2019 Silverado 1500 8L90 Transmission Service
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- เผยแพร่เมื่อ 6 ก.ย. 2024
- Changing the transmission fluid and filter on my 2019 Silverado 1500 8L90 8-speed transmission.
Owner’s manual recommends service at 45,000 mile intervals. Fluid and filter.
Supplies:
Mobil1 Synthetic LV ATF HP 7.5 quarts (estimated for pan change only)
OEM trans filter: part # 24298900
OEM trans pan gasket: part # 24260071
Tools:
1/4” ratchet
10mm long and short socket
1/4” in-lb torque wrench
1/4” extension
Fluid pump with fill hose
A large/wide oil pan
Just helped my brother-in-law today with his 2020 Silverado 1500 5.3 with 8L90 (72k miles), his shifting was bad (felt like the transmission didn't know what to do) but luckily I'd say we fixed it with just a fluid change. One thing I noticed by the level check procedure before we did anything we checked the current level at 180 degrees which the truck seems to be happy at 176 degrees but warmed up a bit when sitting. Any how I believe some of these transmissions were overfilled by 1 quart (maybe more), while that doesn't seem like much if you know how these things work, even a little knowledge, the extra quart is just causing extra pressure and heat overtime can definitely be catastrophic. So before opening the pan we already pulled one quart out which I believe was overfilled. We then proceeded to drop the pan and filter, (FYI no auto parts stores have the filter or pan seal in stock, its Sunday so I couldn't call any dealers but I believe they have the same issue so luckily the pan seal was good condition and we prayed the filter will just have to do). Moving forward we got another 5.5 quarts out of the system, a total of 6.5 quarts came out. We cleaned pan, and the magnets etc (the fluid was brown definitely not good but could have been worse but more importantly the magnets and metal shavings were not on the severe side so the torque converter was safe, *there is a service bulletin that had a picture of what the magnet would look like if the torque converter was toast and it essentially would look like a wire brush that you put on a drill, that was not the case for us) so we bolted everything back up. Since I knew we are probably looking at putting back 5.5 quarts, I put 6 quarts in. The best way to do this is some type of pump, look up converting a Round Up jug to a fluid pump TH-cam video. We got 6 quarts in, once the first 3 quarts were in we started the truck and broski sat in it while in Drive holding brake so trans can warm up, once filled we drove it, it actually took about 20 minutes of driving to get it to 176 degrees which it was able to maintain even after one pull which pushed it to 182 degrees then it went back down to 176 degrees rather quickly, (GM refuses to state what the operating temp is, and since no dipstick GM has not put an operating temp in the vehicle manual, so my best guess is 175 degrees is the 8L90's happy place) based on experience with this truck. When we got back, we did the fluid level check procedure (its pulling a bolt which most people think is the drain bolt but its not, its actually the level check bolt (or service check bold) at operating temperature nothing should drain, this is why I purposely overfilled it to 6 quarts) and exactly 0.5 quart came back out, indicating to me the system was originally overfilled. While this truck was overfilled by 1 quart it may have been over filled by more and some burned away, not sure unless I have a low mileage truck to further investigate. AMSOIL ATF was used for replacement fluid see their site for specifics and brother-in-law drove back home over 70 miles and reports smooth shifting all the way. I'm hopefully gonna have him come back for some more fluid changes diffs etc and another trans change once we can acquire a filter. I just had to get this info out to hopefully save some beloved Chevy trucks. FYI this damn 8spd transmission is used in a variety of GM vehicles, Cadillacs, Chevys, GMCs and what most people don't know it was a collaboration design between GM and Ford, I feel like Ford set up GM on this one hahaha. I would like to make a video on this to help people but for now I'm gonna throw this comment on as many relevant videos to help people. PS at least on the 5.3 Silverado the exhaust gets in the way of pulling the pan off, so unbolting the cats from the headers is required, but I was short on ratchet extensions so I did some back door maneuver supported the transfer case with jack removed the crossmember to slip the pan from the rear, this still required disconnecting exhaust near the Y pipe to get some flex about 0.5 inch to be able to pull the pan off without removing the cats entirely, FYI it was annoying, just be prepared to curse lol. GOOD LUCK!
