How to Check Gear Ratio Without Pulling Cover

To check your gear ratio without pulling the cover, you’ll need to measure the circumference of one of the tires and divide it by the circumference of the other.

  • Start your engine and let it idle in neutral for a few minutes
  • Jack up the back of your car and place jack stands under the rear axle
  • Make sure to set the parking brake before you start working on the vehicle
  • Measure the distance between two adjacent teeth on each gear wheel (driver side and passenger side)
  • This is done by placing a ruler or measuring tape against one tooth, then counting how many teeth away from that tooth until you reach an adjacent one (for example, if there are four teeth apart, this would be 4/1 ratio)
  • Divide both numbers together to get your gear ratio – for example, if there were four teeth apart on both gears, then this would be 4:1 ratio (4 divided by 1 = 4)
  • If there were five teeth apart on one gear wheel and six apart on another wheel, then it’s 5:6 ratio (5 divided by 6 = 0
  • Once you have determined what type of gearing system your car has – either standard open differential or limited-slip differential – you can compare these ratios with manufacturer specifications to ensure that everything is in tip top shape!
How to Check Gear Ratio Without Pulling Cover


What is the Easiest Way to Determine Gear Ratio?

The easiest way to determine gear ratio is by using a simple formula. To calculate it, you’ll need to know the number of teeth on each gear as well as their diameters. For example, if you have two gears with 20 and 40 teeth respectively and a diameter of 2 inches for both, then your gear ratio will be 0.5:1 (20/40).

By dividing the number of teeth in one gear by the other, you can quickly come up with an accurate measurement and easily determine your desired gear ratio. Additionally, there are various online calculators available that can help simplify this task even further.

How Do You Determine Gear Ratio by Turning a Tire?

Determining the gear ratio of your vehicle by turning a tire is a simple process that can be done with minimal tools. First, you will need to gather some information from your vehicle’s manual or manufacturer’s website which includes the gear ratios for each gear as well as the size of tires installed on your car.

With this data in hand, you can begin determining the gear ratio by counting how many times it takes for one complete revolution of a wheel when driving at a constant speed (usually around 20 mph).

For example, if you drive at 20 mph and it takes four full turns of the wheel before reaching that speed again, then your gear ratio is 4:1. Alternatively, you can use an online calculator to determine your vehicle’s exact gear ratio quickly and accurately. This method involves measuring both the diameter and circumference of either one or two wheels depending on whether front-wheel or rear-wheel drive is used respectively.

Once these measurements are taken they are plugged into an equation which gives you an accurate result for what your vehicles’ overall gearing is like. Determining a cars’ exact gearing can help owners make better decisions about future modifications such as engine swaps or transmission upgrades since knowing exactly what range their current setup offers them allows them to choose components accordingly.

How Do You Check Diff Gear Ratio?

To check the differential gear ratio, you first need to know what type of differential is in your vehicle. The most common type is an open differential which consists of two drive wheels that are connected by a pinion and crown wheel combination. This setup allows for different speeds between each wheel as it turns, allowing for cornering ability.

To measure the ratio of this setup requires measuring both the diameter of the pinion and crown wheel, then comparing them to one another using a mathematical formula. You can also use a special tool called a “gear-ratio gauge” which will accurately measure the ratios without having to calculate them yourself.

Once you have measured or calculated your gear ratio, you can compare it against manufacturer’s specifications or aftermarket parts listings to see if it matches up correctly with other vehicles in its class.

Knowing these numbers can help ensure proper performance when making modifications such as changing tire size or adding additional power components like forced induction systems or nitrous oxide kits.

How Do You Find the Gear Ratio on a Chevy Rear End?

To figure out the gear ratio on a Chevy rear end, you’ll need to first remove the cover plate. This can be done by loosening and removing the four bolts that affix it to the axle housing. Once this is removed, you’ll be able to access both ends of each axle shaft and count how many teeth are in each ring or pinion gear.

You will then divide the number of teeth on the ring gear by those on the pinion gear—this is your current gear ratio! If necessary, you can also measure diameter of each with a ruler or caliper to get an even more precise calculation.

Additionally, if there was ever any confusion about which side featured which gears in their respective sets, there should be chiseled numbers indicating what kind of setup it is (such as 4:11), making it easier for anyone who knows anything about car mechanics to identify them quickly without having to do any guesswork or counting.

Determining Rear Gear Ratio Without Removing Cover

How to Check Gear Ratio on Open Differential

Checking the gear ratio on an open differential may seem like a daunting task, but it’s actually quite simple. All you need is a jack, some chalk or paint, and a length of measuring tape to accurately measure your differential’s gear ratio. Start by raising the vehicle off the ground with the jack and then marking both tires with chalk or paint so that you can ensure they are turning at equal speeds.

Next, rotate one tire one full turn while counting how many times the opposite tire rotates in order to determine the Gear Ratio. Finally, measure the circumference of each tire and use this measurement to calculate your differential’s Gear Ratio from these numbers – if done correctly you should have an accurate reading!

How to Check Gear Ratio by Spinning the Tire

One way to check your car’s gear ratio is by spinning the tire. To do this, you’ll need to lift the vehicle so that all four of its tires are off the ground. Once it’s raised, spin one tire and count how many times the driveshaft needs to turn before the other wheel turns once.

This will give you an idea of what type of gearing your car has installed.

How to Find Gear Ratio by Vin

To find the gear ratio of a car by its VIN number, you will need to research your vehicle. Start by identifying the make and model of your car, then use an online resource such as CARFAX to look up the specifications for that particular vehicle. Once you have located the gear ratio information, you can use it to determine how quickly your car shifts gears and how much torque is applied when shifting between gears.

How to Find Front Differential Gear Ratio

If you’re looking for the front differential gear ratio in your vehicle, there are a few ways to get it. You can consult your owner’s manual, or look up the specifications online. Additionally, if you take your car to a professional mechanic they should be able to determine it with ease.

Knowing this important piece of information is essential for understanding how much torque is being applied and how fast each wheel is actually spinning compared to one another.


This blog post has provided an easy and efficient way to check your vehicle’s gear ratio without having to pull the cover. By using a few basic tools, such as a tape measure, some chalk or paint, and a calculator, you can accurately determine the gear ratio of your vehicle in less than thirty minutes.

With this knowledge at hand, you’ll be able to make informed decisions about how best to use your car for acceleration and uphill performance.

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