Mercury Comet 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.

How to replace sway bars in a Mercury Comet and the advantages that come with it.

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

Learn about 'Speedy' Bill's passion for pedal cars and how that has been passed down through generations in the Smith family. Jess also explains the step by step process to assemble Speedway's Murray Comet style pedal car.

Follow along as Product Guru Jeff K. talks about customizing a Comet Pedal Car for his son!

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

After receiving many inquires, Jess shares the wheel and tire combo on her coupe.

Speedway Motors employee Jess M. walks us through adding a little salt flat flair to her 1933 Ford coupe, by using moon discs and quarter turn fasteners.