Ford Full-Size Differential Third Members

Lucas P. explains how to choose the correct part for a Ford 9" third member build in order to achieve a bulletproof rear. You will find specific recommended parts to use from Speedway Motors.

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.

A full floating rear end is not just for dedicated track cars anymore. Many high horsepower street cars will be well suited to make the move to a Grand National style full floating axle. Read on to see why.

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