SKU: RAT315K
MPN: 315K
The RATECH Complete Kit (Model 315K) is a comprehensive differential installation package engineered for GM 12-bolt passenger car applications. This kit exists to simplify one of the most critical drivetrain rebuilds a mechanic or enthusiast can undertake—replacing or servicing a differential assembly. Whether you're performing a complete differential overhaul, upgrading gear ratios, or restoring a classic or modern GM muscle car, this all-in-one solution eliminates the frustration of sourcing individual components separately and ensures compatibility across all internal bearing and seal surfaces.
The Complete Kit includes pre-selected bearings sized for precise differential carrier fit, a crush sleeve to maintain correct bearing preload geometry, OEM-specification gaskets and seals that prevent oil weeping and contamination, stainless steel hardware calibrated to torque specs, precision shims for backlash and runout correction, and marking compound for gear tooth contact pattern verification. Each component is engineered to work together as a system—the bearing set tolerances, crush sleeve diameter, and shim stack all interact to deliver the tight, quiet operation that separates a professional rebuild from a compromised installation. The 5.78 lb package delivers everything except the differential cover and ring/pinion gear set, making it ideal for technicians who already have those components or are sourcing them separately.
This kit is essential for anyone performing a full differential rebuild on first-generation or later GM 12-bolt differentials found in Camaros, Chevelles, Novas, Corvettes, and full-size trucks. Shops performing posi-traction conversions, gear swaps, or bearing replacement will appreciate the time saved by having every gasket, seal, and hardware specification pre-assembled and verified for the platform. Installation requires standard differential service tools and bearing pullers; the marking compound allows you to verify proper gear mesh before final assembly, ensuring quiet operation and maximum component life under load.
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