Dear Gary,I'm having problems with my own Astra (Opel/GM) 6T45 transmission. Bought this car with transmission issues (harsh, bumpy shifts and flares) expecting to fix them myself. I've done a few 6t40's/6t45's with the common 'no 3rd, 5th, reverse'. This specific transmission seems to have undergone a rebuild before where they replaced the waveplate from the 3,5,R. But it's a Gen1 trans and there was a Gen2 3,5,R/4,5,6 drum installed, with a 3 ring stator. That didn't seem right so i've changed that with the correct drum and a 4-ring stator. Installed the correct parts such as return spring and piston for 4,5,6. I put the transimission back together and also replaced the solenoids from the TEHCM and the valve body because there was a lot of steel debris in the trans.However, the trans still doesn't shift properly. Especially when the trans is at operating temperature. Shift flares at 3-4 shift, 2-3 shift (sometimes) and 5-6 shift. In general the shift quality is poor. Once in gear there are no slips. The ECU doesn't give any codes.Could it be that the pressure switches are going bad, but not bad enough jet to produce a dtc?? Or do you have another idea of what might be going on??Any help is much appreciated!!
Have you ever figured out the problem with the transmission flare from 2-3 and 3-4. I have the same issue and it only does it after the tranny is warmed up. No codes either. If it has to do with the pressure switches I would probably do that my self I know this is one of the common issues and the reason gen 2 doesn't have them. Lol I want to do the wave plate too but can't bring myself to do that much work now.
Hi Gary I am from South Africa and I have a 2017 Chevrolet Captiva 2.2D with a 6T50 Transmission. About 3 years ago the input shaft broke and I sent it to the local mechanic, and he replaced the input shaft, put the transmission back together and everything was just fine. Last year the input shaft broke again so I took it to the same mechanic he replaced the shaft and the hub but when I got the vehicle back, I noticed that it would shift from 5th to 6th gear but as soon as the vehicle gets the slightest uphill, it will shift back from 6th gear to 5th gear and it will not shift back to 6th gear again. I eventually took the vehicle to the neighbouring town to a so-called gearbox specialist. It is now 10 months later, and they still are not able to fix the transmission yet. They have replaced the Transmission Control module twice; this has not fixed the issue. They then replaced the torque converter but that did not fix the issue. They then sent it to another workshop where the torque converter was replaced again and they also replaced the hydraulic pump, but when they put it back together the issue remained. I would like to know if you would have any advice or guidance on what the problem could be.
@@GaryFerraro Hi, it will not go into 6th gear again either when my foot is steady on the gas or when I'm pressing down to go faster. If you stop the vehicle and switch it off and switch it back on it will shift through to 6th gear but will shift back to 5th and the same pattern will happen.
Wonderful videos on the 6t40 Gary, thanks! I got pulled into this topic because my wife inherited a 2011 Buick regal with a 6T40 transmission, still in beautiful shape, but at 60k it stopped going forward at all, reverse still worked. In drive, car moves a little forward, then stops with engine still revving. We got a check engine light with a P2723/P0700 engine codes. Towed to dealer, and they tried the GM-recommended fix of replacing the computer+solenoid assembly in the transmission - $2500 repair! No help though, and so they said replace the whole transmission for $5000. The car is only worth about $7000. I've seen other videos showing internal cracked oil lines as the culprit for slightly older transmissions. We are towing to a second, independent repair shop for one more opinion. Any thoughts on possible root cause? Prior to this there were no noises, no odd transmission behaviors. In addition, two months prior we had taken to the dealer for a transmission fluid change as a purely maintenance item, and I've wondered whether this may have precipitated the failure.
Could be a 1-2-3-4 clutch piston problem being the fact that reverse works, if this did move forward a little, the computer assembly will not do the trick, sounds like a piston problem
Have you seen a 6T40 with no drive or reverse after a few minutes of driving.? If I come back to it after awhile, it will move again. No codes. Somewhat dark fluid. Thanks?
I have a 2012 Malibu with a 6T40. Has 72,000 miles on it. Sounds like I'm doomed! But thank you for a least telling me the truth. I never would have bought it if I saw this video. No more GM crap!
@@GaryFerraro No. I did 3 drain and refills last June using AC Delco Dexron- VI full synthetic. I drove about 200 miles between drain and refills. I was surprised to see what must have been the ATF from the factory was black. The car shifts fine.
Hi mate, you mention a axle bushing for the Drivers side, here in Australia thats the Passenger side ( the Gearing side), can you please advise what the bushing is to identify it please, as i removed one and now I am heaving big trouble identify and getting a new bushing, I have the new seal but no bushing. You mention this just before your end the video. Cheers Grant
Did you knock the bushing out already? That would be the axle bushing, there are 2 different ones early and late so make sure you give them the year. Was it leaking from there?
2016 Chevy Trax awd with the 6T40 with a P0796. No metal in the fluid. Get up to 3rd and it'll hang and then get stuck in 3rd. I replaced all solenoids and fluid and now just stays in 3rd, but i can actually get up to speed without it hanging like it's in-between gears. I did notice 2 of the solenoids were missing the bottom screens. Could this now be in the valve body causing the same code or is it time for a new transmission? I'll tear it back down if it's not a lost cause and it's actually more damage then it's worth. Also thank you for taking the time for the video and replies!
i have a 2017 malibu with a 6t40 when the trans gets hot and Im at a stop its very slow going into gear but while hot and it gets up to 40 mph - 70mph its drives fine but again as soon as I stop it will not respond like reverse does which is perfect. a new gen 3 Tehcm was installed what do you think is the problem?
gm had recall on 07 to 09 6 speeds 3 5 and reverse wave plates breaking because of insufficient heat treatment. They also extended warranty to 10yrs/120 thousands miles.
