Quick Answer: What Is The Difference Between 3.21 And 3.92 Axle Ratio?

What is a 3.21 rear axle ratio?

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..

Is it better to have a higher or lower gear ratio?

Now for the confusing part of the story. A high numerical gear ratio is called a low gear or low rear end, and vice versa. Low gears give fast acceleration, high gears give better cruising. A smaller engine will need a lower rear end to give adequate acceleration.

Are 3.92 gears good for towing?

There is very minimal difference in towing and torque between the 3.21 and 3.92 with an 8 speed tranny. There was a good difference noted from a 3.55 to 3.92 with a 6 speed tranny it seemed the 3.55 would hunt for the lower gear more when towing over the 3.92 which would hunt way less.

Does gear ratio affect horsepower?

Motor HP does not change when you change gear ratios. … A dynamometer measures torque and RPM, and from those two values calculates horsepower. When you change gear ratios both RPM and torque will change but horsepower will not.

What gear ratio is best for speed?

If you prefer top speed to dragstrip performance, then higher axle gears, like 2.76:1 or 3.08:1, may be called for. The higher gears will reduce engine rpm versus road speed. Another way to look at it is that the car will go faster at the engine’s rpm limit than it would with lower gears.

Can I tow with a 3.23 gear ratio?

While the 3.23 axle ratio provides both strength and reliability, the 3.42 ratio is what you need for rugged capability and maximum towing capacity. The 3.42 axle ratio is either standard or available through the Max Trailering Package.

What’s the best gear ratio for 35 inch tires?

Depending on the axle, the next lowest ratio from a 4.10:1 is most likely the 4.56:1, which should be selected for towing and performance. Because of the extra weight associated with off-road tires, we usually recommend going with a performance-minded gear ratio for any tire size above 35 inches.

Do lower gears have more torque?

Lower gears have a bigger radius thus applying more torque (torque equals the cross product of force and displacement vectors). Also, output power=torque*angular speed. Hence assuming the same speed a lower gear will produce more power, as simple as that.

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.

Is it better to have more torque or horsepower?

Horsepower is how rapidly the vehicle can perform that work. … Of course, horsepower is tied to torque mathematically. Horsepower equals torque multiplied by rpm, divided by a constant. Because there is generally a limit on how fast you can spin an engine, having higher torque allows for greater horsepower at lower rpms.

Will 4.10 gears make my car faster?

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.

Is 3.73 a good gear ratio?

Two common base axle ratios for trucks are 3.08 and 3.42. A 3.73 ratio is suitable for regular light towing. If you plan on towing a fifth-wheel trailer or anything heavier than 5,000 pounds, you should consider a 4.1 axle ratio. A 4.1 ratio allows a towing vehicle to start moving without as much throttle.

Are 3.73 or 4.10 gears better?

A 3.73 is a higher gear ratio for half ton pickups its not the best gear for pulling trailers, now the 4.10 gears come stock from the factory on newer trucks and is one of the best rear end gears to use if you plan on pulling a trailer. These both vary by fuel mileage consumption so choose wisely.

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.

Is a 3.31 axle ratio good for towing?

“The 3.31 might be capable of towing the trailer. But if you are towing the majority of the time, you probably want the 3.55 because it will tow better and provide better fuel economy loaded.” Start with the total combined weight of the vehicle. … Note that pickup tow and haul ratings are listed by axle ratio.

What gear ratio is best for fuel economy?

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. The most popular rear end ratio in trucks today is the 3:55, which sort of averages towing power and fuel economy.

Is a 4.10 gear ratio good?

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.

What is a good gear ratio for a street car?

If it’s a daily driver, chances are you’ll want to keep your gear ratio at 3.23 or below for optimal performance and lower cruising RPMs. For street and strip applications, a popular choice ranges between 3.42s and 3.90s, giving you that extra oomph on the track while maintaining a tolerable cruising RPM on the street.

What is the cheapest way to increase horsepower?

5 Cheap Ways to Increase Horsepower (Under £400) Posted by Amsoil, 12th January 2018More horsepower! … Upgrade your car’s air intake. … Upgrade the car’s exhaust. … Engine tuning & performance chips. … Install a boost controller. … Upgrade to synthetic engine oil.