Thank you, sir.
Looking forward to your video.
It was a bit of a pain. Definitely wish I had a bay.
Thanks.
What transmission fluid did you use? My truck is asking for Dexron HP but I cannot find it anywhere.
Wish I could find a video of this service where the exhaust crosses over under the pan. I either will have to pry on it or disconnect it. Good video tho!
My 2019 Chevy Trail Boss was shifting hard after a couple years. Dealer did a transmission flush. Said from
the factory they had a transmission fluid that allowed it to collect moisture and gel which was causing the hard shifting. He had a technical term “hydro…?” something that the old transmission fluid either did or didn’t have. It’s been better but occasionally still shifts hard as I’m slowing down to a stop during that last gear change before I stop. I’ve had several other issues with this truck. Only new truck I’ve ever purchased. It really has my changed opinion of Chevy.
It’s only at 65,000 currently and the oil cooling lines started leaking during this recent cold snap (TX). I guess I’ll be doing that this weekend.
They did update the fluid. It was a little better. Still shifted hard from time to time. I only kept it to about 75000 miles and traded it in on a Super Duty.
Think the hydro word was hydroscopic meaning it easily absorbs water.
This is a great video covering the newer 8l90 transmission, 2019 new body style and up for most 5.3l engines. The Silverado 5.3 is definitely a hassle with the exhaust y pipe. Dropping or at least relieving some stress by dismounting the upper 6 bolts would help, but i did not do this. I was able to leave my pan hanging, caught up by the y pipe, and completely clean with rags and microfibers, including the gasket mating surfaces and magnets at bottom of pan, it is highly stressful and to use clean gloves consistently to keep the transmission clean. Also, with the open space provided I was able to remove the filter and install a new one, just remember doing so also releases more transmission fluid so either do this first before cleaning entire pan. Im weary of the new check method, but it seems to have taken a little less than 6 quarts, which is about what came out. I reused the gasket as they at least make it more durable these days. I used a new filter and 7 quarts Mobil 1 LV ATF HP purchased from local dealer parts store. I did use 7 qrts but maybe 1.5 came back out after reaching correct level, and being that I lost fluid when correcting the level, its better then to go back up and pump more in. I had very minimal slippage and hard shift but this was over due maintenance for me so thats why I did the job myself and of course being out of warranty. It is doable but just make sure your capable. I did so to save a bill or two but if your unsure of the process I'd recommend to spend an extra bill or two. I will eventually add an aftermarket filler by B&M. Finally, after running, I have noticed smoother shifting and minimal hard shift but again very minimal as this was just overdue routine maintenance.
Agreed on topping off vs overfilling. So far so good in the first few thousand miles.
Where do you drain it from? To check if it’s at the correct level.
It's sad that Chevy did away with the dip stick. I guess they want to make it difficult to check your transmission fluid level.
I still plan on adding one. B&M has a kit for it.
@@slowsmoothfast thanks! I did not realize anyone had come up with a kit to add one. Will definitely look into this
Ya! And they want'a charge you $500.00, bastards!
You might be able to use a Washer under Bolt to fix the heat shield side bolt 10:10
Thanks for this. I've been racking my brain trying to get all the steps together for this service! Now no one wants to sell me the filter and gasket! I'm at 106k and it's starting to shift hard now and then ugh
I bought mine at the dealer. Maybe go on gmpartsdirect.com.
After you changed the fluid and filler did the shift hard stop? I’m getting that right now at 121k miles
@@michealbaxter6572 actually yea, I found a trustworthy shop and they found basically the trans oil that’s not supposed to be used anymore and some moderate shavings on the pan magnet. Bro that fluid was black! Got the filter changed and the right fluid in, ran great immediately after and still good 10k miles later. 500 bucks is what it cost me in TX. I’m contemplating having the service done again soon as preventative maintenance
I have 2016 escalade with 8l90 transmission. Reason fluid so dark is overheating. I bypassed cooler line thermostat. Trans temp drop and stay significantly lower. Also good idea to use amsoil atf fluid.
I will have to try that.
