Motive Gear 12BT410T Ring and Pinion Gear Set GM 8.875" 12-Bolt Truck 4.10 Ratio

The Motive Gear 12BT410T is a high-performance ring and pinion gear set engineered for GM 8.875-inch (12-bolt) truck differentials. This gear set features a 4.10:1 ratio, making it an excellent choice for restoring power and performance when running larger tires or improving acceleration and towing capability.

Key Specifications:

• Application: GM 8.875" (12-Bolt) truck differential
• Gear Ratio: 4.10:1
• Ring Gear Design: Thick ring gear configuration
• Pinion Diameter: 1.438 inches
• Pinion Spline: 30-spline
• Ring Gear Bolts: 12-bolt pattern
• Carrier Requirement: Fits 2.73 to 3.42 ratio carriers (3-series carrier)

Construction and Quality:

• Forged from heat-treated 8620 steel for maximum strength and durability
• Precision CNC machining ensures proper tooth contact and quiet operation
• Computer-controlled heat treatment for consistent hardness
• Designed for both street and off-road applications

This thick ring gear design is specifically engineered to fit lower numerical ratio carriers (2.73-3.42). Compatible with GM trucks including Blazer, C10, C15, K10, K20, and G-series vans from 1963-1982. Note that 1963-1964 models require a 30-spline pinion yoke. Professional installation with proper setup and break-in procedure is recommended for optimal performance and longevity.