I've upped the TCC pressure to 1000 kpa and upped the slip ingagement 30% as well as setting max/min tcc duty solenoid to 100 % and 0%. I'm running 8 psi on an LS1 with 212 @ .050 camshaft and head work. I was sucessfully ramping on the dyno with the conveter locked when it started to jump in and out (perhaps just hot). How high have people pushed the stock converter in a 4L80E?

Cheers