4R70W Street Engine Parts

There are a lot of choices when it comes to automatic shifters, and we’ll help unpack all the options and features in our automatic shifter buyer’s guide

Learn the importance of maintaining the right pressure in your tires for longer wear, enhanced handling and to get better fuel economy.

Speedway Motors was selected by Arrow Electronics to prepare Sam Schmidt’s vehicles for Optima’s Ultimate Street Car Challenge where he will race for the first time since becoming a quadriplegic in 2000.

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

Here's another one of our customer's cars, and this Chevelle has got the look!

This '70 Camaro is a race car with a license plate, delivering aggressive performance weekend after weekend. It also serves as a test mule for the Speedway Motors R&D team to try out new ways to go fast in a 50-year-old muscle car!

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

Speedway Motors announced today they will celebrate their customers and 70th Anniversary during Customer Appreciation Week, July 25-31, with discounts, giveaways and Cars & Coffee celebration.

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.

This old sedan was untouchable in the early 60's.