If one were to have these transmissions rebuilt by a reputable shop or rebuilder, will the problems be rectified by updated parts or will the issues happen again down the road? Are they simply unavoidable even after a rebuild?
Hi Gary, I could really use your advice. I believe I have the 6T30 in 2011 Chevy Cruze There was no reverse at the beginning and somehow it could drive forward After that I put new valve body and new solenoids and the reverse started working but overall the transmission wasn’t operating any good So I did the rebuild, all new clutch plates, clutches and also the oil pump. Nothing was broken when first opened and the oil didn’t look too bad, there was some metal shavings on the magnet but nothing crazy. The oil was also not super black. After all this the transmission still doesn’t want to hold the pressure ( I am assuming it because the shifting is bad, it is slow ). What else could be the problem? Thinking about the bushings but they seemed okay to me
@@GaryFerraro no codes at all which is very weird I did test drive it again today and it was shifting slowly, especially upshifts 3-4 After idling for about 15 minutes it couldn’t move at all, no reverse and drive. Even managed to change gears manually but the car didn’t move at all and I could rev it in gear. After 20 min and restarting the car, it moved again. Could be the torque converter or bushings? That’s all I can think of since the valve body is new and solenoids are new, and of course the clutches. Also I changed the seals except the small ones which are more like plastic at the very bottom
I have a 6T40, 2014 Buick Verano 2.0 turbo, that when it is in D, it will take off in 1st then at 3mph pop out of gear, if downhill or the momentum is there will go into 2nd at 9mph and continue on. This only happens in D when in M I can go in M all day or take off in M and at 9mph bump it over to D and will continue through the gears fine unless it needs 1s above 2mph. I have changed the TECHM, I have changed the valve body. Same result.
@@GaryFerraro before second. It ACTS LIKE 1st is gone and only works when 1st AND low/rev clutch is engaged. Would it be an accurate statement that Low/Rev stays engaged while in M1 but disengages at about 3mph when in D1?
@@GaryFerraro no codes. A code developed after changing the valve body BUT that code was 0700 I think. I left a cable not plugged in on the ECM and tried to start it. Other than that no codes.
@@dhonnoll78 Well, I'm Thinking a torn seal for the 1-2-3-4 clutch. To verify this, you would have to pull the valvebody off and air check the clutch pack
Hi Gary! You mentioned something on the axle shaft bushing towards the end of your video. I have that problem with my 2015 chevy cruze been trying to find a replacement could you possibly help me find the right one?
Hi!! I have a 2011 chevrolet malibu the previous owner waited til 100k to do the drain and fill, I got it with 185k and immediately did a drain and fill last year the day I brought it home, it was fine then, but when I got to 213k, it wouldnt go right into reverse it took like 5 seconds, so I drained and filled again, and the issue isnt as bad now at 218k, but sometimes the transmission will slip between what seems to be 3rd and 4th on long drives, reverse is still occasionally a little 2 or 3 second delay, but not always and sometimes will engage after I hit the gas, is it almost time for a rebuild or am I better off going with a used transmission? Will any additives like Lucas help if used in the correct amount? Thanks!
Transmission has been fine, learned the delayed reverse is just due to the wear and mileage, some lady tboned me and it may be worth more than I paid for it
Hello, great video by the way!! I have a 2014 chevy malibu 2.5l. When I shift into drive I hear a clunk sound that just started a few weeks ago. I hear the same sound when I'm coasting down the road and I tap on the gas pedal. I talked to my mechanic buddy and he said it could be the drive chain in the transmission or the transmission mounts? I had it the wheels off the other day to look it over. The mounts look fine and the cv shafts look good. I did notice some up and down movement where the driver side cv shaft goes in to the transmission. I could wiggle it up and down slightly. There is no oil leakage though. Is this normal?
Sorry for not replying sooner. I had my wife shift it from reverse to drive and I noticed a bit of movement with the transmission along with the clunk I keep hearing. My local mechanic mentioned it could be the mounts or the chain inside the transmission.
Hey Gary thanks for this video, it really helped me understand the problem I have on my 2010 malibu whereas I lost Reverse/3/5 wish I saw this before I got the car. I'm trying to look for a new transmission and was wondering if a 2011 trans can work in a 2010 malibu?
