What differential ratio do I need?

Higher ratios are better for freeway driving since they run at lower RPM’s and offer better fuel economy. If you originally had 3.07 gears you need a ratio that is approximately 17% lower, such as 3.55. If you want to increase off road performance you might want a 4.10 or lower ratio.

What is a good gearbox ratio?

If you’re towing a light vehicle, a 3.73 gear ratio can be a suitable number. However, for heavy towing, like 5,000 pounds or more, you’ll need a 4.10 gear ratio.

What is a good gear ratio for highway driving?

For on-highway linehaul, the range tightens to a fuel friendly 2.26 through 3.42 for the most common ratios. “For on-highway, direct drive, it starts all the way down at 2.26 and up to 3.08 or larger,” Garrison says. “Getting into the mid- and upper-threes is starting to get more unusual these days.”

Are 4.10 gears good for highway?

Installing 4.10 gears improves the car’s performance on the track but with negligible effects to the highway driving. Switching from a gear set of 3.55 or 3.73 to 4.10 gears will affect your gas mileage slightly as your engine will be turning more times to rotate the rear wheels once.

Does higher gear ratio mean faster?

A lower (taller) gear ratio provides a higher top speed, and a higher (shorter) gear ratio provides faster acceleration. . Besides the gears in the transmission, there is also a gear in the rear differential. This is known as the final drive, differential gear, Crown Wheel Pinion (CWP) or ring and pinion.

Are 4.10 gears good for 35s?

I’ve got 4.10s with 35s, with the 4.0 and ax15. I can get up to about 80 on the highway, and can hold 70 just fine. I’ll be going to deeper gears sometime though, but for a DD, 4.10s are alright.

Will 4.10 gears make my car faster?

Most late model Mustangs and many other sports cars come equipped with standard 3.55 gears in their rear differential, however by adding 4.10 gears they can effectively make their drag times faster and deliver more power to the wheels faster. This equates to a greater amount of power transferred to the wheels.

What gear ratio is best for torque?

A numerically higher axle ratio provides a mechanical advantage to send more of the engine’s available torque to the rear tires (and front tires, in a four-wheel drive vehicle), but you pay the price at the fuel pump. So, a truck with optional 3.73 gears will tow a heavier trailer than one with 3.55 or 3.21.

What gear ratio is better for torque?

In general, a lower final drive ratio will lead to less torque at the wheels but a higher top speed. Meanwhile, a higher ratio will result in the opposite, i.e. more torque at the wheels but a lower top speed. Remember, this is done without any change to the power and torque of the engine.

How is the input ratio of a gearbox determined?

The constant input ratio is determined by the input shaft and corresponding laygear gear. Suffice to say that the ratios are quoted as a comparison – i.e. first gear ratio in an A+ ‘box is 3.64 to 1.

How do you find out your diff gear ratio?

At 10 wheels spins the masking tape on both the tyre and the driveshaft should land in the same original postion as the starting point. Usually there is a sticker on the diff housing that says what the ratio is but if in doubt, this is the best way to know exactly what gears you have.

What should the differential ratio be in a mini?

Eg at 3500 revs in 4th gear a low 4.1 ratio will do 47 mph and at the same engine revs a high ratio 3.44 would be doing 56.2 mph ….So a 2.95 ratio diff is HIGH (high top speed, reduced acceleration, increased economy), a 3.9 ratio is LOW (low top speed, increased acceleration).

Which is better 4.1 or 2.95 diff ratio?

Further confusion comes from the fact that a low diff ratio of say 4.1 can produce a fast Mini, this is because the engine for that specific Mini will have to rev highly which will give both quick acceleration and high top speed, (but low for the revs involved). A 2.95 ratio will give slower acceleration because the ‘mph per engine rev’ is greater.

What do you need to know about differential gear ratio?

In order to select the ideal differential gear ratio, the first thing you will need to know is your actual tire diameter. The simplest method is to measure the height of the tire from the ground to the top of the tire.

How does gear ratio affect speed and torque?

When the rear end gear ratio is 1:1, the amount of speed and torque is similar. Therefore, when you increase the axle ratio, you reduce the amount of torque and significantly increase speed, and if you reduce the axle ratio, you reduce speed and boost the torque.