Sonnax

77733-01K

Sonnax Input Drum Reinforcement Sleeve, Seal & Piston Kit

Hard Parts

The GM 4L60, 4L60-E, 4L65-E and 4L70-E input drum assembly is known to crack where the input shaft is pressed into it (where the overrun clutch rides). Sonnax offers a hardened steel sleeve that reinforces the input drum to prevent this failure. No machining is required to use Sonnax input drum reinforcement kit 77733-01K. Features & Benefits • Sleeve made from hardened chrome-moly steel • Includes a reworked OE piston and O-ring • Can be installed in early- and late-model units* • Sleeve design will not block clutch feed oil

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