GM 8.625 Inch And 8.5 Inch Ring And Pinion Gear Set With 3.73 Ratio And Master Bearing Kit For GM 8.5 Rear 70 To 98 And Front 77 To 91 10 Bolt 8620 Steel Beefed Up Performance Upgrade For Street Ready Drivetrain

8.5in/8.625in Ring & Pinion Gear Set 3.73 Master Kit
✔️ 8.5in and 8.625in ring gears, 30-spline pinion, master kit

Upgrade your 10-bolt GM drivetrain with this sealed ring and pinion gear set and master bearing installation kit. This combo is a common upgrade for street-driven muscle cars and daily drivers, typically used on GM 8.5 inch rears (70-98) and front 8.5 inch axles (77-91).

✅ Gear ratio: 3.73
✅ Ring gear diameter: 8.5 in. / 8.625 in. (215.9 mm / 219.1 mm)
✅ Pinion shaft diameter: 1.626 in, 30-spline
✅ Master Bearing Kit compatibility: GM 8.5 Rear ('70-'98) & Front ('77-'91)
✅ Includes: matched ring & pinion, bearings and races, pinion seal, nut, ring gear bolts, pattern checking compound, thread locking compound, cover gasket, and shims

Dimensión	Inches	Milímetros
Ring gear diameter	8.5 in. / 8.625 in.	215.9 mm / 219.1 mm
Pinion shaft diameter	1.626 in	41.3 mm
Spline count	30	N/A

💡 What is a ring and pinion gear set with master bearing kit used for? It’s a handy upgrade for street-driven GM axles to improve drive quality and reliability.

💡 For this product, a long-tail FAQ helps customers: - Handy upgrade for GM 10-bolt 8.5 inch rear ('70-'98) and front ('77-'91) axles - Includes matched ring and pinion, bearings, seals, and installation hardware - Improves drive feel, pattern accuracy, and long-term durability on daily drivers