Hi Gary, appreciate the videos! Have a bit of a strange one, I have 2 captivas, both with an identical problem in the workshop. I tore one box down and found a broken wave plate and the resulting damage, the other one might be the same, but I think there might be something else going on as well. Both cars drove ok when cold, as soon as they warmed up, pump sounded like it was cavitating and lost all drive. The one I pulled down, whilst full of debris from the wavey failing, I could find nothing to explain the complete loss of forward and reverse. Weirdly both recently split the coolant tank and potentially overheated. Any ideas at all? Cheers! 👍
@@GaryFerraro I cut one of the filters open and it didn't look excessively bad but maybe it was! Picked oil up instantly while cold... 🤔 Cheers for the reply, I'll get one of em back together and give it a try. Was just a bit concerned the fault may have been in the tecem. Thanks 👍
The pump MUST BE replaced when you rebuild it! Trust me-put a BRAND NEW pump into it and your problem will go away. The pumps in these units tend to warp, and when they do, everything will look normal inside the pump.. You won't see any significant wear, or damage, where the pump gears ride, or on the gears themselves, but the pump will make very little, to NO pressure. Also.... If you read through the ATSG manual it specifically states that the DOTS on the inner and outter pump gears MUST BE TIMED WITH EACH OTHER! Sounds crazy, but you if you are attempting to re-run a USED GM pump, you MUST TIME/ALIGN the dots in the correct orientation as displayed in the ATSG manual. My shop offers a 5 year/100,000 mile warranty on all of our 6T45E rebuilds and we NEVER waste time with a used pump... We ALWAYS install a brand new AC Delco pump in ALL of them.. I have tried in the past to re-use GM pumps and have experienced low line pressure, loss of movement, just as you describe... Avoid the drama-replace the pump with a new one every time and I promise you this will never happen again. While you are at it-replace the 3-5-R drum, and also the ring tower, new TEHCM, all bonded pistons, all frictions, all steels, and a bushing kit, and the Trans Go shift kit-even with the new pump, and also the Sonnax wave plate update kit... THEN you will find great success in building these units. Trying to re-run used TRASH is only a recipe for disaster. You *might* get lucky and it *might* work with used parts.. or not... but if it does work-for how long? Do you want a warranty job coming back in? it makes your shop look TERRIBLE. Better to invest the $$$$ up front, and do it right, and not worry about them coming back. I spend about $1800 in parts on each 6T45E rebuild... That's WHOLESALE pricing from Transtar, or WIT... You gotta put the $$ in these units if you want them to work, and not come back under warranty. We all HATE come backs-and this unit is really bad about that if you don't put everything in them that they MUST have. This is not a high profit unit.. It is a HIGH COST unit when you want it to leave on your FIRST attempt-you have to do it right. Cutting corners with this unit is going to bring you nothing but frustration, LOST time, LOST money... Think about having to pull it again when your parking lot is FULL of new work that all pays in excess of $4000 per job... was it worth it to try and re-use a used part? HECK NO! Put the $$$ in them, GET RID OF THE JOB and move on to other new work. These units are the LEAST desirable work we get in because of the high cost of repair-for both us, and the customer, and the added time they take to work on. I can turn 4 6L80e jobs in a single day, or ONE 6T45.... You do the math.. it's a LOSING proposition working on them. I only do them because my "mom and pop" shops take them in and I don't want to send them to another shop. Given the choice we would NEVER work on one of these units... SIMPLE to build when you follow the recipe for success. but still far too much investment of resources when there are higher profit margins to be had with simpler/faster units.
Oh boy I wish I had known these transmissions were so bad before I bought a Malibu lol Got one that had rough shifts, changed fluid twice then did the trans adapt reset, now the shifts are better but 1st engagement is weak. No creeping when the brake is released... Whereas reverse is engaging well. Fluid level is right... Any suggestions? No codes whatsoever
@@GaryFerraro Thanks for the response! It actually does not feel like its slipping, but it just does not pull under 1k rpm at all... it almost feels like a high stall converter. I used an actual Dexron-VI fluid instead of a MV fluid... so I thought this would be okay. I noticed this morning while stone cold, it creeps as it should in drive, but after a 10 minute drive it goes right back to how its been behaving. Perhaps I should try ACDelco fluid anyways and see what happens
Looks very similar to the Ford 6F35. I haven't had any direct wave spring issues with those? Wonder what they did different? Love these types of videos. Thanks!
It’s a joint venture trans with GM and ford. The trans are very similar. The GM’s use the tcm in the valvebody and ford uses the pcm to control the trans
Hey Gary. I have a 2011 Chevy Cruze. Same exact thing. No reverse 3rd or 5th. And I'm getting P2723 which is pointing to solenoid E which from what I understand controls R,3,5. Do you think replacing just the solenoid would do the trick or do you think I have a broke wave plate as well? We did a drain and fill too just to see if that might work. Fluid was black but no metal. Thanks for the help in advance.
Thanks for the video! I have a Chevy Malibu 2011, the shift for 2nd to 3rd is a bit rough, and before the shift, I feel some kind of vibration near my right foot...does it sound like a faulty torque converter or transmission?
Hello i have a 2012 Chevy sonic with this tranny 6T40. it shifts great but when i turn a curve to the left it neutralize like if the oil moves away from the pickup tube. is it possible the filter has fall out?
Trying to figure out what years might interchange. I have a 2009 malibu 6sp with the 6t40 and wondering if a newer year trans would work, or possibly a newer 6t70? Any idea?
Thanks for your video. I have 2011 cruze with a problem that only the 5th gear does not engage(3rd and reverse are works fine). Any idea what can cause such a behavior?
@@GaryFerraro Hello, it seems that the transmission go to neutral (when flooring the gas the revs go up but the car does not accelerate)no error codes observed!Thanks for your help.
@@andrewgonchar3110 3-4 shift no problem? I've seen issues with the 4-5-6 clutch drum. If 3-4 shift is ok maybe be a valvebody or solenoid issue. Your sure it's 5th?
No reverse: drop pan and filter. Retoque valve body bolts. New filter and refill with new fluid. DON'T WAIT. Slipping wears out clutch packs very fast.
@@tssci6774 Clutch plates not wave plates. They all have pans some filters are cleanable. 4 most common transmission problems. 1. Leaking externally from transmission cooler lines or radiator. No fluid no go. 2. Sludge in the valve body because of old fluid contaminated by water from condensation. Clogging passages. 3. Internal leaking caused loose bolts on the valve body. Causing lo pressure at the servo which compress the clutch plates in the clutch packs or apply a band. (works like a drum brake) 4. Bad electrical connections.
