Sonnax 77898E-16K Boost Valve Kit 4L60E 4L65E 4L70E Late pump design, .472" dia Alto * Services bores from 1/4″

* Services bores from 1/4″ to 1″

Special Instructions: Requires transmission removal for proper installation

(1) Pump (Torque converter)

Fits 2000-05 Chevy GMC Duramax Applications

Note:  Bearings were removed from Allison packaging for this photo layout

Sonnax 77898E-16K Boost Valve Kit 4L60E 4L65E 4L70E Late pump design, .472" dia Alto * Services bores from 1/4″OE Spec or Performance Custom: Performance Custom Brand: Sonnax Interchange Part Number: S74507THK Manufacturer Warranty: No Warranty Items Included: Line Pressure Boost Valve Kit Manufacturer Part Number: 77898E 16K Country Region of Manufacture: United States Universal Fitment: Yes Vintage Part: No Performance Part: Yes 4L60 E, 4L65 E, 4L70 E Transmission Boost Valve Kit Part No. 77898E 16K Late pump design, . 472" dia., O ring style with OE ratio