of the whole marking. Cause right now mine is sitting in the middle of the word HOT. Wondering if I should take out a little more ?
I don't know my transmission runs 110 degrees on my 1994 Silverado 350 4L60E...never had a problem with heat...just takes a long time for overdrive to kick in due too cool of transmission and fluid barely expanding
I just bought a 2014 GMC Sierra 5.3l V8 and I’m certain this hasn’t been done. I only have 105k miles on this truck but thinking I should do this. Do you recommend ordering a new thermostat or flipping this one? If replacing, which part do you recommend replace it with? Thank you.
With 105k you may want to consider replacing the torque converter (I've seen recommendations to replace the L680 TC with a 6L90 TC) before it disintegrates and blows through the gear box. My 2015 Sierra 5.3 w/ 6L80 did just that at 138k. $6,000 later I have another GM rebuilt 6L80 transmission now with 40k on it, and don't plan on letting GM shove their hand in my pocket for another 6k which is why, like you, I'm looking for preventative solutions like cooler thermostats and bypasses. Just my .02 Good Luck!
I just did mine the old school way and ran a trans cooler in the front I think it’s a 30 core and my trans stays at 145 all the time delete the thermostat all together. I also have a thermostat on the cool for a trans fan cool it’s a 165 degree and it has never came on even after drag racing it stays at 145
Did you do this mod ? I too am in Upstate NY and just did this mod . Already dropped to 144 from 195 . I’m sure a small amount of warm up will be needed as usual with winter temps .
Did your motor start running hotter? According to my calculations the heat has to go somewhere. I’m pretty sure the coolant is not being controlled properly now. I would rather do a transmission cooler, it’s like $200.00 and give your trans it’s own radiator.
According to your calculations 🧐 trucks have had coolers in the radiators for 50 years they just recently started putting a thermostat to control the flow of that fluid are you kidding me why would the engine run any hotter? 🤔
Just did mine at 67k. Shoulda done it at 45 when i first bought it. Did i wait too long? Didn't have quick connect links had a cover locking plate with a screw
Just did the pill flip and I went from 195F around town to the lowest of 144 F after the same 30 to 40 minute drive . The trans was warm from a recent trip to town this morning so when I started the road test out it was at 163F and dropped from there to 144 F huge improvement. Transmission service is next just because and I also have no idea when the service was last done . The dealer changed the oil and checked everything else out but didn’t mention a trans service.
Awesome video man. My truck overheated the tranny a few times in the hot summer and then not for a while as its much cooler now that its winter...last night the stupid truck went into limp mode and i could only drive in reverse...i let it idle and got abkut 3 miles in distance over 3 hours and wastkng gas and engine life doing what the stupid system says to...the dumb computer didnt even recognIze the fans that were struggling to start spinning. They would try to turn but wouldnt. Then turn once quick and shut off. idling the engine like the dic said was the wrong thing to do.
I did this last night after seeing this. I've had my transmission replaced at 90k (warranty thankfully) I've always wondered why these trucks run so hot for no reason. This diy was an absolute nightmare for me! I knew what I was getting into when I saw the corrosion (northeast) Still I went ahead. I left a heat gun on the c clip for 40 min and it popped out with some rubber mallet encouragement. Was still worth it. Went from 200-205 average temp to transmission 140 engine 195. The seal near the C clip kept leaking. Had to Uninstall and install 3 to 4 times. I eventually put a large o ring on and slammed the piece in with a rubber mallet. Its now a time capsule. Worth every minute. If you have corrosion be ready and have a new seal/oring ready and some sandpaper. Thanks for the content. I should have done this sooner. These trucks are great minus all the weird issues.
I assume that you DIY your fluids services. What I’ve learned, INACCURATE fluid measurements does creates lots of these problems or annoying engine noises. From slippage, clunking, high trans temperatures, vibrations, and worst case scenario transmission complete breakdown.
@@marlonespenilla5839 all services up until the transmission/converter failure were conducted by the dealer. Once the new transmission was installed it still ran at 200 degrees. This is strictly due to the thermostat. The transmission runs cooler now and I DIY all my fluids. 👍
@@polymath4fun yep, theses trans should NEVER be that hot. My ‘03 2500 with 4L80 runs 135-140. About 252k miles shifts like new, I change fluid/filter every 5 oil changes or 20k
To late for me. Mine failed and that cost me $6,200. Thermostat got stuck closed. No warning lights or temp warnings. However, the electric fan did come on. I thought that was a stuck fan relay. Didn't notice I had a transmission problem until it gave me symptoms. Was 200 miles from home. It got back home, but it was fried. That was an unnecessary failure.
Amen. Great video with all the basic information needed that doesn't leave out footage of important steps like some other youtubers. (i.e. "you're gonna take this off", cut to shot of the part off and completely disassembled) But, please take the extra 30 seconds to do it right, especially when making videos for TH-cam. Some viewers don't know which end of a hammer to hold and will take this verbatim. It will take half a minute or less to hit the top of that thermostat plug with some parts cleaner and a rag before popping the snap ring off. All that dirt got pushed into the housing when when the plug was reinstalled and since that housing is after the filter it ran through the cooler before being dumped into the pan. Depending on the style of cooler, it might not take much to plug a pathway or two.
