Th350c Lockup Transpak

The B and M AUTOMOTIVE TH350C Lockup Transpak is a precision shift kit designed to enhance the performance of 1980–1986 Turbo 350 automatics. This compact, bolt-in modification kit is ideal for drivers and mechanics looking to improve shift firmness, reduce slippage, and achieve faster torque converter engagement without a complete transmission overhaul. Whether restoring a classic muscle car or upgrading a daily driver, the Transpak addresses common limitations of stock TH350C units.

This transmission shift kit recalibrates internal pressure schedules and valve body hydraulics to increase shift force and accelerate torque converter lockup timing. It modifies shift feel without altering gear ratios, ensuring compatibility with stock final drive ratios and driveline components. The kit is designed for straightforward installation during routine transmission service.

Mechanics and enthusiasts working on 1980–1986 TH350C-equipped vehicles—including Chevrolet, Pontiac, Buick, and Oldsmobile models—will find the Transpak an effective solution for enhancing transmission performance. Its design focuses on improving the driving experience by eliminating the vagueness common in aged stock valve bodies.