GM 4L60 700R4 4L60E Transmission Input Drum Reinforcement Kit Sonnax 77733-02K

Brand: Sonnax Type: Drum reinforcement kit Interchange Part Number: S74969-1K Manufacturer Warranty: Unspecified Length  Fitment Type: Direct Replacement Items Included: Reinforcement Sleeve and Overrun Piston inner seal Manufacturer Part Number: 77733-02K Surface Finish: New Drive Type: 4WD,AWD,RWD Material: Steel Performance Part: Yes 700R4 4L60 4L60E Transmission Input Drum Reinforcement KitPart No. 77733-02K fits all 700R4/4L60/E Models 1982-up 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. OE overrun pistons must be machined when using Sonnax input drum reinforcement kit 77733-02K. Sleeve made from hardened chromoly steel Can be installed in early- and late-model units* Sleeve design will not block clutch feed oil Note *Will not repair a cracked drum. Requires 96-earlier aluminum