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

How to Identify GM Transmissions | 700R4, TH350, 4L60, TH400, 4L80e, Powerglide, & More

Wiring of your race car or hot rod can be completed at home with these helpful automotive 12 V wiring tips.

How to Wire a Race Car | DIY Wiring Harness 101

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.

700R4 Transmission Complete Guide | Diagrams, HP Ratings, FAQ

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

Replacing Sway Bars in a Mercury Comet

Electrical wiring is one of those tasks that enthusiasts dread tackling on their own. We're here to tell you that wiring your project vehicle is something you can do with a little help from your friends at Speedway Motors!

The Best Wiring Solution for Your Hot Rod or Muscle Car Project

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

How to Adapt LS Engine to 700R4 or Turbo 350 Transmissions

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.

Murray Comet Pedal Car Assembly

Speedway Motors just added some exciting new options to our line of racing harnesses.

New Racing Safety Products from Speedway Motors: Harnesses

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

Rocket Racing Wheel and Tire Combo

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.

Moon Discs Courtesy of Quarter Turn Fasteners

Engine Family Facets

707063f6-5cf0-44d1-8e1f-49059e48addf

3fe4cfeb-d42e-4b60-a312-2940d324f962

Mercury Comet 700R4 Muscle & Classic Car Transmission Wiring Harnesses

Mercury Comet 700R4 Muscle & Classic Car Transmission Wiring Harnesses | Speedway Motors

Shop Mercury Comet 700R4 Muscle & Classic Car Transmission Wiring Harnesses and get Free Shipping on orders over $175 at Speedway Motors.

Mercury Comet 700R4 Muscle & Classic Car Transmission Wiring Harnesses

Brand

Discounts

Price

Products

Holley 558-473 Chrysler 46RE Trans Control Harness, Term X Max