Jeep TJ Gear Ratio Calculator

The Jeep TJ, a popular off-road vehicle, came with various gear ratios. The most common rear axle gear ratios for the Jeep TJ are 3.07, 3.55, and 4.10, while front axle ratios typically match the rear. The choice of gear ratio depends on factors like tire size and intended use, with lower ratios offering more torque for off-roading and higher ratios for better highway performance.

Jeep TJ Gear Ratio Calculator

Jeep TJ Gear Ratio Calculator




Result:

Axle PositionCommon Gear Ratios
Rear Axle3.07, 3.55, 4.10
Front AxleMatching Rear Axle

FAQs


How do I know what gear ratio my Jeep TJ has?
You can usually find your Jeep TJ’s gear ratio on a metal tag attached to the differential cover or by checking the build sheet, which is often located in the glove compartment or under the rear seat. Additionally, you can jack up the rear of your Jeep, rotate the rear wheel one full turn while counting the number of driveshaft rotations; this will give you an approximate gear ratio.

What is the best gear ratio for a TJ with 33s? A common and suitable gear ratio for a Jeep TJ with 33-inch tires is 4.10:1. This provides a good balance between off-road capability and on-road performance.

Can you tell Jeep gear ratio by VIN? No, you cannot determine the gear ratio of a Jeep by its VIN alone. The VIN provides information about the vehicle’s make, model, year, and manufacturing plant but not specific details like the gear ratio.

What gear ratio is a 1997 TJ? The 1997 Jeep TJ commonly came with either a 3.07:1 or a 3.73:1 gear ratio, but it’s essential to confirm your specific vehicle’s gear ratio as it can vary.

What gear ratio is the Jeep TJ 4.0 stock? The stock gear ratio for a Jeep TJ with a 4.0L engine typically ranges from 3.07:1 to 3.73:1, depending on the specific model and year.

What is the gear ratio of the rear axle on a Jeep TJ? The rear axle gear ratio on a Jeep TJ can vary, but common ratios include 3.07:1, 3.55:1, 3.73:1, and 4.10:1, depending on the model and options.

Do smaller tires increase gear ratio? No, smaller tires do not increase the gear ratio. The gear ratio is determined by the size of the ring and pinion gears in the differential, and changing tire size does not affect this ratio.

What gear ratio makes you go faster? A higher gear ratio (e.g., 3.73:1 or 4.10:1) can make your vehicle accelerate faster, but it may reduce top speed. A lower gear ratio (e.g., 3.07:1) can increase top speed but may reduce acceleration.

What gear ratio is a Dana 35 for a Jeep TJ? A common gear ratio for a Dana 35 rear axle on a Jeep TJ is 3.07:1, but it can vary depending on the specific model and options.

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How can I tell what gear ratio I have without pulling cover? You can estimate your gear ratio by jacking up the rear of your Jeep, rotating the rear wheel one full turn, and counting the number of driveshaft rotations. This will give you a rough idea of the gear ratio.

How do I know if my Jeep has a 3.73 axle? You can confirm the axle ratio by checking the metal tag on the differential cover or referring to your Jeep’s build sheet. The tag or build sheet will specify the gear ratio.

What is the stock gear ratio in a Jeep Wrangler? The stock gear ratio in a Jeep Wrangler can vary depending on the model and year. Common stock ratios include 3.21:1, 3.73:1, and 4.10:1.

What gear ratio is in a Dana? Dana manufactures various types of axles, and the gear ratios can vary widely. You need to specify the specific Dana axle model to determine the gear ratio accurately.

What is the stock 14 bolt gear ratio? The stock gear ratio for a GM 14-bolt axle, which is not typically found in Jeeps, can vary depending on the specific vehicle it was installed in. Common ratios include 3.73:1 and 4.10:1.

What is the difference between 3.73 and 4.10 gear ratio? A 3.73 gear ratio provides a slightly higher top speed and better fuel efficiency compared to a 4.10 gear ratio. However, the 4.10 ratio offers better low-end torque and acceleration, making it more suitable for off-road and towing applications.

What axle does my TJ have? The Jeep TJ could come with various axles, including the Dana 35, Dana 44, and others. You can determine your axle type by checking the axle housing or referring to your Jeep’s build sheet.

How much horsepower does a 4.0 Jeep TJ have? The 4.0L inline-six engine in a Jeep TJ typically produced around 190-200 horsepower, although this can vary slightly depending on the model year and specific engine tuning.

