4L80E Tear Down & Common Problems

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Published 2018-10-29

In this video, Curt goes through how to tear down a 4L80E. Then he talks about the common problems found in this transmission and the solutions to those problems. Most issues are seen when the transmission is overheating or is starved for oil. This can happen in early models because of the positioning of the coolant lines. Some drums can develop ring grooves from Teflon rings which would lose lubrication and cause the planetary to burn up. Finally, sometimes the clutches on the drum will slip and cause grooves in the drum which can cause the clutches to only apply partially or not apply at all.

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All Comments (20)

@norbertoperez6210 3 years ago

Thank you for showing me that I need save up and pay someone to do it.
@orlandoduran7740 2 years ago

good transmissions , i got 341k miles on my 05 silverado
@CanadaBud23 4 years ago

Such a simple trans, I thought they would be a complicated mess because they are fairly big. I think when I get my swap underway I'll pull apart the trans too.
@orlitorl 5 years ago

Yo make it look easy when you know your stuff... thank you for sharing...
@howitstartsmm 1 year ago

you sir are a great instructor, thanks for sharing your knowledge
@31144 4 years ago

Bentley put a 4L80e in their Arnage range (98 to 2002) biggest issue they had was it would lose reverse ! !
@timgiles9413 3 years ago

sounds like my 4L60E (2004 Chevy Trailblazer) is better. Curt is an awesome teacher :)
@pvcarmon1 5 years ago

Wonder if my rebuilder replaced the cooked or damaged drums with Chinese ones or just used the same ones or used OE ones who knows scard to ask.
@adamskikijowski9139 2 years ago

Phenomenal knowledge
@supertruckertroy 2 years ago

Mr. Curt Thank You for all the videos would never dare diving into one until now. I do have a question 4l80e put in reverse engine idles fine put in forward gear Engine dies like lock-up is engaging any fixes i could try before having to pull it out be great if there is any thank you
@redspeck 5 years ago

Yes, great video. You seem to know your trans.
@ladjkaoz 4 years ago

What about the solenoid leak... so I guess they are not as strong and good as he said.. my burn in daily driver no houling heavy stuff..
@paulalline6391 7 months ago

If I had my dad's old shop tools (the special pliers and presses) I'd dig into the one I'm pulling
@garyh30 5 years ago

Thanks homie
@gustavomelendez5514 3 years ago

Thanks
@josedominguez2021 5 years ago

Nice vdo thanks a lot!!!
@brianlundsr1489 3 years ago

I have a 2004 Sierra 2500HD with this trans. I pull an 8600lb 5th wheel. The truck had 200K miles when I got it. Attempted a trip to Texas yesterday with the camper when the trans got hot. We limped it back home, allowing it to cool before starting again. Never had issues before yesterday. What could cause this to suddenly happen?
@johnlittle1939 2 years ago

Yes Sir I need your help. I have 1994 motorhome with a 4L80E transmission. Can I replace it with a better version or i need to replace with the same year. Thanks for your cooperation great job.
@Redneck_4wheelers 1 year ago

What intro song is that i wish it kept going that was kick ass man 🤘🤘🤘