Product Overview.
Upgrade your GM 8.875" 12-bolt differential with the EXCEL 12BT373 Ring & Pinion Set.
This set is engineered with a 3.73 gear ratio, balancing power, efficiency, and reliability for classic Chevrolet & GMC trucks and SUVs.
🔹 Features & Benefits: ✅ 3.73 gear ratio optimized for towing and daily driving.
✅ Standard rotation with a 12-bolt ring gear design.
✅ 30-spline pinion with an 11-tooth pinion gear for smooth torque transfer.
✅ 41-tooth ring gear made from premium 8620 steel for high durability.
✅ Direct fit for GM 8.875" truck differentials requiring a 3.73 & higher carrier.
🚗 Application & Compatibility: ✅ Fits Chevrolet & GMC Vehicles: Chevrolet C10, C20, K10, K20, Blazer, Suburban, G10, G20, P10, P20 (1964-1982) GMC C15, C25, K15, K25, Jimmy, Suburban, G15, G25, P15, P25 (1964-1982) 🔄 Replaces For: ✅ USA Standard Gear: 36175 ✅ Richmond Gear: 49-0280-1 ✅ Transtar Industries: 742J730C ✅ Motive Gear: GM12-373, GM12-373A ✅ Richmond Gear: SGM12T04 ✅ USA Standard Gear: ZG GM12T-373 🛡 Warranty & Why Choose EXCEL from Richmond?
Backed by a 1-year or 50,000-mile warranty, the EXCEL 12BT373 Ring & Pinion Set is engineered for durability, precision, and smooth performance.
Choose EXCEL from Richmond for premium differential gears designed for classic GM trucks.
Upgrade your GM 8.875" 12-bolt differential today with EXCEL’s high-performance 3.73 Ring & Pinion Set!
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