Differences Between 4.10 vs. 3.73 – Which One Is Best for You?

Gear ratios play a critical role in determining the performance of your vehicle and how it should behave under load. Gear ratio also determines how many times the engine has to revolve the crankshaft so that it can make one rotation on the rear wheels. However, differentiating between a 3.73 and a 4.10 rear end can be challenging if you don’t have such knowledge.

If you find it hard to choose between a 3.73 and 4.10 rear end, then you don’t have to worry anymore. We have packaged this article for your self-actualization. I thought you should know that a higher gear ratio leads to greater rotations before your rear wheels turn. Therefore, the power reaching your wheels will be greater.

For more of such knowledge, continue reading our article. Apart from the differences, we have also shed light on which rear end is better for towing, what are 4-10 gears good for?, and whether 4.0 is good for towing or not. Well, let’s not waste time on the introduction.

Quick table

Differences between a 3.73 and a 4.10 rear ratio

Differentiating 3.73 from 4.10 ratios can be challenging, but have a look at the following;

• Performance

A 3.73 ratio remains appropriate for regular or standard light towing while 4.10 can still be used to tow heavier loads. This is a clear indication that if you intend to pull a 50-wheel trailer, consider opting for 4.10 gear ratio. A 3.73 gear ratio won’t tow something that exceeds 5000 pounds, your towing car will move with a lot of throttles.

• Revolutions per minute

While towing on the highway, a 3.73 isn’t preferable compared to a 4.10 which can stretch up to 200 revolutions per minute at around a speed of 75. With the automatic, you require every help that you want easy towing. With 3.73, for every 373 drive shaft rotations, it makes 100 axle rotations while 4.10 makes 410 drive shaft rpms to give you 100 axle rotations. This statement implies that the engine will spin faster on a 4.10 rear ratio compared to a 3.7.

• Heavy duty

As much as robustness is concerned, 3.73 remains ideal for day-to-day driving. On the other hand, a 4.10 consumes a lot of gas. However, this depends on whatever you are towing. For this reason, 4.10 are suitable for towing as well as transferring reduced end torque to your wheels.  I think this is one of the reasons; you are likely to find a 4.10 on four-wheel drive vehicles. A 3.73 on the other hand achieves reasonable gas mileage; if you remove the speed limiter, the top end speed might be quite higher.

• Accelerations

A 4.10 gear ratio is associated with quite impressive accelerations and increased engine RPM. You will achieve this at any speed. You will experience a dramatic difference if you opt for a 4.10 ratio. Even though the higher rotations will suck gas, the speed and accelerations will be excellent. 3.73 is associated with reduced acceleration, but tends to be less strenuous while cruising on the highway.

Are 3.73 or 4.10 better for towing?

The rotations made by these rear end ratios play a vital role in determining which one should be used on towing. 4.10 makes 410 drive shaft rpms, making it ideal for acceleration and towing in the case of AV or in drag-racing. Your engine will stretch to its maximum torque, forcing the horsepower to spin faster with less difficulty on the engine.

Your revolutions per minute will be greater at cruising speeds with 4.10 compared to 3.73. However, you are likely to pay a lot of money because the vehicle’s rpms will be greater at cruising.

It is advisable to dismantle the exhaust and make adjustments regardless of 4.10 or 3.73. You might have 3.73, but it sucks gas. We have seen some lads putting it clear that 4.10 is always better for both driving and towing compared to 3.73. Having at least 2200 revolutions is excellent in helping you achieve different driving responses. The rear end on a 2500 is impressive as it can help you to handle torque.

Advancing from 3.73 gears to 4.10 has some negative effects like more turnings on the rear wheels. This will eventually interfere with the consumption of gas. Whether it is automatic or manual transmissions, excellent operations are always preferable. There might be rough gear and irritating noises; just know that there is an internal problem. The earlier you take action, the better; you will cut the repair bills.

