Sonnax K77898 Transmission Reverse Boost Valve Kit (Large Ratio, O-Ring Style) Featured Products 6R80 transmissions include torque converter

6R80 transmissions include torque converter clutch slip

Valve Body Detent Ball & Sleeve Kit

(1)  3-2 Downshift Solenoid

Includes everything pictured (cool box too

with Inner and Outer Races

Sonnax K77898 Transmission Reverse Boost Valve Kit (Large Ratio, O-Ring Style) Featured Products 6R80 transmissions include torque converterBrand: Sonnax Other Part Number: S74507RDK Type: Pump Component Items Included: Reverse Boost Valve and Sleeve with O Rings Manufacturer Part Number: K77898 Material: Steel Universal Fitment: Yes Vintage Part: No Performance Part: Yes 200 4R, 4L60, 700R4 Reverse Boost Valve Kit Part No. K77898 Large Ratio, O Ring Style Vehicles with GM 200 4R and 4L60 transmissions often have problems with poor Reverse boost or upshifts in manual low. These are