1957 Chevy TH400 Transmissions

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

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

Decode small block Chevy engine suffix codes and block casting numbers with our SBC decoding info guide. Learn how to find and decipher your small block Chevy engine codes quickly and easily!

This is the amazing story of a 1957 Corvette that was built by GM as a factory-backed race car and test mule for the experimental Rochester Ramjet fuel injection. It won its class at Nassau and Daytona, then disappeared into a Chicago garage for 47 years.

In Dave Shuten's restomod revival, a '57 Bel Air gets a new lease on life.

Learn how Derek Turner's '55 Chevy gets completely overhauled with brand new chassis and suspension components along with a new fuel system and wiring.

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.

Originally purchased as a parts car Steve's '57 four-door hardtop is a true survivor that's been in the family for over 50 years.

Meet the 1957 Ford Fairlane with modern suspension, 560HP, and daily drivability—ripping autocross courses and cruising NC streets.

Learn about the G Force crossmember and how the symmetrical product design makes for a smooth installation on Jeff's 1967 Chevelle.