Truck 31 Differentials

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

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

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

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.

In this Tech Tip, John answers a customer concerns about adding additional drop to his 1960-1972 Chevy truck.

This resource contains a transmission pan shape ID chart and other tips to help with identifying GM transmissions.

Get more details on Project Chevelle's 9-inch housing, third member, and tubular control arms installation.

Read how to lower the front of your 92-98 Chevy pickup using a DJM lowering kit. These tips are helpful for smooth completion.

Here's our attempt to do the impossible: pick a favorite GM truck design!