64-67 GM A-Body Valve Locks

Learn what a manual valve body can and cannot do for your automatic transmission and performance driving needs

How proportioning valves work, fixed vs adjustable valves explained, and how to reset a prop valve.

Learn how to choose the right valve springs for your camshaft, the differences between single and dual valve springs and when to replace them.

Learn how to install a Line lock as well as installing a line lock button and how a line lock works, with Kevin as he goes through the process on his '54 Chevy Belair.

Need a little help Identifying GM Body Styles 1964-1972? Click Here!

Today we take a look at the differences between proportioning valves (both fixed and adjustable models) and the residual pressure valves we offer in this buyer's guide.

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.

Jess M. talks a bit about the locking lug nut set from Gorilla Automotive Products that she installed on her 1933 Ford coupe to help keep her new Rocket Racing Wheels safe.

A properly bled brake system ensures optimal braking; here’s how to do it right the first time all by yourself

Use our brake builder tips and product info to create the perfect brake system for your project vehicle needs