Hope you replaced the stock torque converter with one that has a billet base. The stock converters are the reason these trannys fail. Keeping cooler will help also.
Bad idea. It beats the hell out of the bottom of the thermostat housing. And you can install the small e clips back onto the housing before you put the lines back in. The lines will click right in.
Did this and my transmission went out lol but it wasn’t from this my torque converter took a shit and the components from the torque converter clogged the filter from the transmission and now it only has first and second gear
This is great thanks for sharing. I'm in the pocono mountains of Pennsylvania 17 Silverado 50k I've noticed some hard shifts at slow speeds. I just figured out how to monitor the fluid temp.🤦♂️ Forty degree day today I'll have to keep an eye on the temperature. 190+ is too much
Ive got a 2014 1500 silverado 5.3 6 speed its been running at 194 degrees has annyone tried this yet on this specific model? Kinda skeptical on if this actually works
Said your transmission. Needs serviced. No it needed to cool down. It needs to be engineered and tested properly. You dont build a rifle and not test it numerous times just in case it might blow up in someones face. That limp mode bs almost got me hit by a bunch of vehicles speeding toward my flashing 4 lights. The dum fs are sooo dumb that they still drive right up behind you and sit there for 5 minutes until you tell them how low their i q is.... damn highway 7 is full of accident prone drivers and 5 lane crossovers. Now gmc should be replacing all of these stupid valves for everyone.
I did this mod 1,000 miles ago.used to run at 194.since I've done this mod I haven't seen over 138 so far.truck is a 2016 and has 74,000 miles on it and wanted to prolong the life of the trans as much as possible.also changed the trans fluid and filter and added a drain plug to the trans pan.gonna change the fluid pretty regular.
2015 6.2 LTZ 4X4 , I'm going to try this also I have a question. My truck started making the classic u joint sound. I replaced all u joints (they were all good ) went ahead and replaced them anyway. It's still making the noise. It speeds up and slowes down with speed of the truck. Could my front axle joint do that , they seem tight. Any ideas would be helpful. Like your trans temp mod , it's on my list soon as I figure out the current problem. Thanks. Subbed.👍👍🏁🏁
You might need alignment, worn out uneven tire threads can cause such weird vibrations. Check rear suspensions, all bolts and nuts. If your truck is lifted, even more bolts and nuts to recheck and retorque.
I was wondering the same thing.. just take out the spring and "pill" or plunger.. DONE.. lol Have you heard anything new about it? (I've got a busted knee, having surgery AGAIN this Monday.. YIKES..lol) but I think I want to get this done asap. I already paid the $4200 for a new torque converter and Reman transmission, two years ago.. don't want to have to do that again.. lol (just as I clicked "save".. I just figured out why..) You have to put it back in because the spring and the pill keeps pressure on the outer plug keeping it sealed. So, if the internals aren't in there.. it'll leak like a stuck pig.. my thoughts, anyway.. lol
Hey. First off, thanks for these informative videos. So one week ago my wife and I bought an 18 Sierra SLT with 33,000. It’s a one owner vehicle in great shape. I took out a 100k warranty. Due to major back issues, I can no longer turn a wrench. So if I wanted this done, where would I take it? Also, any idea of this voiding the warranty? Finally, I was told to change the fluid (drop pan, no flush) at 40,000. Does that make sense? TIA
Hope you're looking at your comments Dustin. Slid under my 2016 GMC Sierra 2500HD this afternoon to see what I had to do to complete this swap out. What I found was not the block like you and others show, but a much smaller block that looks to have no thermostat in it. It looks to me to just be a plate holding the lines in. Have you seen or heard of anyone having that? Wish I could post a pic.
Sounds like service got to yours before you had problems. Chevy started fixing this issue with any service. Silently. Even the CCND inspections have an add-in to replace the thermostat on any truck still under warranty. They want the tranny's to last just until warranty is out and the torque converter falls apart from excessive cycles in 194° tranny fluid.
Absolutely should swap it out the bypass. My 2019 LT Trailboss was running 230-270 and when I took it to the dealer they told me my transmission has blown so yeah buddy either your transmission is already done for or you need to do something about it ASAP before you get hit with a crazy bill
Did the GMC trans mod replacement swap out for $70.00 .. Went from 190*+ to 150*ish .. From what I have come to understand trans fluid runs best at 175* ... Be aware that a total by-pass will not work well for your truck in cooler temps and people make lots of claims just to sound important ... Do your research !
@@tyfannon1704 *** I live in ENC where it can get very hot and sometimes cold ... Bought it through an online GM OEM sight ... Easy install and works great at keeping my trans temp below 175* .. Make sure you have all the info so you get the right GMC Mod for your Truck installation ... Good luck ...
