For sale Sonnax Reverse Boost Valve Kits K77898 in UAE, DubaiListing #402525

Vehicles with GM 200-4R and 4L60 transmissions often have problems with poor reverse boost or upshifts in manual low. These are generally caused by a worn reverse boost valve sleeve or wear at the pump body. Sonnax offers a larger ratio (.283 in.) reverse boost valve kit to restore the hydraulic integrity of the assembly. Due to the differences in the thermal expansion rate of steel and aluminum when the transmission approaches operating temperature, the sleeve has been allowed excessive clearance and scrubs the bore. Additional details: * Sleeve O-rings seal the reverse bo