1977 GMC K25 C4 Shift Indicators

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

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.

Tech write-up and a video of a Lokar shifter install on an automatic transmission.

Learn how to install a side detent shifter in a 1969 Chevy C10.

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 about performing an LS Swap in a 1972 Chevelle in this tech article. We'll discuss lessons learned from our Chevelle engine swap using a 500-horse 6.0.

After installing a new cam in a LQ4 6.0 motor, it is now time to swap the lifters. Follow this step by step guide on how to prep and install LS7 roller lifters.

Steve takes us along as he centers the 525 manual steering gear he is using for his Laguna.

Learn how to swap out an LS engine with a modern fuel injected engine into a hot rod for added horsepower, fuel economy, or throttle response. View a list of parts and helpful tips to complete the installation.