3rd/4th Synchronizer Hub & Sleeve (Mazda BT-50)

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3rd-4th Synchronizer Hub Sleeve Mazda BT50

Description

OE-spec 3rd/4th synchronizer hub and slider assembly for the Mazda BT-50 manual transmission. Precision-finished clutching teeth and broached internal splines, with ground faces and lead-ins, deliver stable blocking torque and crisp 2→3 / 3→4 engagements with reduced shift shock and noise. Manufactured from SCM415 / SAE 8620 alloy case-hardening steel and carburized & quenched to HRC 58–62 for wear and pitting resistance. Direct drop-in for rebuilds.

Specification

Toothing: Synchronizer clutching teeth (OD); internal spline to mainshaft

Tooth Count: 51/32T

Material: Alloy case-hardening steel SCM415 / SAE 8620 (or equivalent)

Heat Treatment: Carburized & quenched

Surface Hardness: HRC 58–62

Manufacturing: CNC machining; internal spline broaching; dog-tooth finishing & deburring; faces precision-ground