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TREMEC S650 Input Shaft
Description
Direct-replacement input shaft for the ZF S6-650 6-speed manual, featuring a 23-tooth helical drive gear that meshes with the countergear for smooth, quiet operation. CNC-machined journals, splines, and locating faces are finished to OE-matched geometry for a clean drop-in during rebuilds. Made from SCM415 / SAE 8620 alloy case-hardening steel and carburized & quenched for a hard wear surface with a tough core. Commonly found on heavy-duty applications such as Ford Super Duty trucks. For best results, pair with the matching countergear and 1–2 synchronizer set and verify fitment by transmission tag.
Specification
Tooth Form / Count: Helical, 23T
Material: SCM415 / SAE 8620 alloy case-hardening steel
Heat Treatment: Carburized & quenched
Surface Hardness: HRC 58–62 (ductile core retained)
Manufacturing: CNC turning/milling; precision hobbing; edge-relief deburring; journals & locating faces precision-ground
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Model：ZFS6-16
