Can I upgrade my axle ratio?
You can change the axle ratio, and you can do it rather easily. Quite a few members here have gone from one ratio to the next. People with 3.21 and 3.55s are going up to 3.92 and even sometimes 4.10. A lot of the 4×4 trucks you see here with lifts and larger tires have gone with 4.10 or 4.56.
What should the rear axle gear ratio be?
Using a 3.90 rear axle gear ratio as an example [2.87 x 3.90 = 11.19], this is on the high side for a high torque engine. A 3.36 rear axle gear ratio would be more livable [3.36 x 2.87 = 9.64]. Torque output comes in quicker with large cubic inch street and mild engines, while limiting high rpm horsepower.
How much does a 4.1 axle ratio cost?
As of 2019, a 4.1 axle ratio from the factory shouldn’t cost much more than $50. Overall, the final drive ratio of your truck has a minor impact on fuel economy compared to other factors, such as low tire pressure, overuse of air conditioning, an inefficient or neglected engine, and frequent rapid acceleration.
How can I change the gear ratio on my car?
Input your stock and new tires sizes along with your original gear ratio. Click “Calculate” to find your new effective gear ratio and the gear ratio needed to return your vehicle back to stock gearing. Changing tire size will ultimately affect the power and drivability of your vehicle.
What is the rear axle gear ratio for a Tremec?
Tremec also has a TKO 600 five speed overdrive transmission available with a 2.87 first gear ratio. This might be used in engines that produce high torque at low rpm (big blocks or large cubic inch small blocks). Using a 3.90 rear axle gear ratio as an example [2.87 x 3.90 = 11.19], this is on the high side for a high torque engine.
How is tire size and axle gear ratio related?
This page is a Differential Gear Ratio Chart for comparing tire size to axle gear ratio and the combined effect on power and fuel economy.
Input your stock and new tires sizes along with your original gear ratio. Click “Calculate” to find your new effective gear ratio and the gear ratio needed to return your vehicle back to stock gearing. Changing tire size will ultimately affect the power and drivability of your vehicle.
Which is better 3.9 or 3.2 axle ratio?
A numerically higher ratio — say, 3.9 as opposed to 3.2 — can pull heavy loads much better but has a worse fuel economy and lower speed. By contrast, a numerically lower ratio has better fuel economy but worse torque and towing power. Which axle ratio is best for you comes down to how you want to use your truck.
How do you calculate the axle ratio of a truck?
Another way to calculate the axle ratio is to divide the number of teeth on the ring gear by that of the pinion gear. The resulting number is the ratio. Picking the right axle ratio for your truck is essential because different axle ratios have different trade-offs in terms of fuel efficiency and other factors.