A friend is rebuilding an AT545 for installation in a truck. After assembly the transmission moves the truck backwards in all forward gear selections and no movement in reverse. Can anyone direct me on repairing this? I hope it is a simple fix.

 

I started a new thread for you. I'm sure there is a simple fix for the trans but I would bet it requires a teardown and correct reassembly.

This one might make the history books, as it is not listed here as a common issue:

http://allisonparts.net/Allison-Tran...arts-Tips.html

 

Thanks for the new thread, I could not remember how I started one before.