lxcoupe

iTrader: (9)

Hey all I've got a craigslist 80E that I put a Transgo HD2 into, also running a 258mm single disc Circle D stall. The truck drives and shifts totally normal. I've disabled torque management. But at, I would say, 50% throttle or above if I am accelerating, the 3rd to 4th shift feels fine, and then right before the converter locks the rpm's flare 2-300rpm. It's actually quite subtle and I didn't really notice it for months. I loaded a completely stock 80e segment and it still does it. I'm thinking it might be one of the solenoids, because I came across this thread:

4L80E shift to OD then engine RPM flare - Hot Rod Forum : Hotrodders Bulletin Board

Anyone experience this? I'm about to put the turbo on and any quirks or issues will become magnified!

lxcoupe

iTrader: (9)

Disabling PWM and making other adjustments to converter lockup seems to have fixed the problem. In case someone does a search in the future, I highly recommend using this guide to do a baseline trans tune:

How To: 4L60/65E trans tuning. Shifting/TCC/TM (w/ Pics))