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Description

The WT297-16D is a high-performance input shaft designed for Muncie M21/M20 4-speed transmissions (1971–1974 models). It features 26 helical teeth and a 26-spline shaft for precise fitment with the clutch and mainshaft. Made from SCM415 alloy steel and heat-treated to HRC 58–62, it offers excellent durability, wear resistance, and torque stability. Ideal for close-ratio setups in muscle cars, performance upgrades, and aftermarket repairs.

Specification

Gear Type: Helical Gear

Tooth Count: 26 / 26 / 36T

Material: SCM415

Heat Treatment: Carburized & Quenched

Surface Hardness: HRC 58–62

Overall Length: Approx. 265 mm (subject to actual measurement)

Gear Outer Diameter: Approx. 36 mm

Spline End Outer Diameter: Approx. 25 mm

Weight: Approx. 1.74 kg