Figure I would post this hear as well since there are lots of 4l80e guys. 2005 5.3L, ls6 cam, GT45 turbo, 3.23 rear end.

Im noticing a slight chatter like the clutches are slipping when im coming off of idle. Seems to only do it around the 750-1750rpm range until I get up to like 5mph.

The 4l80e is a fresh rebuilt with an hd2 kit and all i have done on efilive is a segment swap, upped the shift points and added 5% to the 1-2, 2-3 and 3-4 line pressures.

Any ideas? It also doesnt seem to be locking up unless im logging the wrong pids. The converter seems to be a lot tighter also. It was spec'd i believe for a 427ci.

Is there a break in period until this gets looser? I have around 60km on the combo so far.

Im thinking maybe more line pressure is needed but im not to sure how to comprehend this in efilive. I've read about the force motor but also read to be very careful with this setting.

Jay