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USA Standard master overhaul kit for GM Chevy 55P and 55T differential rebuilds. Includes the core service components needed during rear-end overhaul work.
YDGGM9.5-33-1
Gear Dura Grip positraction unit for GM 9.5-inch rear axle applications with 33-spline axles. Built for classic muscle car, restoration, and performance driveline projects.
YDGGM12P-3-30-1
Gear Dura Grip positraction for GM 12-bolt passenger car rear ends with 30-spline axles and 3.08 to 3.90 ratio applications.
ZG GM55P-355
USA Standard Gear ring and pinion set for GM Chevy 55P differentials in a 3.55 gear ratio. Useful for rear-end restoration and driveline service.
