Beefed Up 3.73 Gear Ratio Ring and Pinion Set for GM 8.5 and 8.6 Inch Differentials, 30 Spline Pinion, 10 Ring Gear Bolts, 8.50 Inch Ring Gear Diameter

Beefed Up 3.73 Gear Ring & Pinion for GM 8.5/8.6 Diffs
✔️ 3.73 ratio, 30-spline pinion, 8.50 inch ring gear diameter (216 mm), 10 bolts

This high-performance ring and pinion set is engineered for GM 8.5 and 8.6 inch differentials, delivering a 3.73 final drive ratio with a 30-spline pinion and an 8.50 inch ring gear diameter (216 mm). Includes 10 ring gear bolts for straightforward installation. Pack: 1 set.

✅ Fits GM 8.5-inch and 8.6-inch differentials with 3.73 ratio
✅ 30-spline pinion for strong engagement
✅ 8.50 inch ring gear diameter matches OEM spec (216 mm)
✅ Includes 10 ring gear bolts for straightforward installation
✅ High-grade steel gear surfaces reduce friction and heat for durability

💡 What is a ring and pinion gear set used for in a GM differential? A handy explanation of how swapping gear ratios affects torque and engine RPM. - Improves acceleration at lower speeds - Reduces engine RPM at cruising speed for better fuel economy - Needs precise backlash and proper installation for long life