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4L80-e 2002 model in c3500hd 8.1 truck reverse problem

sweetk30

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truck has just over 100k rolled week ago . trans has been out before i got it as its reman and talking with @Greg Ducato he said that had problem back in the day in these trucks and a lot got a reman unit .

it drives fine and no problems . but backing up it shutters until it grabs good and i called greg he was out of the office . but one of his guys said most common item is reverse band and this requires tear down of trans .

any tips or pointers before i pull trans and have trusted local trans shop do the work only cause greg is way to far away from my area and shipping would kill the deal .
 
I think the piston that pushes on the reverse band is accessible just under the pan.
Has seals around the outside that can crack/ get hard. iirc.
 
This.Screenshot_20260922-223450~2.jpg
Watch vids on it. It's a pain to get out, but CAN be done without pulling the valve body.
What it looks like inside Screenshot_20260922-223705.png
 
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