B&M Differential Covers

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

The pros and cons of a welded diff vs open diff, plus what to know before learning how to weld your differential.

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

A short article explaining the main differences between open and limited slip differentials.

Comparing open diff vs limited slip vs locker differentials. Learn how each works, pros and cons, and which is best for your build.

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

We help determine what are the best 10-spline quick change gear ratios for your street or racing needs

Learn about the power behind the G-body platform and the steps to upgrade a 7.5" bolt rear end to a 8.5" to withstand high horsepower. See how to change the differential fluid and install new gaskets.

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

Quick change rears have been around since the 1940s and while many are familiar with them, to others they’re a mystery we’ll help explain