What is 4L on Jeep TJ? The “4L” on a Jeep TJ refers to the 4.0L inline-six engine commonly used in this model. It is known for its reliability and off-road capability.

What size differential is a Jeep TJ? The size of the differential in a Jeep TJ can vary depending on the axle type. Common axle sizes include Dana 35, Dana 44, and others.

What is the best rear axle gear ratio? The best rear axle gear ratio depends on your specific vehicle, tire size, and usage. Generally, for a Jeep TJ with 33-inch tires, a 4.10:1 ratio is often considered a good balance between on-road and off-road performance.

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What rear axle ratio is best? The best rear axle ratio depends on your specific needs and vehicle setup. Lower ratios like 4.10:1 are better for off-roading and towing, while higher ratios like 3.21:1 are better for fuel efficiency and highway driving.

What happens if you don’t re-gear with bigger tires? If you install larger tires without re-gearing, your vehicle may experience reduced acceleration, decreased fuel efficiency, and strain on the engine and transmission, especially in off-road situations.

Do taller tires increase gear ratio? No, taller tires do not increase the gear ratio. The gear ratio remains the same unless you physically change the ring and pinion gears in the differential.

Does higher gear ratio give more torque? Yes, a higher gear ratio (numerically higher) provides more mechanical advantage and results in higher torque at the wheels, which can improve off-road performance and towing capabilities.

What is the best gear ratio for a Jeep with 35-inch tires? For Jeep vehicles with 35-inch tires, a common and suitable gear ratio is 4.56:1. However, the best ratio can vary depending on your specific vehicle and usage.

What gearing for 37-inch tires? For 37-inch tires on a Jeep, a common gear ratio is around 4.88:1. However, the ideal ratio may vary depending on your vehicle and intended use.

Which gear will turn the slowest? A higher gear ratio (numerically higher) will turn the slowest because it provides more mechanical advantage but sacrifices top speed.

Can you run 35 on a Dana 30? While you can run 35-inch tires on a Dana 30 axle, it’s not the most robust option for larger tires, especially for aggressive off-roading. Upgrading to a stronger axle, like a Dana 44, is often recommended for 35-inch tires.

How strong is a Dana 35? The Dana 35 axle is not considered exceptionally strong, especially for larger tires or heavy off-road use. It’s more suitable for light to moderate off-roading with smaller tires.

How wide is the Dana 35 axle on a Jeep TJ? The width of the Dana 35 axle on a Jeep TJ can vary depending on the specific model and year, but it’s typically around 58 inches from wheel mount surface to wheel mount surface.

How do I choose the right gear ratio? Choosing the right gear ratio depends on your vehicle, tire size, and intended use. It’s best to consult with a mechanic or off-road specialist who can consider your specific needs and recommend an appropriate ratio.

How can I tell what my gear ratio is? You can typically find your gear ratio by checking the metal tag on the differential cover, referring to your build sheet, or using the “spin the wheel” method to estimate it.

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How do I know what differential my Jeep has? You can determine your Jeep’s differential type by checking the axle housing or referring to your build sheet. The differential type is often indicated on a metal tag or stamp on the axle housing.

How do I know if my Jeep TJ has a limited-slip differential? Limited-slip differentials are often indicated on the build sheet or by a tag on the differential cover. You can also perform a visual inspection to see if your rear differential has a limited-slip mechanism.

What is the rear axle ratio on a Jeep TJ Dana 44? The rear axle ratio on a Jeep TJ with a Dana 44 axle can vary, but common ratios include 3.73:1 and 4.10:1.

Is a 3.73 axle good? A 3.73 axle ratio can be suitable for many applications, providing a good balance between acceleration and top speed. However, the ideal ratio depends on your specific vehicle and needs.

How much does it cost to re-gear a Jeep? The cost of re-gearing a Jeep can vary widely depending on factors like the shop’s labor rates, parts costs, and your location. It can range from $1,000 to $2,500 or more per axle.

What is the best gear ratio for a Jeep? The best gear ratio for a Jeep depends on your specific vehicle, tire size, and intended use. Common ratios like 4.10:1 and 4.56:1 often work well for a balance of on-road and off-road performance.

Do I need to re-gear my Jeep with 33s? Re-gearing is often recommended when upgrading to 33-inch tires, especially if you want to maintain optimal performance and fuel efficiency. A common choice is a 4.10:1 ratio for 33s, but it depends on your specific setup and goals.

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