Hey man, did the same thing and my tranny topped at 165 too. Was wondering if that’s still a good temp? Does the orientation of the top piece below the snap ring have any effect? That part with the half moon looking thing.
Hey Anthony, in it's current configuration, the transmission fluid is coming into the thermostat from the "spring" side. aka the furthest port while looking into the cylinder. The spring holds the plunger "towards your eyes" looking into the cylinder hence sealing off the flow. When you swap their respective positions, the spring keeps the plunger from contacting the "shut off" position. I know this "fix" seems counter intuitive but by swapping their positions, it'll always allow some passage for the fluid to bypass no matter what the current fluid temperature. In essence, the plunger will be forced by the spring to be inserted into the oncoming stream of fluid but only by a slight margin. Hope this helps..
Check to make sure you didn't lose or damage one of the O-rings on the transmission lines, sometimes the O-rings stay stuck in the thermostat housing and fall out without being noticed.
It can’t be leaking everywhere it can only be leaking around the thermostat so pull the thermostat back off clean your lines reinstall if it’s still leaking take it any mechanic they’ll fix it for less than 50 bucks
@@moxxy5411 I think Chevy engineers don’t want the transmission to run on law temperature for long time. I agree also high temperatures above 200 is not good. You will need to find out why the temperature goes up. Mine had problems with the transmission on the second gear. I found filings in the pan. I cleaned the pan and put new transmission filter and fluid (OEM parts) by my self and has been running very well. I know the transmission will die someday because many transmission workshop told me suburbans with 6 gears (5.3 engine) have transmission defects. I will buy a suburban with 8 gears (6.2 engine). Keep me updated.
@@mufali7283 thanks so much for the information. I will get the transmission fluid changed as well as the filter and pan cleaned because I just bought the car used so when I’m slowing down to a stop sign or something the car hesitated when downshifting so I don’t know what that could be but I’m hoping changing fluid fixes it
@@moxxy5411 yes, that is a good idea to start with. Hopefully that will fix the problem. When you first start driving it, does it take longer time to shift to the second gear? Is the car 5.3? What year?
I live in western NY and have a 2014 Silverado 1500 LTZ, 5.3, with 94,000 miles. Our temperatures range from -20's in winter to triple digits in summer. I can see my trans temp on the DIC, but have absolutely no idea what a safe maximum operating temp is. Can someone help me out, please?
You have other issues if it's that high. Either diagnosis of the transmission is needed for slipping or something inside is cooked. You can add an external cooler if the guts are ok.
Its because the wires to the break controller under the carpet. Unwind the wires that are twisted together. You may have to do all or 1. As the wires are put together frome the factory, they get little cuts from the machine that makes them. So the wires start touching. After I did that took the pressure off the breaks. Better mpg less break problems. And the frunt stopped dipping in the front going down the road. Look at other trucks and cars and you will see them do it.
we are working on a video for that. flip the pellet and watch the unit smoke when you kink the cooler line. why plug it off, use it to your advantage as a safety bypass.
@@fanohawk but if you NEED the device to kick in and save a transmission...oh wait you just plugged that. my bad... to bad you didn't watch the superior video.
@@rleeallison Oh,,, thanks didnt know that. I have a mishamoto (whatever they are called) cooler on my seirra, and it still reaches 200 or more. But I also have a 2800 stall converter. I dont think its right though to still run that hot.
So you saved me $3,000 dollars my transmission was getting hot advising me to pull over and let transmission cool off because it was to hot I went to my local transmission shop described the issue I was having they advised me my transmission was gone and I could spent as much as i wanted on trying to fix the problem but I would have to replace my transmission I kept driving it trying to make it last as long as I could because I couldn't afford replacing it at this time well it happened my transmission shut down on me and I had to have my truck towed home and left it sitting for a month then I came across your video did exactly what you said and I am now driving my truck around like nothing happened thanks very very much I know I saved 3 grand but you can't have it lol thanks again
Question on the order of parts going back in…it looks like the top came out after removing the snap ring, then you had the pill, then the spring. When you put everything back you put the pill in opposite of the way it came out, and then the spring, even though the spring was on the bottom. Just making sure the spring should go from being at the bottom to being on top of the pill going back in. Thanks for your videos man, they have all been a huge help for me doing work on my truck. Keep it up brother!
Excellent video. Focuses on the problem and the fix rather than the presenter and a long boring preamble. Thanks.
Why "flip the pill" when you can replace it? GM issued a TSB for this: 21-NA-199 and part #86774933 new thermostat opens at 158 degrees, useful in all climates. Part is $50.
Thanks
Also from NWA but have since moved. Your channel has been great! I’ve got a 2015 Sierra and always watch your videos when I need to do something and you’ve taught me a lot about my truck. Not a mechanic by any means but I’ve gained some confidence since watching
Just did mine, about to give it a try. Wish me luck.
Update: Travelled south down Hwy 101 through the mountains with about 1200 pounds in the back. Never even got to 160. Love it. Thank you.
