Spider Gears GM 2000-up 8.6in 30-Spline Kit

The Spider Gears GM 2000-up 8.6in 30-Spline Kit from Yukon Gear and Axle is a complete differential spider gear assembly designed for GM 10-bolt rear axles manufactured from 2000 onward. This kit exists to provide a direct replacement or upgrade path for operators and enthusiasts who demand reliable power delivery under demanding conditions—whether that's heavy towing, off-road work, or tactical vehicle applications. The spider gear set is the heart of any open differential, responsible for transmitting engine torque to both wheels while allowing speed differentiation during cornering.

This spider gear kit includes all necessary hardware: precision-manufactured spider gears, pinion shaft, washers, and fasteners engineered to OEM specifications and tolerances. The 30-spline configuration matches the GM 10-bolt carrier design, ensuring proper engagement and load distribution across the gear mesh. Yukon's spider gears are manufactured from high-quality alloy steel and heat-treated to withstand sustained torque cycles without premature wear or failure. The 8.6-inch carrier size is standard for full-size GM trucks and SUVs, making this kit compatible with a wide range of platforms from the 2000 model year forward. Proper installation requires removing the differential cover and existing spider gear assembly, a task well within the capability of any mechanic with basic axle service experience.

This kit is ideal for owners of 2000+ GM full-size trucks (Silverado, Sierra), SUVs (Tahoe, Yukon), and commercial vehicles relying on 10-bolt rear axles. It suits both preventive maintenance—replacing worn spider gears before catastrophic failure—and routine differential servicing. The lightweight design at 4.6 lbs minimizes rotating mass while maintaining structural integrity under heavy loads. Installation pairs with fresh differential fluid and a new cover gasket for optimal performance and seal integrity. Verify that your specific vehicle uses a GM 10-bolt carrier with 30-spline configuration before ordering, as compatibility is model-specific within the GM lineup.