Tri-Five 4L60E Driveline and Axles

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

Easily calculate the best axle ratio or tire size for your build. Use our axle ratio calculator to match RPM, gear ratio, and tire diameter for optimal performance.

Need better tire traction on the track? Read our guide on increasing traction with grooving, siping, and needling to ensure your racing tires have great grip.

Should you mix bias-ply and radial tires? Get all the information you need with our guide on radial tires and bias ply tires, and why mixing is risky.

Dive into some of the history and unique differences between Ford and Chevy spindles for solid front axles and what will perform best on your hot rod.

In this Tech Tip, John answers a customer question about finding the right axle length for his 1931 Model A.

Need help with rear end identification for your muscle car or hot rod? Learn how to identify 9-inch Ford housings and how to measure your axles with our diagrams.

We’re putting Weld Racing Wheels and tires on our 410 Sprint Car and finally dropping it on the ground. Check it out!

In this video, we go through the process of measuring and cutting 9" Ford axles.

With the new housing and brakes installed, Jeff chooses new wheels and tires for his 1967 Chevelle. See how he gets the perfect fit with enough clearance for brakes, coilovers and even 15" wheels.