@@suggesttwo There is no pan on this transmission. The filter is not accessible for a normal service, and the term is wave plate or wave steel that fails as the author and ATRA describes it.
Hi Gary Do you have any type of experience with the GM 2ml70 hybrid transmission I gotta install a reman unit on one truck Any tips on how to replace this unit? Thank you in advance
Hello! My 2014 Chevrolet Sonic with 44,000 miles has a similar transmission, the 6T30. Will frequent ATF drain & fills help prevent these issues, or are these failures unavoidable? Thanks in advance!
@@pcmacp719c1 From the 6t30 to the 6t70, they all have this issue, haven't had many 6t30, i see this on 6t40, basically same unit to difference may be the torque rating
Hi Gary sorry for bugging but I got referred to u by a friend I just got a 2010 528i bmw and at first it was smothbuth now when I step on it if feels like something is sliping and then it takes off do u think its the transmission
Hi I have the same gearbox in my opel astra. is it worth a repair or will the problem come back later? or are other parts installed? Sorry for my english
Please I need your help.. the problem is on my 6T40 on a 2012 cruz when the car start moving the first gear shifting make a sound where I can hear the shift but the sound is not always there. I've changed the fluid and the sound is still there . What could it be... please help.. thanks
@@GaryFerraro the noise go when it shifts to 2nd gear but the sound is not related with the engine speed so when taking off the engine speed is around 2000 rpm.
@@abdulateefabdulateef8225 May not be transmission related, the planetary gears are spinning up then may stop spinning in 2nd but the noise should change pitch as the engine rpm's get high, so the noise does not change?
I have a Daewoo Lacetti 2009 Premier (the same as the Chevy Cruz). It got the P0501 error code for the VSS. Can you please tell me where is it located? Is it easy to reach?
@@GaryFerraro ... No. Just the P0501 along with the P0700. I also had the transmissiin control module scanned and no codes were detected. The only thing I see on the dashboard is the speedometer going "haywire"! And irregular gear shifting. My car's transmission is the same one as that one on the chevy cruz.
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Dear Gary,I'm having problems with my own Astra (Opel/GM) 6T45 transmission. Bought this car with transmission issues (harsh, bumpy shifts and flares) expecting to fix them myself. I've done a few 6t40's/6t45's with the common 'no 3rd, 5th, reverse'. This specific transmission seems to have undergone a rebuild before where they replaced the waveplate from the 3,5,R. But it's a Gen1 trans and there was a Gen2 3,5,R/4,5,6 drum installed, with a 3 ring stator. That didn't seem right so i've changed that with the correct drum and a 4-ring stator. Installed the correct parts such as return spring and piston for 4,5,6. I put the transimission back together and also replaced the solenoids from the TEHCM and the valve body because there was a lot of steel debris in the trans.However, the trans still doesn't shift properly. Especially when the trans is at operating temperature. Shift flares at 3-4 shift, 2-3 shift (sometimes) and 5-6 shift. In general the shift quality is poor. Once in gear there are no slips. The ECU doesn't give any codes.Could it be that the pressure switches are going bad, but not bad enough jet to produce a dtc?? Or do you have another idea of what might be going on??Any help is much appreciated!!
Have you ever figured out the problem with the transmission flare from 2-3 and 3-4. I have the same issue and it only does it after the tranny is warmed up. No codes either. If it has to do with the pressure switches I would probably do that my self I know this is one of the common issues and the reason gen 2 doesn't have them. Lol I want to do the wave plate too but can't bring myself to do that much work now.
Hi Gary
I am from South Africa and I have a 2017 Chevrolet Captiva 2.2D with a 6T50 Transmission.
About 3 years ago the input shaft broke and I sent it to the local mechanic, and he replaced the input shaft, put the transmission back together and everything was just fine. Last year the input shaft broke again so I took it to the same mechanic he replaced the shaft and the hub but when I got the vehicle back, I noticed that it would shift from 5th to 6th gear but as soon as the vehicle gets the slightest uphill, it will shift back from 6th gear to 5th gear and it will not shift back to 6th gear again. I eventually took the vehicle to the neighbouring town to a so-called gearbox specialist. It is now 10 months later, and they still are not able to fix the transmission yet. They have replaced the Transmission Control module twice; this has not fixed the issue. They then replaced the torque converter but that did not fix the issue. They then sent it to another workshop where the torque converter was replaced again and they also replaced the hydraulic pump, but when they put it back together the issue remained. I would like to know if you would have any advice or guidance on what the problem could be.
is your foot steady on the gas or are you pressing down to go faster
@@GaryFerraro Hi, it will not go into 6th gear again either when my foot is steady on the gas or when I'm pressing down to go faster. If you stop the vehicle and switch it off and switch it back on it will shift through to 6th gear but will shift back to 5th and the same pattern will happen.
do you have a scan tool to see if its being commanded to do this@@bennievanzyl9709
Wonderful videos on the 6t40 Gary, thanks! I got pulled into this topic because my wife inherited a 2011 Buick regal with a 6T40 transmission, still in beautiful shape, but at 60k it stopped going forward at all, reverse still worked. In drive, car moves a little forward, then stops with engine still revving. We got a check engine light with a P2723/P0700 engine codes. Towed to dealer, and they tried the GM-recommended fix of replacing the computer+solenoid assembly in the transmission - $2500 repair! No help though, and so they said replace the whole transmission for $5000. The car is only worth about $7000. I've seen other videos showing internal cracked oil lines as the culprit for slightly older transmissions. We are towing to a second, independent repair shop for one more opinion. Any thoughts on possible root cause? Prior to this there were no noises, no odd transmission behaviors. In addition, two months prior we had taken to the dealer for a transmission fluid change as a purely maintenance item, and I've wondered whether this may have precipitated the failure.