FYI : 2018 GMC Sierra 1500. 5.3L
Just flipped mine, to extend the life of my new transmission. Went from 190-205 down to the 160s being the highest I've seen so far. Pretty awesome little hack! Thanks!
I have a 2019 suburban and I decided to try this mod, and it sure as hell works. I went from about 195-215 all the way down to 150's.
I put the Superior Solutions bypass in mine a few months back. I went from 194ish to 130-150. The truck shifts a lot better too. It was very easy, and I had the two bolt configuration, took all of 15 minutes to swap it out. Great video!
Brian for the WIN! wait till someone sues him for destroying their transmission.... LOLOL!
Was your transmission shifting hard?
My transmission shifts so hard it feels like someone rear ended me. Am wanting to put this on my truck to see if it solves the problem as well as keep temp low
@@Stop_the_cap311 it helped with the hard shifts, but a fluid change really helped after I did the thermostat delete.
@@Stop_the_cap311 🤣🤣🤣lmfao
Is this any better than the actual OEM new part? Is there any advantage to buying the new part?
I am really glad I found your video I am going to try this because my truck is a 2018 thank you very much I appreciate the knowledge and the how to.
I never understood why people spend money on the superior solutions kit when you can do this mod for free and get literally the same exact results. For the people who think that the hotter temps help with mpg’s, I have a 2.5” leveling kit and 33s and managed 21.7 mpg over a 400 mile average while the transmission ran at about 125 degrees the whole time. Shifts like butter too. GM never put thermostats on these transmissions before (this is literally a carryover trans from the last gen, just with the thermostat installed) and had FAR less failures on them. I don’t think it’s a coincidence.
How do I do it for free?
@@carbonsteelbladetheorigina7993 take the housing apart, flip the thermostat and drop it in. Put the spring on the “butt” of the thermostat and then the housing over that. Button it up and enjoy a much cooler transmission.
@@Timmytheman87 thanks a bunch.
Trying to increase my MPG on my 2016 GMC Sierra z71... what all have you done to help with it? I have a 3" lift/leveling kit on 275/65-20's... nothing else. At 70mph, I get about 17.5-18 mpg, but know others running similar setups seeing 20+. Help me get on y'all's level!!
@@michaelfutch7551 33s, catch can, range afm disabler, flipped thermostat and flowmaster muffler. Some factors to take into account are changing elevation, type of tire, different bumper, height of the vehicle, added weight, cruise control use, gearing, tune, winter vs summer grade fuel, maintenance, tire pressure, etc. These trucks are direct injection, so carbon buildup on the intake valves hurts performance as well. With your setup, that’s actually pretty decent mpg.
A thorough Fluid change and flushings HELPS the high temp issues. Make sure you put the right amount of fluids to prevent the slippage, hard shifting issues. when I say the right amount, i mean the right amount. Measuring and remeasuring after you put in the fluids. DIYers are notorious in making task quicker Just because you put in 6liters doesnt mean you dont check with your dipstick. These trucks are fucking sensitive. And when checking fluid levels, eye balling is never recommended. Make sure truck is at level position. Run the engine until your at HOT range temp recommendation 150-190 degrees. Shift to all gears, R, D, L1 back to Park. And now, check your dipstick. Fluid marks should be on the “hot” markings. No more, no less.
I agree. You have to follow the procedure when checking fluid . As far as regular change intervals helping with temp, I’m sure that’s true … but that wasn’t the only issue going on with 6l80. You can do everything right and they still failed prematurely. Personally I feel the change intervals should be more like 30 rather than 50k. Just my opinion. I cooked one at 125 but it was really cooked by 120. Couldn’t save it …. But I tell you what , I flipped the pill….. ain’t worth chancing it. A tranny swap cost me 5300…. Couldn’t get jasper or anything like that due to Covid supply chain issues . So had to go with a dealer reman and they did not give me a core charge …..
transmission. Was having very hard downshifts and just ooor shifting mpg all together. I tried everything. I saw your comment and figured I’d check the level. Sure as shit there was too much fluid. I took out about a half quart and the thing shifts like a brand new truck. Mpg is great too. So my only questions is , when you say hot markings, do you mean the beginning of the hash marks. Or middle of the whole marking. Cause right now mine is sitting in the middle of the word HOT. Wondering if I should take out a little more ?
@@brennanbaker2436 how did you get it out? Through the dip stick hole .
I don't know my transmission runs 110 degrees on my 1994 Silverado 350 4L60E...never had a problem with heat...just takes a long time for overdrive to kick in due too cool of transmission and fluid barely expanding
I just bought a 2014 GMC Sierra 5.3l V8 and I’m certain this hasn’t been done. I only have 105k miles on this truck but thinking I should do this. Do you recommend ordering a new thermostat or flipping this one? If replacing, which part do you recommend replace it with? Thank you.
