Is A 3.92 Rear Axle Ratio Good?

But opt for the higher 3.92 axle ratio and that same truck packs a higher towing capacity of 9,930 pounds. The extra towing capacity comes about because the increased engine spinning helps improve off-the-line acceleration and pulling power when carrying heavy loads.

Are 3.92 gears good for towing?

4) 3.92 has 3 unique lower gears for towing. 5) Speed range that 3.21 is better at towing: 31-38 MPH, 48-57 MPH. 6) Speed range that 3.92 is better at towing: 0-30 MPH, 39-47MPH, 58-70 MPH.

What’s better 3.92 or 3.21 gear ratio?

There’s a reason the 3.92 is an at-cost option. It’s the most preferable ratio. Having said that, if MPG is your primary objective, the 3.21 is the way go to with the diesel. On a gas engine, the RPM range is so great that gear ratio doesn’t make a lot of difference in efficiency.

Is 3.92 or 3.55 gear ratio better?

Go with the 3.55s. The main difference you will feel when towing with the 3.92 is a bit better acceleration at the bottom of the low speed range. Once moving the 3.55 will likely stay in each gear a bit longer effectively giving you something similar to the 3.92.

What rear axle ratio is best?

The most popular rear-end ratio in trucks today is the 3:55, which sort of averages towing power and fuel economy. This is a good ratio for the occasional towing or hauling individual. For a person who tows more often, and heavier loads, the 3:73 or 4:10 may be more appropriate.

What are 3.21 gears good for?

The 3.21 hits 60 right after shifting into 3rd. – towing: for trailers at or under 8k, the 3.21 is fine. Yes it will operate one one gear lower pretty much the whole time, and be a little slower from a stop, but easily plenty of power.

Is a 3.21 axle ratio good for towing?

The standard 3.21 axle ratio then gets you a maximum tow rating of 8,440 pounds.

How do I know if my Ram 1500 has 3.92 rear axle ratio?

Rotate the rear tire 2 times and count the number of times the drive shaft turns. Close to 4 times = 3.92. Close to 3 1/2 = 3.55 Close to 3 = 3.21.

Which RAM gear ratio is best?

So, to return to the same example, a Ram 1500 with the standard 3.21 axle ratio will get better fuel economy than a truck fitted with the 3.92. If towing isn’t your primary concern, the standard axle ratio is probably your best choice to balance towing capability and fuel economy.

How does axle ratio affect mpg?

Standard Axle Ratios
The standard ratio also is biased more toward fuel economy.The choice of a numerically higher axle ratio will only knock off about 1 mile per gallon from the truck’s fuel economy. But since pickup truck fuel efficiency is low to begin with, even a 1 mpg reduction is significant.

What is the difference in rear end gear ratios?

It’s a ratio that represents the number of revolutions the driveshaft must make to spin the axle one full turn. The higher the ratio, the higher the performance. The lower the ratio, the higher the fuel economy.

What is the best gear ratio for gas mileage?

Best MPG ratio
If getting the best fuel economy is priority, then choose the lowest numerical number offered, such as 3.08, 3.23 or 3.31. This applies to highway driving; city driving mpg isn’t really affected by the axle ratio. If you do a mix of both, go with the “standard” axle ratio offered by the manufacturer.

What is standard axle ratio?

The axle ratio for most trucks is between 3 and 4, meaning it takes three to four turns of the driveshaft to turn the axle once. That is why the ratio is often expressed as a number over one, such as 4.10:1.

How do I choose the right gear ratio?

The conventional procedure for selecting gear ratios is to pick ratios that run the engine rpm to redline at the end of the medium and longest straights, and pick the lower gear ratios to minimize the rev drop at each shift. This method minimizes the number of shifts per lap.

What gear ratio is best for speed?

4.10:1 gears
In the real world, typical street machines with aspirations for good dragstrip performance generally run quickest with 4.10:1 gears. Lower gears are required if the car is very heavy, or if the engine makes its power at the upper end of the rpm scale.

Is a 3.23 axle ratio good for towing?

AXLE RATIO
The lower the ratio, the better the fuel economy and speed but lower the towing power. The 2021 Silverado 1500 provides two axle ratios: 3.42 and 3.23. If you’re looking for a higher towing capacity, choose the 3.42 rear axle ratio. If it’s optimal fuel economy you’re after, choose the 3.23.

How do I figure out my rear end gear ratio?

Turn the wheel TWO revolutions and count the number of driveshaft turns. The number of driveshaft rotations will help you determine your rear axle ratio. For example, if it turned 3 and a half times, it’s a 3.50:1 ratio. If it turned 4 and a quarter times, it’s a 4.25:1 ratio.

What gear ratio is in my Dodge Ram?

Ram has a standard axle ratio of 3.21 on 2X4 trucks and 3.55 on 4X4 trucks and trucks with the diesel engine.

Does changing gear ratio affect towing capacity?

Why does increasing axle ratio boost maximum towing capacity? Higher RPMs directly impact the number of axel rotations it takes to turn a wheel 360 degrees. As a result, increased engine spinning improves pulling power while towing a heavy load. As such, the highest axle ratio trucks have the highest towing capacity.

Can you change your axle ratio?

Luckily, some tuners, such as Sharkwerks, can alter the transmission’s gear ratios to improve acceleration and shifting frequency. There’s also the axle ratio to consider. As with the transmission, changing the axle ratio changes vehicle performance. A higher ratio means better acceleration, but worse efficiency.

Does changing gear ratio increase towing capacity?

Changing your gear ratio can change towing capacity by changing the vehicle capability of torque and speed to pull a load effectively.