Problematic linkage systems that connect the shifter to your gearbox can affect manual transmissions to the gear. Luckily, it is possible to realign these linkages, but it depends on the type of your car. This could be also another indicator of a troubled clutch hydraulic system; simple troubleshooting can solve the issue.

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Diagnosing a complication in automatics can be a bit challenging. However, any change in accelerations can imply a sliding clutch.

What are 4.10 gears good for?

From the above discussion, you can realize that 4.10 gears are suitable for towing as well as regular driving. However, we have sampled a few scenarios where these gears are best for;

Excellent performance: Opting for 4.10 gears enhances the performance of the car on the truck. However, there will also be slight effects to your highway driving. In situations where your car has an overdrive, you are likely to realize no difference in gas mileage. Besides, you can easily modify the general gearing to bring everything into normalcy. Though this depends on the installed transmission.

 They are good for faster wheels: Nowadays, most Mustangs plus other sports vehicles are equipped with 3.55 gears. Therefore, adding 4.10 gears will improve the performance on the wheels. Their drag times will be faster, delivering sufficient power to the wheels. However, sometimes this modification can affect the speedometer calibration, making it inaccurate.  But, that problem has nothing to do with manual transmission.

With manual transmission, you are likely to experience grinding noises when shifting. This might be caused by a faulty synchronizer. Besides, this could be an indicator of low-fluid level.

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Is a 4.10 gear ratio good for towing?

Yes, this is a beast when it comes to pulling heavy loads whether in the highway or city driving. Besides, it doesn’t recognize steep or varied grades; it allows you to tow anything. The revolutions in the gear ratio are enormous. With a 4.10 gear ratio, you will enjoy enhanced acceleration in go-stop city life.

With such a gear ratio, gooseneck trailers won’t be a problem. Everything will run smoothly as per your wish. You therefore don’t have to worry when you want to drag heavy loads. Consider 4.10 gears. However, you have seen the negative sides of such a gear on the performance and gas mileage.

It is therefore worth noting that 4.10 gears are better for towing; the lower reduced gearing the better. If you want to tow a 4k lbs load, a 3.73 can just do fine. But if you intend to pull heavier loads, then 4.10’s should help you achieve the chemistry.

You might be interested to read also our another comprehensive article of: 3.42 vs. 3.73- Is There a Big Difference You Should Need to Know

Frequently asked questions:

• How should I have to install a 4.10 gear?

The cost of installing these gears varies, but approximately, the price should range from $240 to $300. This depends on the automotive shop you intend to take your car to; go to those fellows you have their trust. Anything exceeding this limit will empty your pocket. But, payment for the labour is a must during the installation; have your own Trac-Lok rebuild.

• Is there any gear ratio that is best for street roads?

If you have the habit of driving daily, it is advisable to use a gear ratio of 3.23 or below. Such a gear will leave you with maximum performance and reduce cruising RPMs. Therefore for strip and street applications, a common choice should range from 3.42s to 3.90s.

• Is a 4.10 gear good for 25s?

Yes, a 4.10 gear ratio will just do fine in 35s. It remains suitable, mostly if you are among the enthusiastic off roaders. One of my friends advanced from 3.21-4.10 with the 35-inch Terra Grapplers. There was an enormous difference on his 2dr manual transmission; roaming around round is perfect.

• What is a good rear axle ratio for towing?

Nowadays, the mostly used axle end ratio in trucks is the 3:55. This ratio is impressive as it not only saves on fuel, but also has excellent towing power. If you are a hauling individual or likes occasional towing, then this ratio is meant for you. On the other hand, for lads who tow oftenly or pull heavier loads, the 4.10 or 3.73 will just do fine.

Final words

After taking you through various knowledge categories, allow me to put a full stop on today’s discussion. At least you are now capable of determining whether a 3.73 or 4.10 gear ratio are suitable for towing or not. Besides, the article has equipped you with comprehensive knowledge concerning the scenarios where the 4.10 gear is suitable.