2001 GMC 2500HD 4L80-E Reverse servo extension for a quick fix to get back on the road without pulling the transmission out and down. This is not a permanent fix, but should get me through the season. NOT A PROFESSIONAL … might not be the proper and professional way to repair… but at -30 deg …. It will get you home!
Thanks to:
Broncocarl92 for his superior tool fabrication and explanation video
https://www.youtube.com/watch?v=iklF2USrnr0
Automatic Transmission for the teardown and in-depth look at the internals of a 4L80
https://www.youtube.com/watch?v=-7A0VN3Cyws
WIT Transmission Parts, Inc. for their parts available, parts breakdown and parts diagrams.
https://www.wittrans.com/parts?&type=4L80E¬Pictured=1
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I’m loss of R and 2 Fix Transmission in taho 4L60e wat you’re prablem??
You don’t need to drop the valve body to change the rear band servo.
When i lost my reverse today, i seem to have also lost my third gear and over drive. Any guesses?
Works for me