NASA P/G Input Shaft w/Turbo Splines & Rings

The NASA P/G Input Shaft w/Turbo Splines & Rings is a precision transmission component engineered for builders and mechanics upgrading or rebuilding Powerglide transmissions. This input shaft serves as the critical link between your engine's torque converter and the transmission's planetary gearsets, making it essential for anyone serious about maximizing power transfer in high-performance applications. Whether you're restoring a classic hot rod, building a competition drag car, or upgrading an existing Powerglide setup, this NASA shaft delivers the durability and compatibility needed for reliable operation under demanding conditions.

Manufactured from high-grade steel by Transmission Specialties, this input shaft features NASA-spec turbo splines and rings that ensure positive engagement with both the torque converter and transmission internals. The turbo spline design provides superior holding power compared to standard splines, reducing slip and improving efficiency under load—a critical advantage in turbocharged or supercharged engines where converter multiplication is maximized. The precision machining and robust material selection mean this shaft handles higher horsepower levels without wear or spline degradation, maintaining shift quality and power delivery consistency over thousands of miles.

This component is ideal for TH350-spline Powerglide conversions and OEM Powerglide rebuilds where original or equivalent shaft quality is non-negotiable. Installation requires transmission removal and partial disassembly, making it a perfect addition to a complete rebuild kit or performance upgrade package. Verify your existing transmission ID and spline count before ordering to ensure compatibility with your specific application—the NASA designation and turbo spline specification make this shaft a premium choice for builders who refuse to compromise on transmission reliability.