Could be a 1-2-3-4 clutch piston problem being the fact that reverse works, if this did move forward a little, the computer assembly will not do the trick, sounds like a piston problem
Have you seen a 6T40 with no drive or reverse after a few minutes of driving.? If I come back to it after awhile, it will move again. No codes. Somewhat dark fluid. Thanks?
I 'll have to carry a bucket in my 2012 Malibu to vomit in when my transmission breaks.
LOL, Thanks for watching, stay safe
I use one’s literally 500 bucks. You’re lucky it’s not a full-size SUV. You’re looking at like two grand.
I have a 2012 Malibu with a 6T40. Has 72,000 miles on it. Sounds like I'm doomed! But thank you for a least telling me the truth. I never would have bought it if I saw this video. No more GM crap!
are you having any issues now with the trans?
@@GaryFerraro No. I did 3 drain and refills last June using AC Delco Dexron- VI full synthetic. I drove about 200 miles between drain and refills. I was surprised to see what must have been the ATF from the factory was black. The car shifts fine.
Hi mate, you mention a axle bushing for the Drivers side, here in Australia thats the Passenger side ( the Gearing side), can you please advise what the bushing is to identify it please, as i removed one and now I am heaving big trouble identify and getting a new bushing, I have the new seal but no bushing. You mention this just before your end the video. Cheers Grant
Did you knock the bushing out already? That would be the axle bushing, there are 2 different ones early and late so make sure you give them the year. Was it leaking from there?
2016 Chevy Trax awd with the 6T40 with a P0796. No metal in the fluid. Get up to 3rd and it'll hang and then get stuck in 3rd. I replaced all solenoids and fluid and now just stays in 3rd, but i can actually get up to speed without it hanging like it's in-between gears. I did notice 2 of the solenoids were missing the bottom screens. Could this now be in the valve body causing the same code or is it time for a new transmission? I'll tear it back down if it's not a lost cause and it's actually more damage then it's worth. Also thank you for taking the time for the video and replies!
Thanks for the videos, have you ever used the 3-5-R drum saver kit such as the one offered by sonnax to remedy this issue with success?
I have not use one yet
i have a 2017 malibu with a 6t40 when the trans gets hot and Im at a stop its very slow going into gear but while hot and it gets up to 40 mph - 70mph its drives fine but again as soon as I stop it will not respond like reverse does which is perfect. a new gen 3 Tehcm was installed what do you think is the problem?
gm had recall on 07 to 09 6 speeds 3 5 and reverse wave plates breaking because of insufficient heat treatment. They also extended warranty to 10yrs/120 thousands miles.
You are correct, my buddy had it done the first time under there warranty, then i did the trans last year
What recall? I don't believe they ever issued an actual recall, just the extension to warranty
If one were to have these transmissions rebuilt by a reputable shop or rebuilder, will the problems be rectified by updated parts or will the issues happen again down the road? Are they simply unavoidable even after a rebuild?
A good rebuilder or shop will update any parts that need to be, I do this, even if they are good, i update them
Hi Gary, I could really use your advice.
I believe I have the 6T30 in 2011 Chevy Cruze
There was no reverse at the beginning and somehow it could drive forward
After that I put new valve body and new solenoids and the reverse started working but overall the transmission wasn’t operating any good
So I did the rebuild, all new clutch plates, clutches and also the oil pump. Nothing was broken when first opened and the oil didn’t look too bad, there was some metal shavings on the magnet but nothing crazy. The oil was also not super black. After all this the transmission still doesn’t want to hold the pressure ( I am assuming it because the shifting is bad, it is slow ). What else could be the problem? Thinking about the bushings but they seemed okay to me
did you scan it to see if any codes are present
@@GaryFerraro no codes at all which is very weird
I did test drive it again today and it was shifting slowly, especially upshifts 3-4
After idling for about 15 minutes it couldn’t move at all, no reverse and drive. Even managed to change gears manually but the car didn’t move at all and I could rev it in gear. After 20 min and restarting the car, it moved again. Could be the torque converter or bushings? That’s all I can think of since the valve body is new and solenoids are new, and of course the clutches. Also I changed the seals except the small ones which are more like plastic at the very bottom
@@egilsb4187 Sounds like the filter is clogging up
@@GaryFerraro ok I will check it out, it was also new
thanks for the help brother
I have a 6T40, 2014 Buick Verano 2.0 turbo, that when it is in D, it will take off in 1st then at 3mph pop out of gear, if downhill or the momentum is there will go into 2nd at 9mph and continue on. This only happens in D when in M I can go in M all day or take off in M and at 9mph bump it over to D and will continue through the gears fine unless it needs 1s above 2mph.
I have changed the TECHM, I have changed the valve body. Same result.
would you say it slips on the 1-2 shift? or before 2nd gear
@@GaryFerraro before second. It ACTS LIKE 1st is gone and only works when 1st AND low/rev clutch is engaged. Would it be an accurate statement that Low/Rev stays engaged while in M1 but disengages at about 3mph when in D1?
@@dhonnoll78 Are there any codes present by chance?
@@GaryFerraro no codes. A code developed after changing the valve body BUT that code was 0700 I think. I left a cable not plugged in on the ECM and tried to start it. Other than that no codes.