I think these transmissions are just really dirty.. mine was extremely dirty like this when dropping pan. It's been a month or two so I flushed the fluid today and it's dark already, but much cleaner than before.
Transmission still works perfectly fine and it's tuned to fix alot of converter slipping which also causes this.
I also have thermostat delete and temps rarely go above 150
Thank you for the video. Did you feel anything different with the transmission shifting after the oil changed?
Gor 50k mikes thats Normal Clutch material thats a very small amount of wear 12:37
Tbh if someone buys a new vehicle as the first owner of the car simply do a transmission every year
Now if you drive a lot and the manufacturer says(for example) service the transmission@50k miles service it at half that 25k miles
My 2015 Malibu with 270k miles never had a transmission service but also never gave me transmission problems but at 267k miles I had the transmission rebuilt because all that old oil turned to black and had a lot of metal flakes and had clogged the shift solenoids and rather than tearing down the transmission only to clean it and put a new filter and put it back together didn’t make sense
What made sense was to rebuild it and install new shift solenoids/filter/torque converter/gears & sensors
After that the transmission shop recommended me to service it every 30k or once a year
Which is something I always thought that I should have done but also most mechanics were telling me no the oil is for the
Lifetime of the vehicle and don’t ever service it
My common sense tells me if your going to drive your vehicle a lot and want it to last as long as possible, give the vehicle the maintenance it deserves
So are you saying that these 8l 90 transmissions do not come factory with dexron 6 synthetic fluid? Does anyone know?
The first gen of the new Silverados with that transmission came with Dex 6. They later switched to Dex HP.
You are supposed to use the service bolt on the pan and fill it from the bottom
Your video is very helpful , thanks
You’re welcome
,why not run a hose with funnel from the top of the engine instad of pumping it in??? Just a thought.
Underrated comment. I’m interested in knowing as well. Going to do it myself
I was already underneath the truck. Just did it like that.
But a long funnel with a flex hose will work too.
I'm somewhat confused. If you look at the 15:18 mark, the pan appears to have a standoff pipe that could be used to check the fluid level. The fluid would overflow into the top of the pipe while the engine running and up to temp. Does this transmission not use that method and is checked through the fill port?
How come no one mentions about changing the thermostat on the side of the transmission? I’m just curious just got my done on my own but I decided to change it.
I didn’t even know 😂
Thanks for the video. What is the procedure for checking the fluid level? Im confused. It should be filled until it starts coming out of that top bolt?
Yes. Fill slowly until you see it coming from the top bolt.
Im assuming this process is the same for a 2021 chevy silverado 2.7 8 speed custom.. Im not able to find the amount of fluid I should be putting in the transmission or the part #’s for the seal and filter. Did you confirm this information from the dealer or is this listed in the manual and I just missed it? Thanks
I got all my supplies at the dealer since it wasn’t widely available at the time. They told me how much for a pan drop. I also went on Amsoil for fluid level specs.
Compared to my 6 speed f150 your magnets have hardly anything on them. Look up 6R80 fluid change videos and you will see. I have a Chevy with the 8 speed now, thx for making the video.
Glad I could help. I didn’t find anything like this either, so I figured I could do this.
@@slowsmoothfastI see you labeled the drain plug as a drain plug only. Other videos show that to be the fluid level check plug. Obviously you can use it as a drain plug but what I’ve read and seen that you also use it to check the fluid level. Supposed to be done at 95-113 degrees after the thermostat cooler lines have opened if I remember correctly.
If i wanted to check the level of the transmission fluid only wothout dropping the pan , should i undo that same bolt u used to fill ??
Yes. Just make sure you’re able to touch it with your finger at the opening. It should actually dribble out a little.
I have 60,000 on mine should I flush it, it's a 2019 Chevy RST V-8 bought it with 35 and never done yet, I had a 97 Z-71 and did that at 70-80 with no issues,
My unprofessional opinion, I do not recommend a flush…ever. But if you wish, ensure you have a shop do it.
I only ever drain and fill with filter changes and I believe I had about 60k on mine.
Been watching these videos! Called dealership today and they quoted me 600 dollars for the fluid change yea no thanks
Yeah, same. I just go to the dealership for the fluid bc I couldn’t find it anywhere. Cost me about $150 and time to do it.
