Willys Differential Bearings and Seals

This veteran of the legendary "gasser wars" of the 60s looks right at home in the Museum of American Speed.

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 brief overview of the steps Speedway Motors takes to ensure you get a quality differential.

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

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

How to clean and seal your old tank

Learn how to measure pinion depth with a ring and pinion setup tool. Follow as our tech Zach rebuilds a rear differential with the help of a pinion depth tool.

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.

Learn how to seal a head gasket properly! These tips will help you avoid blown head gaskets and head gasket leaks.