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(1) Overdrive Sun Gear
Manufacturer Part Number: SK ALLISON-JR
The TCM also controls the apply and release of the torque converter clutch which allows the engine to deliver the maximum fuel efficiency without sacrificing vehicle performance
Alto Performance Kit includes:
NEW from OEM
Sonnax 77754-41 Transmission Shift Valve, 2-3 (Heavy Duty) 4L60E 4L65E 4L70E Rebuild Kit (1) Overdrive Sun GearBrand: Sonnax Other Part Number: S74741S 1HD Type: Valve Body Component Manufacturer Warranty: Yes Items Included: 2 3 Shift Valve Manufacturer Part Number: 77754 41 Universal Fitment: Yes Vintage Part: No Performance Part: Yes 4L60 E, 4L65 E, 4L70 E Heavy Duty 2 3 Shift Valve Part No. 77754 41 When the GM 4L60 E family of transmissions evolved from the 700 R4, the overrun clutch is no longer applied in 1st and 2nd when accelerating from a stop in D3
