Sonnax TH350 Turbo 350 Boost Valve and Sleeve

Precision-engineered boost valve and sleeve assembly for the GM TH350 Turbo 350 three-speed automatic. This Sonnax component features precision-machined valve for improved shift firmness and reliability. A direct replacement for worn original parts or an upgrade for performance applications requiring firmer shift engagement.

The servo and accumulator components directly affect shift feel and firmness in the TH350 transmission. This boost valve and sleeve is manufactured to tight tolerances for consistent performance across all 1969-1986 GM vehicle applications. Essential for any rebuild where improved shift quality is desired.