Flip that bitch.. I’m getting ready to do that soon looking for some one to do it though
With 105k you may want to consider replacing the torque converter (I've seen recommendations to replace the L680 TC with a 6L90 TC) before it disintegrates and blows through the gear box. My 2015 Sierra 5.3 w/ 6L80 did just that at 138k. $6,000 later I have another GM rebuilt 6L80 transmission now with 40k on it, and don't plan on letting GM shove their hand in my pocket for another 6k which is why, like you, I'm looking for preventative solutions like cooler thermostats and bypasses. Just my .02 Good Luck!
I just did mine the old school way and ran a trans cooler in the front I think it’s a 30 core and my trans stays at 145 all the time delete the thermostat all together. I also have a thermostat on the cool for a trans fan cool it’s a 165 degree and it has never came on even after drag racing it stays at 145
Couldn't you just remove the valve completely and connect the tubes together with high heat hose and hose clamps and achieve the same result?
Any cold weather issues with this mod?? Live in upstate NY and have lots of teens to twenty degrees weather….
Did you do this mod ? I too am in Upstate NY and just did this mod . Already dropped to 144 from 195 . I’m sure a small amount of warm up will be needed as usual with winter temps .
This applies to 2021 Silverado 6
Speed transmission A must do
Where is the red pill indidnt even see a blue pill funky matrix is glitching again
Did your motor start running hotter? According to my calculations the heat has to go somewhere. I’m pretty sure the coolant is not being controlled properly now. I would rather do a transmission cooler, it’s like $200.00 and give your trans it’s own radiator.
According to your calculations 🧐 trucks have had coolers in the radiators for 50 years they just recently started putting a thermostat to control the flow of that fluid are you kidding me why would the engine run any hotter? 🤔
Wait so does that make the transmission cooler or does it simply fool the thermostat into thinking that it is cooler?
I have a 2012 silverado with a 6l80 transmission, will this work for it?
I just did this and the difference is minimal, what I'm I doing wrong?
Did this to my 2015. Now never gets over 150 on the highway. Dead easy to do. Don't know why anyone would ever buy a bypass kit. Just flip the pill.
Just did mine at 67k. Shoulda done it at 45 when i first bought it. Did i wait too long? Didn't have quick connect links had a cover locking plate with a screw
im definitely going to have tk try this on my 2018 Silverado
Just did the pill flip and I went from 195F around town to the lowest of 144 F after the same 30 to 40 minute drive . The trans was warm from a recent trip to town this morning so when I started the road test out it was at 163F and dropped from there to 144 F huge improvement. Transmission service is next just because and I also have no idea when the service was last done . The dealer changed the oil and checked everything else out but didn’t mention a trans service.
Awesome video man. My truck overheated the tranny a few times in the hot summer and then not for a while as its much cooler now that its winter...last night the stupid truck went into limp mode and i could only drive in reverse...i let it idle and got abkut 3 miles in distance over 3 hours and wastkng gas and engine life doing what the stupid system says to...the dumb computer didnt even recognIze the fans that were struggling to start spinning. They would try to turn but wouldnt. Then turn once quick and shut off. idling the engine like the dic said was the wrong thing to do.
Free is the best price!! Bitchin mod!! Great video!!
I did this last night after seeing this. I've had my transmission replaced at 90k (warranty thankfully) I've always wondered why these trucks run so hot for no reason. This diy was an absolute nightmare for me! I knew what I was getting into when I saw the corrosion (northeast) Still I went ahead. I left a heat gun on the c clip for 40 min and it popped out with some rubber mallet encouragement. Was still worth it. Went from 200-205 average temp to transmission 140 engine 195. The seal near the C clip kept leaking. Had to Uninstall and install 3 to 4 times. I eventually put a large o ring on and slammed the piece in with a rubber mallet. Its now a time capsule. Worth every minute. If you have corrosion be ready and have a new seal/oring ready and some sandpaper. Thanks for the content. I should have done this sooner. These trucks are great minus all the weird issues.
I assume that you DIY your fluids services. What I’ve learned, INACCURATE fluid measurements does creates lots of these problems or annoying engine noises. From slippage, clunking, high trans temperatures, vibrations, and worst case scenario transmission complete breakdown.
@@marlonespenilla5839 all services up until the transmission/converter failure were conducted by the dealer. Once the new transmission was installed it still ran at 200 degrees. This is strictly due to the thermostat. The transmission runs cooler now and I DIY all my fluids. 👍
@@polymath4fun yep, theses trans should NEVER be that hot. My ‘03 2500 with 4L80 runs 135-140. About 252k miles shifts like new, I change fluid/filter every 5 oil changes or 20k
Fu**in junk
To late for me. Mine failed and that cost me $6,200. Thermostat got stuck closed.
No warning lights or temp warnings. However, the electric fan did come on. I thought that was a stuck fan relay. Didn't notice I had a transmission problem until it gave me symptoms. Was 200 miles from home. It got back home, but it was fried. That was an unnecessary failure.
