# Question: Are 3.73 Or 4.10 Gears Better?

## What gear ratio is best for fuel economy?

The lower the number, the better fuel economy, and the higher the number the more towing power you have, but fuel economy suffers.

For instance, a 3:31 gets better fuel economy than a 3:73.

On the other hand, a 3:73 or perhaps a 4:10 will tow much more, while fuel economy greatly drops..

## What is the difference between a 3.73 and 4.10 axle?

The ratio is the number of teeth on the driven gear (ring) divided by the number of teeth on the drive gear (pinion). … So for gear ratio of 3.73, for every one turn of the ring gear, the pinion will turn 3.73 times and for gear ratio of 4.10, for every one turn of the ring gear, the pinion will turn 4.10 times.

## How fast can you go with 4.10 gears?

With 4.10s…. With stock size tires you can go 150 mph at 5393 rpm in 5th gear. Check out the rpm calculator in the tech section.

## Does gear ratio affect horsepower?

This method will measure horsepower (and torque) at the drive wheels and not at the flywheel. Power output using this method will normally be 15 to 20 percent lower since drive train losses are taken into account. … Axle or transmission gears with a ratio of 4.55 to 1 have a lower gear ratio than one that says 3.27 to 1.

## How many teeth does 4.10 gears have?

Example41 teeth on ring gear41 teeth on ring gear40 teeth on ring gear10 teeth on pinion12 teeth on pinion13 teeth on pinion41/10 = 4.1041/12 = 3.4240/13 = 3.08

## Is 3.42 or 3.73 better?

The 3.42 is fine for towing smaller boats, plus you will get better gas mileage for everyday driving. If I were towing frequently on hilly roads, I might would go for the 3.73 for better gas mileage while towing, but the 3.42 should be fine with a 205.

## WHAT WILL 3.73 gears do?

So, a truck with optional 3.73 gears will tow a heavier trailer than one with 3.55 or 3.21. But it will also use more fuel in all situations because the engine’s rpm will be higher. … Four-wheel-drive trucks will have a ratio in the front axle’s differential that closely matches that of the rear axle.

## Do 4.10 gears make a difference?

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.

## What are 4.10 gears good for?

A 4.10 axle ratio will provide improved acceleration in stop and go city traffic. A lower gear (higher numerical) ratio provides more low-speed wheel torque, which makes it easier to get the vehicle moving when pulling a trailer or carrying a heavy load.

## Does 3.73 gears make a difference?

Yes, while it’s a noticeable improvement in seat of the pants acceleration, you will run out of rpms quicker with 3.73s. In the long run you’ll find yourself looking for more engine rpms. The increased torque multiplication of lower gears will help make better use of a higher revving engine combo.

## Are 3.73 gears good for highway?

Well, if you plan on doing a lot of freeway driving, you don’t want to choose a gear that’s too low for your car because you’ll be going down the freeway at too high of an RPM. … Shorter gears (higher numbers) are much better suited for accelerating, such as 3.55, 3.73, 3.91’s, 4.11’s etc.

## How much does it cost to get 4.10 gears installed?

Installation costs will vary, but a good rule of thumb is between \$250 and \$300. Be sure to work with a reliable shop that you trust for installations. You can also save money on your installation labor by having your Trac-Lok rebuilt at the same time as your gears are installed, see drop down option above.