AC 700R4 Driveline and Axles

The 700R4 is a great choice when it's time to upgrade your classic car or truck with an overdrive transmission. Here's what you need to know about GM's famous 4-speed automatic.

Follow along as Jeff installs an early 700R4 transmission for the big block in his 1967 Chevelle. See how this unit is upgraded and converted to a later 30 spline style.

We show you how to keep that old GM transmission when swapping in an LS engine. Our LS swap adapter kits make it easy!

Our hot rod expert takes you through his ford I beam axle setup. Follow as he sets up the front end on his split wishbone front suspension Model A.

In this Tech Tip, John answers a customer question about finding the right axle length for his 1931 Model A.

In this tech article, we show you how to measure the working angles on your drive shaft to ensure long life out of your U-joints.

We will show you the differences among traditional I-beam and tube axles and suspension designs used on hot rods; the differences between cross and traditional steering, measuring for springs, what spindles to choose, and much more.

In this Tech Tip, John helps to sort out some fresh suspension for a customer’s ’70 Nova.

Speedway Motors employee Steve L. takes a few minutes to talk about the various straight axle and radius rod options available at Speedway Motors.

With the coil-overs attached, it is now time to make the Chevelle rear whole again. Follow along as Jeff installs a 9" third member and spline axles with a few tips on axle lengths and bolt patterns.