Knowledge Center
Knowledge Center
Know Your Drivetrain.
Setup specs, break-in steps and gear calculators to help you pick the right ratio, install it right and make it last.
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Gear calculators
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Axle makers in our specs
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Break-in stages
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Tech line
Regearing? Start Here
1
Pick Your Ratio
Use the RPM and Tire Height calculators to see where your engine lands at cruise on your new tires.
2
Choose Your Gears
Shop ring and pinion sets, or save a step with a complete gear package.
3
Set It Up Right
Start from our published pinion depth, preload, backlash and torque specs.
Calculators
Calculator
Gear Ratio Calculator
Enter ring and pinion tooth counts to get the exact ratio of a gear set.
Calculator
RPM Calculator
See engine RPM at speed for a given gear ratio and tire height.
Calculator
Tire Height Calculator
Turn a tire size like LT325/65R18 into its actual height.
Install & Setup Guides
Setup
Differential Setup Specs
Pinion depth, bearing preload, backlash and bolt torque for GM, Chrysler, AMC, Dana, Ford, Toyota, Suzuki and Nissan.
Install
Gear Set Break In
Five stages from first drives to the 500 mile oil change, plus gear oil specs.
Upgrade
REM Surface Finishing
Optional in-house superfinishing for ring and pinion gears, available on request.
More From the Shop
Articles, Builds & Videos
Tech articles and build features on the blog, and install and shop videos on our YouTube channel.
Still Have a Question?
Our team knows drivetrain. Send a message or give us a call.