USA Standard Ring & Pinion Gear Set For GM 8.5in in a 3.90 Ratio

USA Standard Gear ring and pinion sets are designed to exceed OEM specification. All sets receive rigorous in-house quality evaluation to ensure products pass dimensional, material, and fitment testing.

• 8.50" ring gear diameter
• Fits GM 8.5" and 8.6"
• 10 ring gear bolts
• 30 spline pinion
• 3.90 ratio