GM B-Body Valve Locks

Learn what a manual valve body can and cannot do for your automatic transmission and performance driving needs

How proportioning valves work, fixed vs adjustable valves explained, and how to reset a prop valve.

Need a little help Identifying GM Body Styles 1964-1972? Click Here!

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

In this Tech Tip, John makes a few suggestions on how to deal with the classic problem of a Flathead Ford, vapor-lock.

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

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.

Choosing new wheels for a GMC Chevrolet truck. This project uses Speedway Motors GM Rally Wheels and new tires to enhance the appearance of the truck.

Learn about GM alternator identification in our guide. We cover GM 3 wire alternators, 1 wire alternators, and externally regulated so you know what to choose.

A properly bled brake system ensures optimal braking; here’s how to do it right the first time all by yourself