1948 Willys 4-63 Pickup Transmission Parts

A real-world guide to 4L60 transmission specs, strength, and swap tips.

Speedway Motors, a manufacturer, retailer and distributor of high-quality automotive parts and racing products, announced today new products now available on their website.

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.

Learn how Zach replaces a transmission and breakaway converter in his 55 Chevy, with some helpful tips along the way.

Exlpoded View of the Bert 1300 Late Model Racing Transmission

In this Tech Tip, John offers up a couple solutions to a customer wanting the best electric option to fuel his project.

Learn how to replace a fuel sending unit. Our fuel gauge sending unit guide and installation video covers all you need to match your fuel sender and gauge.

Speedway Motors, a manufacturer, retailer, and distributor of high-quality automotive and racing products, will feature a variety of new products and build projects in their booth (#23693) at the 2026 SEMA Show Nov. 3-6 in Las Vegas, Nev.