77898E-6K sonnax 4L60E, 4L65E Boost Valve Kit .470" 1 groove Featured Products BTU Rating 15

BTU Rating 15

Can be converted back to automatic operation with minimal changes if desired

hardened billet stainless steel drain plug

4340 Shaft

This an premium repair pigtail including butt connectors and thorough instructions (see gallery)

77898E-6K sonnax 4L60E, 4L65E Boost Valve Kit .470" 1 groove Featured Products BTU Rating 15Brand: sonnax Type: Pump Component Manufacturer Warranty: Yes Items Included: Boost valve and sleeve Manufacturer Part Number: 77898E 6K Universal Fitment: Yes Performance Part: No 4L60 E, 4L65 E Transmission Boost Valve Kit Part No. 77898E 6K Early pump design, . 470" dia., factory style, no O rings with OE ratio GM 4L60 E and 4L65 E transmissions frequently have poor line rise, which can result in 3 4 clutch, 2 4 band failure or poor shift quality.