Sonnax TH350 Pressure Regulator Valve Kit

Upgrade the shift quality of your TH350 Turbo 350 transmission with this Sonnax pressure regulator kit. This kit modifies the valve body hydraulic circuits to deliver firmer, more consistent shifts while reducing slippage and heat buildup. Compatible with all TH350 transmissions found in 1969-1986 Chevrolet, GMC, Buick, Oldsmobile, and Pontiac vehicles.

Includes detailed installation instructions with clear diagrams. No special tools required beyond standard transmission rebuild equipment. This PR valve upgrade is ideal for performance builds, tow vehicles, and any application where improved shift firmness and reliability are desired. A popular upgrade during any TH350 rebuild.