Transmission Slip Yoke N3R 32 Spline - GM TH400

The TCI Transmission Slip Yoke N3R 32 Spline for GM TH400 is a precision-engineered driveline component designed for high-performance and heavy-duty transmission builds. This slip yoke accommodates the longitudinal movement of the driveshaft while maintaining secure spline engagement, making it essential for both street and competition applications where transmission flex and shaft travel are critical considerations.

Constructed from steel with a natural finish, this 32-spline yoke measures 5.340 inches in length and is engineered to OEM specifications for TH400 compatibility. The 32-spline design provides robust load distribution and eliminates the binding issues that can occur with undersized spline counts in high-torque applications. Proper slip yoke selection is critical—an incorrectly sized or worn yoke can cause premature shaft wear, vibration, and transmission seal failure. The TCI piece is manufactured to tight tolerances to ensure smooth articulation and maximum lifespan in demanding conditions.

This component is ideal for builders and technicians performing TH400 transmission rebuilds, upgrades, and restorations—particularly in vehicles with custom drivelines, lowered suspensions, or increased torque output. It's commonly specified in muscle car restorations, drag racing platforms, and vintage truck builds where reliability and precise fitment are non-negotiable. When replacing a slip yoke, inspecting the transmission output shaft and driveshaft U-joints for wear ensures optimal performance of the entire driveline assembly.