i have a 4l60e with a trans go shift kit and vette servos. the 1-2 shift is way too rough. after several trans rebuilds ive decided to settle it down a bit. ive read a few threads and discovered that by removing 2 washers in the 1-2 accumulator it will still be firm but not rough. if anyone knows more about this or can help let me know. i will be dropping the pan this evening. i know its short notice but this is the only time i got. i will have my laptop with me so reply or pm me. thanks

 

Moved to the GM drivetrain forum for you. Yes, one or no washers at all will calm it down a bit. With one washer on a stock converter it was too harsh for me.