4.88 8.5in 10 Bolt GM

The 4.88 8.5in 10 Bolt GM by RICHMOND is a heavy-duty differential carrier assembly purpose-built for high-performance and tactical vehicle platforms requiring robust gear reduction and load distribution. This component is essential for operators and technicians working with light-duty to mid-range truck chassis in law enforcement, military logistics, and specialized vehicle operations. The 10-bolt configuration delivers reliable torque multiplication and durability under demanding field conditions where standard carriers fall short.

Engineered with Richmond's proven precision manufacturing, the 4.88 gear ratio offers aggressive acceleration and superior traction control—critical for payload-heavy tactical operations and off-road recovery scenarios. The 8.5-inch case design integrates seamlessly with GM 10-bolt axle housings, ensuring OEM-spec fitment and reliability. At 18.8 lbs, this carrier provides substantial structural integrity while maintaining balanced suspension geometry. The 10-bolt arrangement distributes lateral and rotational stress across multiple engagement points, reducing individual gear tooth strain and extending service life in high-torque applications.

This carrier is ideal for technicians and fleet maintenance personnel upgrading GM light-duty trucks used in tactical transport, command vehicles, or rough-terrain logistics. Installation requires axle disassembly and professional setup with proper bearing preload and backlash adjustment—recommended for certified mechanics with differential experience. Compatibility is limited to GM 10-bolt rear axle assemblies; verify your vehicle's axle code before purchase to ensure correct fitment and warranty coverage.