4L60E 4L65E Trans Boost Valve Early Pump .470" o-ring style Sonnax 77898E-4K Rebuild Kit (1) 152705D218PS Alto Performance Grooved

(1) 152705D218PS Alto Performance Grooved Apply Plate (0

Reduces or eliminates leakage in eroded OE bores

Front clutch burn-up (3rd) 3-4 neutral 4-2 kick-down runaway

By trusted American OEM Supplier Rostra

4L60E 4L65E Trans Boost Valve Early Pump .470" o-ring style Sonnax 77898E-4K Rebuild Kit (1) 152705D218PS Alto Performance GroovedBrand: Sonnax Manufacturer Warranty: Yes Fitment Type: Direct Replacement Items Included: Line Pressure Boost Valve Kit Manufacturer Part Number: 77898E 4K Material: Aluminum Universal Fitment: Yes Vintage Part: No Performance Part: Yes 4L60 E, 4L65 E Transmission Pump Boost Valve Kit Part No. 77898E 4K Early pump design, . 470" dia., O ring style with OE ratio GM 4L60 E and 4L65 E transmissions frequently have poor line rise, which can result in 3 4