1991 - 2009 GM 4L80E & 4L85E Transmission Fluid, Filter, & Filter Seal Replacement Maintenance

In this regularly scheduled maintenance video we will be going thru draining and replacing the automatic transmission fluid (ATF), replacing the fluid filter, and replacing the fluid filter seal on the GM 4L80E and 4L85E automatic transmissions. The fluid, filter, and seal replacement service interval on these transmissions is every 100K miles of normal service, or every 50K miles of extreme service.
The transmission illustrated is a 1998 model year version, but the procedure will be the same for any 1991 thru 2009 4L80E or 4L85E Turbo Hydra-matic transmission. The filter part numbers for 1991 thru 1996 are different however, than 1997 thru 2007. While I list both versions below, I only show the 1997 and up versions in the video.
The eBay and Amazon search links below are paid links, for which I may be compensated and earn a commission, if you choose to buy the parts and tools shown in this video thru them:
1997 and up ONLY year specific transmission parts
GM 24210956 filter and seal kit: ebay.us/ixtfN4 or amzn.to/487FX8U
GM 24239049 fluid pan magnet: ebay.us/2xe2G7 or amzn.to/48fyfK3
GM 8677743 fluid pan gasket: ebay.us/V4U9Dh or amzn.to/3SVgH1q
1991 thru 1996 ONLY year specific transmission parts
GM 24236799 gasket, filter and seal kit: ebay.us/F78HXg or amzn.to/3UBtlUg
GM 8654799 fluid pan gasket: ebay.us/lJRrz9 or amzn.to/42y4BOV
GM 29535617 fluid pan magnet: ebay.us/nbL7oz or amzn.to/3SRFiE6
Parts common to ALL model year transmissions
GM 24233099 service pan drain plug: ebay.us/XGQoLk or amzn.to/3UCr7Eh
GM 24231519 fluid pan to case bolt: ebay.us/8h4UN1 or amzn.to/3uuJpg5
Lisle 17892 transmission drain pan: ebay.us/22Rgca or amzn.to/3HTNrBR
Flotool 05034MI extra large funnel: ebay.us/gdmD5F or amzn.to/3STB7Ym
GM 88865602 / ACDelco 10-9395 DEXRON VI automatic transmission fluid (gallon): ebay.us/BhA2Fi or amzn.to/49tB0sb
GM 88865601 / ACDelco 10-9394 DEXRON VI automatic transmission fluid (quart): ebay.us/khWso4 or amzn.to/3OEeO6C
GM C/K truck factory service manual: ebay.us/E5CJfJ
And if I've saved you some $$ here, consider some coins for the coffee tip-jar! ko-fi.com/drshock
1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
Chapters:
0:00 - Procedure overview
0:28 - Draining the fluid
3:04 - Removing the pan and pan gasket
10:15 - Removing the fluid filter
10:42 - Removing the fluid filter seal
13:20 - Cleaning and surface preparation
15:40 - Installing the new fluid filter seal
16:49 - Installing the new fluid filter
17:28 - Reinstalling the fluid pan and pan gasket
20:48 - Service manual information
22:59 - Adding the ATF and checking the level
#drshock #obstruck #obstrucks #4l80e #4l85e
Disclaimer: DrShock, the alias for the human content creator for this UA-cam channel, is not responsible for any damages, injuries, losses, or liabilities associated with any repairs, upgrades, or maintenance performed on yours, or any other, vehicle whatsoever. No warranty, express or implied, is made as to the accuracy or completeness of any information provided within this channel. Viewing and using the “as-is" information of this channel is totally at your own risk. Always wear personal protection equipment and follow appropriate vehicle manufacturer service manual guidelines with original manufacturer parts only when performing any repairs, upgrades, or maintenance upon any vehicle.

[@MikeSanders-oo1oz]

Thank you again Dr. Shock your videos are perfect for me. My son' was given a '97 GMC K2500 and you have walked me through front and rear brake repair, Kelsey Hayes ABS replacement, Upper and Lower Ball Joints, Master cylinder/Brake Booster and and most recently the rear axle fluid replacement. Now I will work this project in, you have saved me so much and I know my son is driving something that is so much safer and reliable now. I took High School auto mechanics in '82-'83 and I've done more on this truck then those two years with your superb videos and awesome detail.

[@db5235]

Always good content.
Did a search on your videos, and about the only thing that is not posted is engine mount replacement.
Not many videos of that procedure for the GMT 400's.

[@creverett9]

those access holes are cool never even knew about them. however I feel if these vehicles ever had a transmission or engine removal or both those bolts probably don't quite line up as well anymore. Something to thinking about to aide in helping me check if those services have been done before.

[@andyvaldez2830]

As always I appreciate the detailed content. I wonder do you have any experience diagnosing a P0758 code for these transmissions? The code reads shift solenoid b however I have tested both solenoid a and b and they both read around 22 ohms which is within spec.

[@Neil5.0lx]

Thank you for posting this video,i have 98 c2500 p'up with 4L80E trans.just did a trans.service.I check the fluid level while the engine running.You check the level with the engine off.which is the right way of checking the level?

[@DrShock]

Thanks. I mentioned in the video, it's about the temperature, rather than whether it's running or not. Either way is fine imo, if it's at temp. Easier to check with it running of course, unless you're making a video and need to narrate over the engine noise. ;-)

[@dr.peppertruck1817]

I tried to do a trans service on a 95 Cheyenne 3500 that’s been sitting since 2011 and the fluid is spitting back out at me and won’t go down weird

[@WingspeedGarage]

If I service my own vehicle and it has a pan with no drain plug I drill a hole to drain it and throw it away 😅 Then installing a cast aluminum pan with a o-ring seal 😅