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

[@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.

[@JamesPinder-e6j]

Was out standing

[@texZR2]

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.

[@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. ;-)

[@MikeSanders-oo1oz]

Can you please list the tool you used to drive in the bushing you give the size I would like to get one? Thank you Mike

[@DrShock]

Thanks for pointing out that I missed adding that tool. It's in the video description now.

[@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.

[@shortcircuit3033]

Is there difference types of fluids..that can be used..i have a 2004 6.0 with a 4l80e..

[@DrShock]

It's just Dexron VI nowadays for the 4L80E/4L85E series transmissions. Originally, when the vehicles were newer it would have been Dexron III. But those blends are obsolete and no longer marketed anymore.

[@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 😅