Governor Recalibration K

The Governor Recalibration K from B and M AUTOMOTIVE is a comprehensive transmission governor rebuild kit designed for serious transmission enthusiasts and mechanics who demand precise shift control and responsiveness from their classic American automatic transmissions. This kit exists because governors wear over time—bushings compress, friction materials glaze, and seals deteriorate—causing sluggish, unpredictable shift points and loss of drivability. Whether you're restoring a 700R4 four-speed, rebuilding a legendary TH350, or overhauling a heavy-duty TH400, recalibration through fresh components is essential to restoring factory performance and extending transmission life.

The Governor Recalibration K contains all necessary friction materials, bushings, gaskets, and seals required to restore governor function to OEM specification. The governor is the heart of shift timing in these transmissions—it uses centrifugal force and fluid pressure to modulate shift schedules based on road speed and engine load. Fresh bushings eliminate side play and ensure precise valve movement; new friction materials restore the dampening characteristics that control governor response curves; and quality seals prevent fluid leakage that compromises governor oil supply. Each component in this kit is engineered to match original tolerances, ensuring smooth, repeatable upshifts and downshifts across the entire RPM range and vehicle speed spectrum.

Transmission builders, hot rod mechanics, and restoration shops benefit most from this kit when performing full rebuilds or addressing shift quality complaints on high-mileage vehicles. Installation requires governor removal and disassembly—a task best suited to experienced technicians with transmission expertise and proper tools. The Governor Recalibration K is compatible with 700R4, TH350, and TH400 transmissions across GM platforms from the 1960s through 1990s, making it indispensable for anyone serious about maintaining or improving shift performance in these bulletproof powerplants. For professional or enthusiast-level transmission work, this kit represents the difference between a generic rebuild and a precision recalibration that delivers predictable, factory-correct shift quality.