@@dhonnoll78 Well, I'm Thinking a torn seal for the 1-2-3-4 clutch. To verify this, you would have to pull the valvebody off and air check the clutch pack
Hi, what options exist to replace a 6t40 on a 1.4L in a chevy sonic with at least a minimum of 400 wheel horse power ?
Hi, first thank you for the videos! How difficult or easy is it to press the drum on and off the shaft? Any danger areas to be aware of?
Thanks again.
The shaft is held on place by a small snap ring, get the snap ring out and the shaft will pull right out
Hi Gary! You mentioned something on the axle shaft bushing towards the end of your video. I have that problem with my 2015 chevy cruze been trying to find a replacement could you possibly help me find the right one?
Where are you located? do you have the tools to change it? is the trans still in the car?
Hi!! I have a 2011 chevrolet malibu the previous owner waited til 100k to do the drain and fill, I got it with 185k and immediately did a drain and fill last year the day I brought it home, it was fine then, but when I got to 213k, it wouldnt go right into reverse it took like 5 seconds, so I drained and filled again, and the issue isnt as bad now at 218k, but sometimes the transmission will slip between what seems to be 3rd and 4th on long drives, reverse is still occasionally a little 2 or 3 second delay, but not always and sometimes will engage after I hit the gas, is it almost time for a rebuild or am I better off going with a used transmission? Will any additives like Lucas help if used in the correct amount? Thanks!
Transmission has been fine, learned the delayed reverse is just due to the wear and mileage, some lady tboned me and it may be worth more than I paid for it
Hello,
great video by the way!! I have a 2014 chevy malibu 2.5l. When I shift into drive I hear a clunk sound that just started a few weeks ago. I hear the same sound when I'm coasting down the road and I tap on the gas pedal. I talked to my mechanic buddy and he said it could be the drive chain in the transmission or the transmission mounts? I had it the wheels off the other day to look it over. The mounts look fine and the cv shafts look good. I did notice some up and down movement where the driver side cv shaft goes in to the transmission. I could wiggle it up and down slightly. There is no oil leakage though. Is this normal?
You may have Slight movement, if not leaking should be ok. When the mounts where checked was someone sitting in the car power breaking it?
Sorry for not replying sooner. I had my wife shift it from reverse to drive and I noticed a bit of movement with the transmission along with the clunk I keep hearing. My local mechanic mentioned it could be the mounts or the chain inside the transmission.
@@Wayneanderson-x5w Not the chain, if you power brake the car in drive is there a lot of engine movement ? that will tell you if the mounts are good
Hey Gary thanks for this video, it really helped me understand the problem I have on my 2010 malibu whereas I lost Reverse/3/5 wish I saw this before I got the car. I'm trying to look for a new transmission and was wondering if a 2011 trans can work in a 2010 malibu?
Is this a used transmission your getting?
@Gary Ferraro yes it is, out of a junk yard.
@@benjaminwilliams2359 I think it will fit but you should confirm this through the vin numbers
Hi Gary, appreciate the videos! Have a bit of a strange one, I have 2 captivas, both with an identical problem in the workshop. I tore one box down and found a broken wave plate and the resulting damage, the other one might be the same, but I think there might be something else going on as well. Both cars drove ok when cold, as soon as they warmed up, pump sounded like it was cavitating and lost all drive.
The one I pulled down, whilst full of debris from the wavey failing, I could find nothing to explain the complete loss of forward and reverse.
Weirdly both recently split the coolant tank and potentially overheated.
Any ideas at all? Cheers! 👍
The filter is getting clogged up, when the filter clogs, you will loose drive
@@GaryFerraro I cut one of the filters open and it didn't look excessively bad but maybe it was! Picked oil up instantly while cold... 🤔 Cheers for the reply, I'll get one of em back together and give it a try. Was just a bit concerned the fault may have been in the tecem. Thanks 👍
The pump MUST BE replaced when you rebuild it! Trust me-put a BRAND NEW pump into it and your problem will go away. The pumps in these units tend to warp, and when they do, everything will look normal inside the pump.. You won't see any significant wear, or damage, where the pump gears ride, or on the gears themselves, but the pump will make very little, to NO pressure. Also.... If you read through the ATSG manual it specifically states that the DOTS on the inner and outter pump gears MUST BE TIMED WITH EACH OTHER! Sounds crazy, but you if you are attempting to re-run a USED GM pump, you MUST TIME/ALIGN the dots in the correct orientation as displayed in the ATSG manual. My shop offers a 5 year/100,000 mile warranty on all of our 6T45E rebuilds and we NEVER waste time with a used pump... We ALWAYS install a brand new AC Delco pump in ALL of them.. I have tried in the past to re-use GM pumps and have experienced low line pressure, loss of movement, just as you describe... Avoid the drama-replace the pump with a new one every time and I promise you this will never happen again. While you are at it-replace the 3-5-R drum, and also the ring tower, new TEHCM, all bonded pistons, all frictions, all steels, and a bushing kit, and the Trans Go shift kit-even with the new pump, and also the Sonnax wave plate update kit... THEN you will find great success in building these units. Trying to re-run used TRASH is only a recipe for disaster. You *might* get lucky and it *might* work with used parts.. or not... but if it does work-for how long? Do you want a warranty job coming back in? it makes your shop look TERRIBLE. Better to invest the $$$$ up front, and do it right, and not worry about them coming back. I spend about $1800 in parts on each 6T45E rebuild... That's WHOLESALE pricing from Transtar, or WIT... You gotta put the $$ in these units if you want them to work, and not come back under warranty. We all HATE come backs-and this unit is really bad about that if you don't put everything in them that they MUST have. This is not a high profit unit.. It is a HIGH COST unit when you want it to leave on your FIRST attempt-you have to do it right. Cutting corners with this unit is going to bring you nothing but frustration, LOST time, LOST money... Think about having to pull it again when your parking lot is FULL of new work that all pays in excess of $4000 per job... was it worth it to try and re-use a used part? HECK NO! Put the $$$ in them, GET RID OF THE JOB and move on to other new work. These units are the LEAST desirable work we get in because of the high cost of repair-for both us, and the customer, and the added time they take to work on. I can turn 4 6L80e jobs in a single day, or ONE 6T45.... You do the math.. it's a LOSING proposition working on them. I only do them because my "mom and pop" shops take them in and I don't want to send them to another shop. Given the choice we would NEVER work on one of these units... SIMPLE to build when you follow the recipe for success. but still far too much investment of resources when there are higher profit margins to be had with simpler/faster units.