Seems weird but that's what it looks like at a true 50+ k miles. You just clean it up with break clean and your new filter and there is a additive from Delco for a refill for the trans issues. What pain in the a** that gm didn't just put a dip stick in from factory. Wow i hope you put truck back in park.looks if you said it was in park but it looked like it was in reverse 😉
Any issues after the change?
Gas is 4.00$ a gallon now
Great video ! Please if you can DM I have a question I need to ask seems like you more about these trucks I have the same truck but currently having an issue with it.
@@danielmontoya8137 what’s a good way to DM you?
@@slowsmoothfast
Ig: _dmx97_
@@slowsmoothfastI just did tranny service thanks to you I did it myself saved a couple hundreds lol. But yea I wanted to know what’s your trans temp now mine stays in between 200-210 that normal for these 8 speed 2.7s.
@@slowsmoothfast how can I reach you ?
@@danielmontoya8137 you have telegram or signal?
Where is the drain bolt located ?
I’ve been siphoning 4-5qts out through the dipstick hole lol
There is a small bolt towards the front of the drain pain. It will drain most of the fluid out. There is only about 7 quarts in the pan. You will still have residual fluid. The drain plug does not drain all the fluid.
Minute 3:50
that bolt on mine doesn’t drain anything unless it’s over full or cold maybe (never tried cold)
I know procedure to check it’s full is to get up to 130-140° and while running take the plug out till it stops dripping and you have the correct fluid level
So that same bolt will drain most of the pan if the trans is cold or not running?
@@Ls_swap211 weird. Mine started draining instantly. I did warm mine up. Don’t know if that makes a difference.
@@slowsmoothfast I’m gonna give it a shot
Siphoning takes as long as the hole oil change it seems so anyway I can speed that up is great lol
Did being stationed in Alaska suck, or was there any positive out of it😂
Alaska was fun. Lots of things to do. It is secluded from everything though.
Thanks for this video, I'll be taking on this task in about 20k miles. Has your shifting improved?
I haven’t had any hard shifts yet. With the older fluid, I was having some hard shifts periodically.
@SlowSmoothFast hoping I don't have all them metal bits?
Is it the same steps for a 3.0 ? Trying to do mine also
I believe the 3.0 comes with the 10 speed. But the process should be similar.
Covered under powertrain warranty.
Uh oh I’m at 78k miles 😮😢 gonna likely bring to the dealership to do as it cold up north here. 😢 big bucks wasted 😂 prob needs a lot more done to it by now too at closing in at 80k.
Yeah, it is what it is. Better than not doing it. Some of the other higher mileage maintenance items, differential and front diff if you have 4x4.
Bonjour peux tu me dire comment tu fais le niveau et combien de huile m'être merci
You need about 12 qts/liters of transmission fluid. Fill until it starts seeping out the fill hole.
Where is your exhaust hose? I dont see it in your video?
Exhaust hose on an automatic transmission?
my truck has exhaust hose crossing the tranmission pan. My truck is 2019 chevy trailboss 8 speed automatiic.
@@tuan-anhnghiem4344 Do you mean exhaust pipe? If that’s what you mean, then yes you would. You have a v8. I have the 2.7 turbo 4 cylinder.
U didn’t get all the fluid out
Dealer gives us dexron 6 ....wonder why yours is different
From what I’ve researched, dexron HP is the updated fluid Mobil formulated for the newer transmissions. It’s still Dex 6 compatible though.
@SlowSmoothFast it's because I have the 6 speed... the 8 speed I guess the revised the fluid
Yeah, fluid was revised for the 8 speed. Although, it is compatible with 6.
Now get the rest of the old fluid out and you should be good
Is it 4x4 ?
It is not 4x4.
Thank you for the video. Did you feel anything different with the transmission shifting after the oil changed?
The only difference I noticed is that it reduced the jerking. It didn’t happen all the time, but occasionally it would jerk into the next gear, primarily when cold.
What size is the transmission drain plug? Trying to replace mine with a magnetic one
Unfortunately, I cannot remember. I wouldn’t worry about a magnetic drain plug. There are two magnets in the pan already.