Man you are really nice man...put please be clean and easy..u are like a viking fixing his 🪓
Amen. Great video with all the basic information needed that doesn't leave out footage of important steps like some other youtubers. (i.e. "you're gonna take this off", cut to shot of the part off and completely disassembled)
But, please take the extra 30 seconds to do it right, especially when making videos for TH-cam. Some viewers don't know which end of a hammer to hold and will take this verbatim.
It will take half a minute or less to hit the top of that thermostat plug with some parts cleaner and a rag before popping the snap ring off. All that dirt got pushed into the housing when when the plug was reinstalled and since that housing is after the filter it ran through the cooler before being dumped into the pan. Depending on the style of cooler, it might not take much to plug a pathway or two.
Aye I heard NWA! Bella Vista/Bentonville native here ✌️
My 6l80 still doesn’t run cool enough. I did the bypass and mine still runs around 150-160 average. My other truck with the 6l80 runs 130 on average
I bought the sure cool w/active bypass,for my 18 1500
AMEN BROTHER
How do you like your transmission?
Well cooked
I did the trans thermostat by superior solutions part #STL010 and it works.Drops your temps by 40 -60 degrees.
Just flipped mine when I put a new trans in I went from 180 to 115
Hope you replaced the stock torque converter with one that has a billet base. The stock converters are the reason these trannys fail. Keeping cooler will help also.
Should also clean all the dirt off before you remove snap ring. Then Also after you remove cage.
Good catch, I should have done that and would if I had to do this again. Don’t want any foreign material making it’s way into the transmission!
Bad idea. It beats the hell out of the bottom of the thermostat housing. And you can install the small e clips back onto the housing before you put the lines back in. The lines will click right in.
Did this and my transmission went out lol but it wasn’t from this my torque converter took a shit and the components from the torque converter clogged the filter from the transmission and now it only has first and second gear
Since I live in texas where it’s 80 degrees in December and only winter for 3 months ima have to do this mid respectfully.
Mod*
This is great thanks for sharing. I'm in the pocono mountains of Pennsylvania 17 Silverado 50k I've noticed some hard shifts at slow speeds. I just figured out how to monitor the fluid temp.🤦♂️ Forty degree day today I'll have to keep an eye on the temperature. 190+ is too much
How do you monitor it
Took me 10 mins to change mine 2017 8l90 it was running 160 degrees now it’s like 111 no higher than 120
Just went through the fluttering torque converter/coolant valve issue here in Alaska. They get that hot.
Ive got a 2014 1500 silverado 5.3 6 speed its been running at 194 degrees has annyone tried this yet on this specific model? Kinda skeptical on if this actually works
Doing this made it worse
Said your transmission. Needs serviced. No it needed to cool down. It needs to be engineered and tested properly. You dont build a rifle and not test it numerous times just in case it might blow up in someones face. That limp mode bs almost got me hit by a bunch of vehicles speeding toward my flashing 4 lights. The dum fs are sooo dumb that they still drive right up behind you and sit there for 5 minutes until you tell them how low their i q is.... damn highway 7 is full of accident prone drivers and 5 lane crossovers. Now gmc should be replacing all of these stupid valves for everyone.
Theres no almost kinda click it needs to 90 percent of connections will give off a confirmation click
I did this mod 1,000 miles ago.used to run at 194.since I've done this mod I haven't seen over 138 so far.truck is a 2016 and has 74,000 miles on it and wanted to prolong the life of the trans as much as possible.also changed the trans fluid and filter and added a drain plug to the trans pan.gonna change the fluid pretty regular.
How did you add a plug?
@@tlwayman I bought a weld in drain plug.
Still staying cool? How has it run
@@Stop_the_cap311 it's been running fine.i haven't seen temps over 158 on 90 degree days.
So does this trick actually work? And is it safe?
Any idea why my temps is still the same after I installed this?
Did you find the problem same thing happened to me
@@juanmurillo9763 I was looking at the wrong temp haha
2015 6.2 LTZ 4X4 , I'm going to try this also I have a question. My truck started making the classic u joint sound. I replaced all u joints (they were all good ) went ahead and replaced them anyway. It's still making the noise. It speeds up and slowes down with speed of the truck. Could my front axle joint do that , they seem tight. Any ideas would be helpful. Like your trans temp mod , it's on my list soon as I figure out the current problem. Thanks. Subbed.👍👍🏁🏁
You might need alignment, worn out uneven tire threads can cause such weird vibrations. Check rear suspensions, all bolts and nuts. If your truck is lifted, even more bolts and nuts to recheck and retorque.
I heard retorque spring ubolts
Why not take the thermostat out completely? Thank you for the video
I was wondering the same thing.. just take out the spring and "pill" or plunger.. DONE.. lol Have you heard anything new about it? (I've got a busted knee, having surgery AGAIN this Monday.. YIKES..lol) but I think I want to get this done asap. I already paid the $4200 for a new torque converter and Reman transmission, two years ago.. don't want to have to do that again.. lol (just as I clicked "save".. I just figured out why..) You have to put it back in because the spring and the pill keeps pressure on the outer plug keeping it sealed. So, if the internals aren't in there.. it'll leak like a stuck pig.. my thoughts, anyway.. lol
He said no flow
Hey. First off, thanks for these informative videos.