Oh boy I wish I had known these transmissions were so bad before I bought a Malibu lol
Got one that had rough shifts, changed fluid twice then did the trans adapt reset, now the shifts are better but 1st engagement is weak. No creeping when the brake is released... Whereas reverse is engaging well. Fluid level is right... Any suggestions? No codes whatsoever
does it feel like it's slipping on takeoff
@@GaryFerraro Thanks for the response! It actually does not feel like its slipping, but it just does not pull under 1k rpm at all... it almost feels like a high stall converter. I used an actual Dexron-VI fluid instead of a MV fluid... so I thought this would be okay.
I noticed this morning while stone cold, it creeps as it should in drive, but after a 10 minute drive it goes right back to how its been behaving.
Perhaps I should try ACDelco fluid anyways and see what happens
@@turbofiero86 Fluid you used is ok, Any codes?
@@GaryFerraro just a U0422 (Invalid data received from Body Control Module) which I assume to be unrelated
@@turbofiero86 Is the trans in limp mode with that code?
Vielen Dank super video
Looks very similar to the Ford 6F35. I haven't had any direct wave spring issues with those? Wonder what they did different? Love these types of videos. Thanks!
I think ford made the plate much better, haven't really seen that either on fords
It’s a joint venture trans with GM and ford. The trans are very similar. The GM’s use the tcm in the valvebody and ford uses the pcm to control the trans
Hey Gary. I have a 2011 Chevy Cruze. Same exact thing. No reverse 3rd or 5th. And I'm getting P2723 which is pointing to solenoid E which from what I understand controls R,3,5. Do you think replacing just the solenoid would do the trick or do you think I have a broke wave plate as well? We did a drain and fill too just to see if that might work. Fluid was black but no metal. Thanks for the help in advance.
I should mention I can actually hit 3rd. It just slips as soon as I do. I actually made it to 4th earlier today.
Rarely the solenoid for this problem, haven't seen that yet
@@GaryFerraro Would you suggest trying it first just to see? Replacing the whole TCM?
Thank you for the video, did you have a reassembly video too of the 6t40?
I do not have one yet
@@GaryFerraro ok, thanks for the great videos
Thanks for the video! I have a Chevy Malibu 2011, the shift for 2nd to 3rd is a bit rough, and before the shift, I feel some kind of vibration near my right foot...does it sound like a faulty torque converter or transmission?
Any codes? how is reverse engagement?
@@GaryFerraro No codes, reverse engagement is fine. Just the rough shift when cold and then vibrations when hot (2nd to 3rd, around 25 MPH)
@@djamalbensebaa469 did you ever find out the problem and fix
Hello i have a 2012 Chevy sonic with this tranny 6T40. it shifts great but when i turn a curve to the left it neutralize like if the oil moves away from the pickup tube. is it possible the filter has fall out?
I don't think the filter fell out, sounds like low on fluid
Trying to figure out what years might interchange. I have a 2009 malibu 6sp with the 6t40 and wondering if a newer year trans would work, or possibly a newer 6t70? Any idea?
Theres Generation one and generation 2, they cannot interchange, mGen 2 started around 2013 but heard reports of seeing them in 2012 also
@@GaryFerraro thank you for your reply, I think I'm going to go tomorrow as there's a 2011 that was sideswiped so the trans should be fine
Is there a way to avoid this to happen? I've Malibu 2018 around 40 K miles yet.
Your trans should have the updated parts already. The only thing you can do is a drain and fill , no pan to drop and you can't change the filter
Gary Ferraro thanks for replying Gary. I’ll do that.
@@avinanrey Ok, thanks for watching
I will help mechanic s like u helped me thankyou
Thanks for your video. I have 2011 cruze with a problem that only the 5th gear does not engage(3rd and reverse are works fine). Any idea what can cause such a behavior?
What actually happens, when it should shift to 5th? does it seem like it goes to neutral? any codes? does it have 5th when cold?
@@GaryFerraro Hello, it seems that the transmission go to neutral (when flooring the gas the revs go up but the car does not accelerate)no error codes observed!Thanks for your help.
@@andrewgonchar3110 3-4 shift no problem? I've seen issues with the 4-5-6 clutch drum. If 3-4 shift is ok maybe be a valvebody or solenoid issue. Your sure it's 5th?
@@GaryFerraro 100%.to day will take it to the garage let's see what they can find out
@@andrewgonchar3110 ok, let me know what they say
No reverse: drop pan and filter. Retoque valve body bolts. New filter and refill with new fluid. DON'T WAIT. Slipping wears out clutch packs very fast.
There is no pan or filter that can be changed in a normal service. It is a metalurgical issue with the wave plates.
