Differential Contact Patch and Pinion Depth Explained

How to use a Pinion Depth Checker to measure pinion depth on all stand alone differentials that are not part of a transaxle. [More…]

This film was made in the 1930s and is the best explanation of how a differential works we have seen to date. [More…]

Does your rear differential leak gear oil everywhere? Do you keep installing a new pinion seal and having the same problem? Here’s the fix. [More…]