Input Drum Reinforcement Kit Contains Reinforcement Sleeve and Overrun Piston and Seals
PISTON KIT INPUT DRUM REINFORCEMENT
Warning:
This kit must be used with a ’97-later stamped steel forward piston, it cannot be used with '96-earlier aluminum forward piston or billet forward piston # 37586.
The GM 4L60, 4L60-E, 4L65-E and 4L70-E input drum assembly is known to crack and strip out splines where the input shaft is pressed into it (where the overrun piston rides). Sonnax offers a hardened steel sleeve that reinforces the input drum to prevent this failure. The Sonnax input drum reinforcement kit includes a custom manufactured overrun piston designed for use only with a stamped steel forward piston, eliminating the need to use aluminum forward pistons.
Custom overrun piston works with steel forward piston
Chromoly steel sleeve design will not block clutch feed oil
Universal design fits both early- and late-model units
Warning:
This kit must be used with a ’97-later stamped steel forward piston, it cannot be used with '96-earlier aluminum forward piston or billet forward piston # 37586.
The GM 4L60, 4L60-E, 4L65-E and 4L70-E input drum assembly is known to crack and strip out splines where the input shaft is pressed into it (where the overrun piston rides). Sonnax offers a hardened steel sleeve that reinforces the input drum to prevent this failure. The Sonnax input drum reinforcement kit includes a custom manufactured overrun piston designed for use only with a stamped steel forward piston, eliminating the need to use aluminum forward pistons.
Contents:
SONNAX Installation Instructions