Question: How Can I Tell What Gear Ratio I Have Without Pulling Cover?

What gear ratio is best for pulling?

3:55The 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..

How do I know what Differential I have?

Without an ID tag, differentials are identified by the number of cover bolts, the distinctive shape of the cover, the number of ring gear bolts, and ring gear diameter. They can also be identified by whether the center section is an integral or dropout design.

What are the benefits of a limited slip differential?

Limited-Slip Differential Benefits Limited-slip differentials allow drivers to put down as much power as possible without breaking traction. This means the car can corner faster, without the unnerving feeling of tires losing grip. It also means less wear on tires due to loss of traction.

Do taller tires increase gear ratio?

When changing gears for taller tires, you are heading to a numerically higher gear ratio. The higher the gear ratio, the smaller the pinion gear.

How do I know what rear gear ratio I have?

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.

Are 3.73 or 4.10 gears better?

Vice versa, if the gear ratio is lower it has worse acceleration but a higher top speed. So, by changing your gear ratio, no power levels are being changed, just the torque….WHICH GEAR RATIO IS FOR YOU?3.73 RATIO4.10 RATIOBetter gas mileageWorse gas mileageHigher top speedLower top speed2 more rows•May 12, 2020

Are 3.73 gears good for highway?

Rear end gears (2.79’s, 3.00’s, 3.25’s, etc) are great for freeway driving, bit not good for 0-60 MPH or accelerating from a dead stop. Shorter gears (higher numbers) are much better suited for accelerating, such as 3.55, 3.73, 3.91’s, 4.11’s etc. Always remember, for very “give” there is a “take”.

How do I know if I have a limited slip differential?

The easiest way to tell if you have an open differential is to jack up the car and spin one of the rear tires. If the other wheel spins in the opposite direction, you have an open differential. If it spins in the same direction, you have a limited slip differential, or LSD.

Is 3.55 or 3.73 gears better?

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.

Does bigger tires change gear ratio?

Taller than stock tires alter the final drive ratio of your 4×4 at the tires and effectively decrease the power you can put to the ground. The bigger the tires are, the more noticeable the change. The added weight and wind resistance also tax the engine.

How do I know what gear ratio I have?

Count the number of teeth on the pinion gear and count the number of teeth on the ring gear. Divide the ring gear teeth number by the number of teeth on the pinion. The result is your gear ratio. Note: you may need to round off the number.

What gear ratio should I use for 33 inch tires?

So if our truck had 30-inch tires stock, and a 3.73:1 axle ratio, that calculation would tell us we need a 4.103:1 (which rounds off to the readily available 4.10:1) gear ratio to get us back to stock with 33-inch tires.

How do you decode a VIN number?

How to decode a VIN?Digits 1 through 3 combined is the WMI, (World Manufacturer Identifier).Digits 4 through 8 represent the vehicle descriptor section.Digit 9 is a check digit.Digits 10 through 17 is the Vehicle Identifier Section.The 11th digit is the manufacturer’s plant code.More items…•

How do I know what rear end I have?

Casting codes can also be used to identify the manufacture date.Count the number of inspection cover bolts on the rear end housing. … Identify the most common GM rear-end types. … Look at the shape of the inspection cover and the gasket. … Locate the GM manufactured rear-end casting date on the housing.

What are 4.88 gears good for?

Pros and Cons. The pros are that these gears have a stronger V6 third member (in the rear) with lower gears that are suitable for larger tires, and (most importantly) they can be had for less than a full ring and pinion install. If you have an IFS truck, you can swap in the 4.88 IFS front diff.

How much does it cost to change gear ratio?

As to cost, depending on where it is done, it could cost you as little as 750 dollars to as much as 1500 dollars per axle. Best prices would probably be a performance shop that does it all the time.

Does VIN number tell gear ratio?

The vehicle identification number (VIN) is a 17-digit code that is used to identify and track every automobile produced. … The codes on that tag will tell you the gear ratio. The VIN will not give you gear ratios in most cases.

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

The gearing ratio is an indicator of the financial risk associated with a company. If a company has too much debt, it can fall into financial distress. A high gearing ratio shows a high proportion of debt to equity, while a low gearing ratio shows the opposite.

How do I identify my GM differential?

Information about Differentials in GM vehicles can usually be obtained by looking at the RPO or “Regular Production Option” codes contained in the Service Parts Identification tag in the glovebox. Whenever possible, reference the tag numbers when ordering parts for your Differential.

What is a good gear ratio for 35 inch tires?

A 4×4 Differential Gear Ratio Chart TableTire342126366835206535633620083464371954337022 more rows