I've been searching for a 4L80E stock file on OS 01250003 for a while and so far no luck. I found a few old threads that had some info, but no 4L80E's. Trying to finish a transmission swap on a Firebird and thought I would ask if anyone has a file archived they could maybe share. Trying to avoid a whole OS swap if I can. Thought I'd give one last try in case someone had a file. Thanks for your help in advance!