So one week ago my wife and I bought an 18 Sierra SLT with 33,000. It’s a one owner vehicle in great shape. I took out a 100k warranty.
Due to major back issues, I can no longer turn a wrench. So if I wanted this done, where would I take it? Also, any idea of this voiding the warranty?
Finally, I was told to change the fluid (drop pan, no flush) at 40,000. Does that make sense? TIA
did u had to refill fluid? have a 8l90 and will have to pump the fluid in
How do you know how hot the Trans is?
I gave a 2017 slt sierra.
I bought the Superior solutions as well, I am hitting about 160 on a good day !
I have a 2018 Chevy Silverado 5.3L 6 speed. Will this work on my truck
Never going to buy another Chevy or GM product ever again! They don't stand behind their products
I’m doing the same thing with my 2014 with stl010
My 2013 transmission temp is 190-ish. Is there a fix for the 6L80s in the 2013?
TIA
Man I'm in the NWA too! I got my truck like a month ago and I'm trying to do my best to keep it in good condition
When my snap rings are that close ill tap it on with a socket around the diagmeter
Hope you're looking at your comments Dustin. Slid under my 2016 GMC Sierra 2500HD this afternoon to see what I had to do to complete this swap out. What I found was not the block like you and others show, but a much smaller block that looks to have no thermostat in it. It looks to me to just be a plate holding the lines in. Have you seen or heard of anyone having that? Wish I could post a pic.
You do not have a thermostat on your truck.
Yep, figured that out @@memoo4077
Sounds like service got to yours before you had problems. Chevy started fixing this issue with any service. Silently. Even the CCND inspections have an add-in to replace the thermostat on any truck still under warranty. They want the tranny's to last just until warranty is out and the torque converter falls apart from excessive cycles in 194° tranny fluid.
Does this affect trans fluid flow at all?
My 2019 suburban is currently at 260... the high temp light came on today... wil this mod help me?
Absolutely should swap it out the bypass. My 2019 LT Trailboss was running 230-270 and when I took it to the dealer they told me my transmission has blown so yeah buddy either your transmission is already done for or you need to do something about it ASAP before you get hit with a crazy bill
Add a derale remote filter inline with it in place of the thernostat
❤❤❤
Should be changing that gasket
Doing this today! Also here in NWA!
That fluid looks dirty.
Did the GMC trans mod replacement swap out for $70.00 .. Went from 190*+ to 150*ish .. From what I have come to understand trans fluid runs best at 175* ... Be aware that a total by-pass will not work well for your truck in cooler temps and people make lots of claims just to sound important ... Do your research !
@@tyfannon1704 *** I live in ENC where it can get very hot and sometimes cold ... Bought it through an online GM OEM sight ... Easy install and works great at keeping my trans temp below 175* .. Make sure you have all the info so you get the right GMC Mod for your Truck installation ... Good luck ...
Hopefully I did this in time.. constantly runs at 190 ... just took it for a test run down the hwy and she topped out at 165!!!!
Hey man, did the same thing and my tranny topped at 165 too. Was wondering if that’s still a good temp? Does the orientation of the top piece below the snap ring have any effect? That part with the half moon looking thing.
@@sergeyandriyuk209 I wondered the same thing man, should have made a note of where things were orientated.
i wonder if this would work here in canada on our winter days?
Very interesting, i didn't know this. Great video. Cheers
Thanks buddy! Soon I’ll show how to swap out the internal to the updated thermostat. That’ll make the trans run at around 150-160 Fahrenheit
where can i buy this part, please order bearings
No problems with my truck
Glad to hear! They are great trucks if you don’t beat on them.
Keep up the good work!
Thanks buddy!
I did flip the valve for the fluid thermostat and dropped down the temperature dramatically.
From 360 Fahrenheit to 176-196
360 Fahrenheit??
360? Boy that’s no longer a transmission lol
What about the updated thermostat that opens at 165?
will still stick.
Before buying that, make sure your cooling lines match up. More than likely you'll need to replace the lines with the new updated part.
Bad idea don't do it
When you flip that tstat what holds the pin in or keep the pin from falling out and ending up in the system ?
what happens when you need the bypass to kick in??? nothing... but the unit melting... Sure~Cool for the win here too...
Hey Anthony, in it's current configuration, the transmission fluid is coming into the thermostat from the "spring" side. aka the furthest port while looking into the cylinder. The spring holds the plunger "towards your eyes" looking into the cylinder hence sealing off the flow. When you swap their respective positions, the spring keeps the plunger from contacting the "shut off" position. I know this "fix" seems counter intuitive but by swapping their positions, it'll always allow some passage for the fluid to bypass no matter what the current fluid temperature. In essence, the plunger will be forced by the spring to be inserted into the oncoming stream of fluid but only by a slight margin. Hope this helps..
