Input Shaft P/G Spline

The Input Shaft P/G Spline from Transmission Specialties is a precision-engineered component designed for Powerglide transmission rebuilds and upgrades. Built for mechanics and transmission specialists who demand reliability, this hardened steel input shaft handles the torque transfer demands of stock and modified Powerglide applications across all gear ratios. Whether you're restoring a classic muscle car or upgrading a street rod's drivetrain, a quality input shaft is foundational to transmission longevity and consistent power delivery.

This input shaft features a hardened steel construction that resists wear and spalling under load cycles, critical for maintaining spline engagement with the torque converter hub and internal transmission gears. The Powerglide spline design is engineered to universal specifications, ensuring compatibility across all ratio configurations without modification. At 2.22 lbs and measuring 13 inches in length, the shaft balances structural rigidity with minimal rotational inertia—key factors in efficient power transfer and reduced parasitic losses during acceleration and cruising.

Transmission builders and restoration shops rely on this component for full-rebuild applications, performing equally well in stock 200-horsepower applications and modified builds pushing 400+ hp through the Powerglide platform. Installation requires removal of the torque converter and pump assembly; proper alignment and torque specifications are essential to avoid premature spline wear. This shaft is sold individually, so verify your transmission's serial number and ratio before ordering to ensure correct fitment.