GM 8.5 Inch 8.625 Inch 10 Bolt Ring And Pinion Set With 4.56 Gear Ratio 30 Spline Fits Chevrolet GMC Cadillac Buick Pontiac Oldsmobile Hummer Isuzu Built From 8620 Steel For Strength
✔️ 4.56:1 ratio, 30-spline, 8620 steel, OE direct-fit
Upgrade your GM 8.5/8.625-Inch 10-bolt differential with a precision ring and pinion set built for trucks and street/strip use. This direct-fit kit works with 2.73+ carrier ratios and replaces OE gear components to deliver smoother operation, stronger torque transfer, and longer drivetrain life.
✅ 8620 steel construction for durability
✅ 4.56 gear ratio for stronger torque and acceleration
✅ 30-spline pinion matches GM 10-bolt axles
✅ 8.5 in / 8.625 in axle compatibility with mm equivalents (215.9 mm / 219.1 mm)
✅ OE direct-fit design for easy installation and factory-like fit
✅ Fits Chevrolet, GMC, Cadillac, Buick, Pontiac, Oldsmobile, Hummer and Isuzu
✅ 1-year / 50,000-mile warranty
💡 What is a GM 8.5/8.625 10-bolt ring and pinion set used for in drivetrain upgrades?
- Increases torque transfer and improves launch response.
- Requires proper backlash, pre-load, and carrier compatibility.
- Works with 2.73+ carrier ratios in GM 8.5/8.625 diffs.
- Helps extend differential life with correct lubrication.