How to Use the TREMEC Gear Ratio Calculator
When building a vehicle, selecting a TREMEC 5- or 6-speed transmission gives you the opportunity to change the vehicle’s axle gear ratio in order to maximize the driving experience. The TREMEC Gear Ratio Calculator makes it easy to experiment with the affect that various ratios will have on the engine rpm at various speeds, letting you choose the ratio that will be best for the way you want to use your vehicle.
On the street, having a great match with the transmission gearing and the rear axle gear results in good drivability in stop and go traffic as well as a desirable highway cruise rpm. You can also avoid “lugging down” the engine while cruising at normal street and highway speeds by checking that the engine rpm will be within desired ranges.
At the track, having the right axle gear for your transmission gears can often make the difference between winning and losing. While important with all types of racing, the ability to see specific engine rpm at various vehicle speeds is critical for setting up a car correctly for auto cross and road racing.
The TREMEC gear ratio calculator provides an easy way to calculate and see how your chosen TREMEC transmission will act with any rear axle gear, or any other transmission for that matter. It’s ideal for comparing your vehicle with the existing transmission and what will happen when you change to an off-the-self or customized TREMEC transmission. Besides the already preloaded manual transmission profiles to choose from, you enter the gear ratio data for 3-, 4-, 5-, or 6-speed transmissions manually and see the speed you would be at in each gear to the rpm inputted into the calculator. Besides cruising speeds, for racing you can calculate the vehicle speed you’d be at for the optimal shift points of your engine.
Here are some examples of how the calculator works in relation to those different scenarios.