TREMEC Toolbox App

The TREMEC Toolbox App for iOS and Android smartphones will help you simplify driveline setup, predict the effects of changing gear ratios and tire size, and calculate vehicle speed and RPM variables.

This Toolbox is great for planning your rig, allowing you to see what kind of performance to expect from different combinations!

The TREMEC Toolbox contains:

1. Driveline Angle Finder.

Take the guesswork out of your chassis setup with this handy 3-step tool!  By using your smartphone as a measuring device, the app will calculate each u-joint angle and provide an overall driveline operating angle with a Pass/Fail response.


This unique tool will help you avoid vibration problems associated with incorrect driveshaft and u-joint working angles.

The three-step graphical interface provides measurements essential for proper driveline setup, along with tips and instructions that make it possible to check angles like a pro! Designed for RWD vehicles equipped with a one-piece driveshaft.

2. Vehicle Speed Calculator

Interactively determine your vehicle’s speed in any gear and any engine RPM for best performance. You can alter the axle gear ratio, the transmission gear ratio and tire size to see the impact in real-time. As an added bonus, the Vehicle Speed Calculator doubles as a Gear Ratio Calculator.

3. RPM Calculator

Determine what RPM your engine will run based on gear ratio, tire size, transmission and MPH. Try various combinations to come up with the best combination of gear ratio and tire size for your vehicle.

4. Tire Size Calculator

Convert the funky P-Metric tire size (Example: 265/75R16) on the side of your tires to inches to simplify these drivetrain calculators!

Get the App! Click on your system icon below!