How many time do you think that the bypass is necessary for the average daily driver???@@superiortransmissionpartsi5357
@@ericg4x4 anytime, you don't really know until it's too late.
@@sterlingthibodeaux3690do you think I should flip it I live in Texas and have 8 speed
love ur videos man!!!!
Thanks buddy! Been taking a break this winter, I need to start putting out more content
mine is leaking everywhere afterwards and i cannot find the problem and help ?
Double check the lines are pushed in all the way.
Check to make sure you didn't lose or damage one of the O-rings on the transmission lines, sometimes the O-rings stay stuck in the thermostat housing and fall out without being noticed.
It can’t be leaking everywhere it can only be leaking around the thermostat so pull the thermostat back off clean your lines reinstall if it’s still leaking take it any mechanic they’ll fix it for less than 50 bucks
After doing this mod do you have a best way to put on those clips, I’m having a hard time putting them on.
put the clips on before installing the lines, then push the lines in.
Don't bolt it tight till you have the lines on-then finish tightening so you can line up easier.
Thank u good job
I changed mine too because I pull a 34 ft camper, and it works great temp now is 134 -138
Can this be applied to 2018 Chevrolet Suburban? If yes, why did you flip the order of things? Thanks
Did u figure out for 2018 suburban? Have same vehicle
@@moxxy5411 I think Chevy engineers don’t want the transmission to run on law temperature for long time. I agree also high temperatures above 200 is not good. You will need to find out why the temperature goes up. Mine had problems with the transmission on the second gear. I found filings in the pan. I cleaned the pan and put new transmission filter and fluid (OEM parts) by my self and has been running very well. I know the transmission will die someday because many transmission workshop told me suburbans with 6 gears (5.3 engine) have transmission defects. I will buy a suburban with 8 gears (6.2 engine). Keep me updated.
@@mufali7283 thanks so much for the information. I will get the transmission fluid changed as well as the filter and pan cleaned because I just bought the car used so when I’m slowing down to a stop sign or something the car hesitated when downshifting so I don’t know what that could be but I’m hoping changing fluid fixes it
@@moxxy5411 yes, that is a good idea to start with. Hopefully that will fix the problem. When you first start driving it, does it take longer time to shift to the second gear? Is the car 5.3? What year?
@@mufali7283 yea it’s 2017 I haven’t noticed that but sometimes the rpm slightly goes up then comes back down
What should the temp be on a 2013 Z71 4x4 ?
My guess is 190. Probably why there’s a thermostat in there. 😂
I believe the 2013 did not have a thermostat, so I would expect on a warm day around 150 Fahrenheit
@@DustinT 150-180
I live in western NY and have a 2014 Silverado 1500 LTZ, 5.3, with 94,000 miles. Our temperatures range from -20's in winter to triple digits in summer. I can see my trans temp on the DIC, but have absolutely no idea what a safe maximum operating temp is. Can someone help me out, please?
Go Through the steering button. Set info to transmission fluid info and watch the numbers… mines avg at 198
In GA at 32 degrees, temperature on transmission 198 degrees, 85 miles
@@henryaugustin9345 , Thanks, Henry.
I had the Superior Solutions bypass put in mine and it worked for a few weeks. Now after a 65 mile drive home from work it has risen to 201 degrees.
You have other issues if it's that high. Either diagnosis of the transmission is needed for slipping or something inside is cooked. You can add an external cooler if the guts are ok.
Replace transmission filter and flush transmission. When filters start to get clogged transmission gets hot.
Its because the wires to the break controller under the carpet. Unwind the wires that are twisted together. You may have to do all or 1. As the wires are put together frome the factory, they get little cuts from the machine that makes them. So the wires start touching. After I did that took the pressure off the breaks. Better mpg less break problems. And the frunt stopped dipping in the front going down the road. Look at other trucks and cars and you will see them do it.
I wish you showed it working
we are working on a video for that. flip the pellet and watch the unit smoke when you kink the cooler line. why plug it off, use it to your advantage as a safety bypass.
@@superiortransmissionpartsi5357 I bought the kit and my truck still gets up to 180-190 is your part faulty ?
@@jamesholland167 you may need to add an auxiliary cooler in parallel to the trans cooler.
Working on that video, stay tuned
I so much want to buy a used 2017 sierrae or silverado, but with crappy trans and grenading lifters and cams, I guess Toyota for me.
So how does the sensor lower the heat?
Not a sensor it's a thermostat. It's lowers it by not restricting flow after modification.
@@fanohawk but if you NEED the device to kick in and save a transmission...oh wait you just plugged that. my bad... to bad you didn't watch the superior video.
Why not just leave everything out of the housing and let it free flow?
It will free flow from outlet right back to inlet, never going to cooler
@@rleeallison Oh,,, thanks didnt know that. I have a mishamoto (whatever they are called) cooler on my seirra, and it still reaches 200 or more. But I also have a 2800 stall converter. I dont think its right though to still run that hot.