Wont change into 3rd at full throttle , hits limiter , have to lift throttle and will change.
Drives perfect at all other throttle positions and speeds.
Will change into 3rd at full throttle after rolling kickdown.
Its a built low km trans with new shift solenoids, extra clutches etc. Just a mild LS1 with 370-380 rwhp, previous built trans had the same issue.
Ive tried everything you can think of, different ecu, the lot. Only thing i havent tried is speed sensor and different OS in the tune.
Your 3>2 downshift speed is higher than your 2>3 upshift speed from 87% throttle and up. Your Full Throttle Shift speeds need adjusting also, they are similar. You need to have your downshift speed lower than your upshift speed. If its on a stock converter that should do. If it's still hitting the limiter, you might have to lower your upshift speed so it starts to shift sooner before hitting the limiter. But fix your 3>2 shift speed first.