@@tssci6774 Clutch plates not wave plates. They all have pans some filters are cleanable. 4 most common transmission problems.
1. Leaking externally from transmission cooler lines or radiator. No fluid no go.
2. Sludge in the valve body because of old fluid contaminated by water from condensation. Clogging passages.
3. Internal leaking caused loose bolts on the valve body. Causing lo pressure at the servo which compress the clutch plates in the clutch packs or apply a band. (works like a drum brake)
4. Bad electrical connections.
@@suggesttwo There is no pan on this transmission. The filter is not accessible for a normal service, and the term is wave plate or wave steel that fails as the author and ATRA describes it.
Hi Gary
Do you have any type of experience with the GM 2ml70 hybrid transmission
I gotta install a reman unit on one truck
Any tips on how to replace this unit?
Thank you in advance
I have not done any of those yet
Makes quoting very hard.Cant count on simple rebuild estimate.thanks .
Yes, i do alot of wholesale, sometimes i wish i got more
Hello! My 2014 Chevrolet Sonic with 44,000 miles has a similar transmission, the 6T30. Will frequent ATF drain & fills help prevent these issues, or are these failures unavoidable? Thanks in advance!
Fluid changes will not help, just happens by driving the car
@@GaryFerraro Thanks for the reply. =) Have you seen any 6T30s develop failures, or more 6T40s (If there is a difference)?
@@pcmacp719c1 From the 6t30 to the 6t70, they all have this issue, haven't had many 6t30, i see this on 6t40, basically same unit to difference may be the torque rating
@@GaryFerraro I guess all I can do is drive conservatively and hope for the best.
Thanks again, hope you have a great weekend. =)
Cycle Michael hey man I got a 2012 sonic with 6T30 I just dropped it off to the shop for a rebuild yesterday at 80k miles. Good luck lol
Are there any recalls on this if it is so common? The same happened to me as well.
Its 2 No recalls that I know of
Just having same issue on my astra J 1.6 50k on the clock :(
Thx for the video
Welcome
@@GaryFerraro any info about repair price?
I guess 1000 £/$
@@kristofszabo1357 Here in the states, i get around 3000 u.s dollars
@@GaryFerraro thank you
Hi Gary sorry for bugging but I got referred to u by a friend I just got a 2010 528i bmw and at first it was smothbuth now when I step on it if feels like something is sliping and then it takes off do u think its the transmission
Sorry I forgot to say thank u and God bless u
@@EdgarVasquez-hm5wq so this is on pull away correct, are there any codes present for the transmission? how is reverse?
@@GaryFerraro yes its on pull away and there is no codes present also reverse is good no problems there
Hey Gary where can I obtain the repair kits and additional parts for this transmission?
Where are you located?
@@GaryFerraro DALLAS texas
I could probably hook you up with my rep here in NY
Hi
I have the same gearbox in my opel astra. is it worth a repair or will the problem come back later?
or are other parts installed?
Sorry for my english
What is the problem, no 3rd, 5th or reverse
@@GaryFerraro gearbox jerked when shifting
Can theses problems be eliminated with more fluid changes or is it a design issue
I would say it's a design issue
I want vedio on ford explorer transmission reper and replace flter.think you boss
Please I need your help.. the problem is on my 6T40 on a 2012 cruz when the car start moving the first gear shifting make a sound where I can hear the shift but the sound is not always there. I've changed the fluid and the sound is still there . What could it be... please help.. thanks
Do you hear the sound in all ranges, Park, reverse neutral and drive?
@@GaryFerraro just in drive and it's not always there but it is in most cases
@@abdulateefabdulateef8225 Does the noise change with engine speed? does the noise go away when shifts to 2nd?
@@GaryFerraro the noise go when it shifts to 2nd gear but the sound is not related with the engine speed so when taking off the engine speed is around 2000 rpm.
@@abdulateefabdulateef8225 May not be transmission related, the planetary gears are spinning up then may stop spinning in 2nd but the noise should change pitch as the engine rpm's get high, so the noise does not change?
I have a Daewoo Lacetti 2009 Premier (the same as the Chevy Cruz). It got the P0501 error code for the VSS. Can you please tell me where is it located? Is it easy to reach?
I have to research, the signal may con from the ABS, do you have any abs wheel speed sensor codes?
@@GaryFerraro ... No. Just the P0501 along with the P0700. I also had the transmissiin control module scanned and no codes were detected. The only thing I see on the dashboard is the speedometer going "haywire"! And irregular gear shifting. My car's transmission is the same one as that one on the chevy cruz.
@@TheKhwailed let me see what i can find out, what is the engine size?
1.6 leters ... 4 cylinders .. 16 valves ... I saw another video of you tearing down a 6T40 transmission. That's it!
Daewoo Lacetti 2009 1.6 DOHC
Dear sir your sharing very valuable information but we have request please can you use good camera
As of about one month ago, i purchased a new computer so all will be good now, thanks for watching
Hi hello how are you
Im doing well, thanks for masking
6T40 very low guality, in my car similar damage = 67 000km
No 3rd,5th or reverse is very common
I have something problem whit the trans 6t45, code u0100!!
is the code by chance U0101? Does the car shift or stay in one gear?
@@GaryFerraro change a transmission for another of a 2012 cruze car, nothing when I start gave forward and reverse, now it is not neutralized!
Sorry Gary it's neutralized!
@@isacolivas926 ok, so you put a used trans in or rebuilt the original one
@@GaryFerraro hi Gary, I put a repaired transmission, the original repair later to have in existence!