GM 8.5 Inch 10-Bolt, Differentials

GM’s 10-bolt rear axle has been around since the 1960s, here’s how to determine if your junkyard find is worth taking home

Decode, ID, and upgrade your GM 12-bolt rear end. Learn axle specs, gear ratios, and best performance parts upgrades.

Steve provides a step-by-step guide to install the Speedway Motors GM 10-Bolt Polished Finned Aluminum Rear End Cover.

Learn how to ID a Ford 8.8 rear end by tag, width, and code. Compare 8.8 vs 9-inch axles, decode gear ratios, and find which Ford models used them.

Learn how to assemble one of our bolt on nine-inch Ford disc brake kits in this step-by-step guide.

Learn what gear oils do for your differential and how to choose the best gear lubricant for your application's needs

Need help with rear end identification for your muscle car or hot rod? Learn how to identify 9-inch Ford housings and how to measure your axles with our diagrams.

This resource contains a transmission pan shape ID chart and other tips to help with identifying GM transmissions.