i have a level 2 t56 with a spec stage 3 clutch.it grabs great and the car accelrates perfectly but when im cruising on the hiway its fine when im on throttle,but when i let off it makes a rattling noise,when i touch the gas it goes away and then rattles again when i let off. other than that it runs great.. please anyone have anny suggestions?,..thanks in advance

 

Check torque arm. Had the same problem a d my stock arm was broken between the two bolts on top. The u joints where in a bind

 

This transmission is in a 1972 Chevrolet Nova. Eric L