I've searched trying to find an answer with no luck. The forward planetarys stripped out so I took the truck in to get the tranny rebuilt. After the rebuild the truck doesn't shift how it should. If you are at half throttle or under it shifts fine. If you are at 3/4 throttle or more the torque converter stays locked and slams 3rd gear hard. Pretty much everything in the tranny is new. New pump, valve body, clutches, torque converter, forward planetarys. So far on the truck the PCM has been changed, speed sensor in rear axle, cam position sensor, throttle pedal was switched with another trucks which didn't fix it. Any ideas what to look at next? The tranny has been tore down again since the original rebuild and he said everything was fine.