Motive Gear 49-0034-1 Ring and Pinion Set GM Ratio - 8.5 8.6 10-Bolt 3.90

The Motive Gear 49-0034-1 is a ring and pinion gear set engineered for GM 8.5" and 8.6" 10-bolt rear axle assemblies with a 3.90:1 gear ratio. Motive Gear is a trusted name in drivetrain components, manufacturing ring and pinion sets to OEM tolerances or better for reliable street and performance applications.

This gear set is precision-machined from high-strength steel and heat-treated to ensure consistent tooth contact, long service life, and quiet operation under load. Whether you are restoring stock gearing or re-gearing for improved towing capacity and acceleration, this ring and pinion set is a direct-fit replacement for compatible GM axle applications.

Key Features:

• Application: GM 8.5" and 8.6" 10-bolt rear axle
• Gear Ratio: 3.90:1
• Material: High-strength alloy steel with heat-treated gear teeth
• Precision ground for accurate tooth contact pattern and quiet operation
• Sold as: 1 ring and pinion set (1 pack)
• Manufactured to meet or exceed OEM specifications
• Compatible with OEM and aftermarket differentials for the listed axle family

The Motive Gear 49-0034-1 is an excellent choice for performance builds, daily drivers, and work trucks requiring a re-gear to a 3.90 ratio for optimal power delivery and drivetrain efficiency.