Full Answer
What is the gear ratio for a stock XJ Cherokee?
The stock 3.55:1 gear ratio you find in most automatic XJ Cherokee’s is perfect for the stock tire size or even a little bit larger. We’ve seen XJs on 37-inch tires run the stock gear ratios, but it was struggling to turn to those big tires.
How many gears does a Jeep Wrangler Wrangler have?
The Jeep in the photo below is running 5.13 gears on 40” tires, but with the addition of an Eaton M62 supercharger. If your Jeep is just a stock 4.0-liter you’ll want anything from a 5.29:1 to 6.17:1 gear ratio for the AW4 automatic.
What size tires should I put on my XJ Cherokee?
Share this article. After you’ve lifted your XJ Cherokee you’ll probably want to put some larger tires on it. If you’re upgrading to 31-inch tires you’ll probably be fine with the stock gear ratios in your axles. If you’re upgrading to 33 or 35-inch tires, however, you’re going to want to change the factory gear ratios.
How do I determine my gear ratio?
Below is a handy chart that can be used as a guideline when decided your gear ratio. You can also use the equation of stock tire height times stock gear ratio all divided by your desired tire size.
How do you find the gear ratio on a Jeep Grand Cherokee?
So an easy way to determine your actual gear ratio is to check the tag attached to the differential cover by the cover bolts. On the tag there should be some numbering such as 3.54 or 3.73, either of those numbers will give you the stock axle ratio.
How do I know what gear ratio I have in my Jeep?
2:246:113 Ways to Find Gear Ratios: Jeep Wrangler YJ Gear Ratios - YouTubeYouTubeStart of suggested clipEnd of suggested clipCompletely around two full revolutions until that mark gets back down to the bottom okay okay andMoreCompletely around two full revolutions until that mark gets back down to the bottom okay okay and while you do that I'm going to be counting how many times the drive shaft turns.
What is a 3.73 gear ratio good for?
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.
Is 3.55 or 3.73 gears better?
PERFORMANCE: The larger the axle ratio number, the quicker the truck will accelerate. For example, a truck equipped with 3.55:1 axle gearing will accelerate faster than one equipped with a 3.31 axle ratio. Similarly, a pickup with a 3.73 axle ratio will be faster than one with 3.55s.
How can I tell what gear ratio I have without pulling cover?
0:293:34How To Determining Rear Gear Ratio Without Removing Cover - YouTubeYouTubeStart of suggested clipEnd of suggested clipIf. It's a open wheel basically all in before you're positive and equip same thing this one rightMoreIf. It's a open wheel basically all in before you're positive and equip same thing this one right here is a pause e. You can see both wheels is spinning. The same direction if it's going opposite to
Where is the gear ratio stamped?
1:083:04How Can I Tell My Gear Ratio? #AskDuke 001 - YouTubeYouTubeStart of suggested clipEnd of suggested clipCover you might have a little metal tag that's sticking out that will have the gear ratio stampedMoreCover you might have a little metal tag that's sticking out that will have the gear ratio stamped right on that now if you're still not getting anywhere jack up the rear end of your vehicle.
Should I get 3.73 or 4.10 gears?
4.10s are going to accelerate faster and decelerate faster on lift. However the trade off is greater fuel consumption per mile driven and higher engine speed per given road speed. In basic terms the 4.10s will feel quicker and 3.73 will feel faster. Do you plan on towing or moderate to aggressive off-roading?
Are 3.73 gears good for 35 tires?
You will be fine. Just gonna lose mpg and slow your truck down. I have run 35s with 3.73s and no issues at all. In fact, my recent Plat had a 4-inch lift, heavy 34.5 inch Nitto Trails, and 3.55 gears, and ran great!
What gear ratio is best for off roading?
Under 50 Crawl Ratio - Most factory setups fall here. 50-60s Crawl Ratio – Backroads and light trail use. 80s Crawl Ratio – Intermediate trail use. 110-130s Crawl Ratio – Ideal for crawling, it allows taking obstacles at a slow, controlled speed without riding the brakes or applying constant throttle to avoid stalling.
What is an axle ratio on a Jeep?
When looking for a professional to help re-gear your Jeep, make sure they replace both the front and rear axles of your Jeep with premium quality gears. Typical new gear ratios are 4.10:1, 4.56:1, 4.88:1, or 5.13:1.
Are 3.31 gears good for towing?
The 3.31 might be capable of towing the trailer. But if you are towing the majority of the time, you probably want the 3.55 because it will tow better and provide better fuel economy loaded.
Which rear end gear ratio is best for fuel economy?
If you are going to add taller tires, get the lowest axle ratio (3.73 or 4.10) offered. If you tow or carry a big load in the bed, do the same as above. If you just want the best mpg and never tow or haul a load, get the tallest (3.23-3.42) ratio offered.
What size tires should I put on my XJ Cherokee?
After you’ve lifted your XJ Cherokee you’ll probably want to put some larger tires on it. If you’re upgrading to 31-inch tires you’ll probably be fine with the stock gear ratios in your axles. If you’re upgrading to 33 or 35-inch tires, however, you’re going to want to change the factory gear ratios. In this short guide, we’ll cover ...
How does a higher gear ratio affect torque?
If you make your gear ratio lower, it multiplies engine torque.
What is the gear ratio for a 37 inch tire?
If you’re running an AW4 automatic, a good gearing ratio for 37-inch tires is 4.88:1 or 5.13:1 gears.
What gear ratio for AW4?
A good gear ratio for the AW4 automatic running 35-inch tires is 4.56:1 or 4.88:1 gear.
What size tires should I use for a 33 inch Jeep?
Part of the reason we recommend 4.56:1 gears for the 33-inch tires is because they also work well with 35-inch tires. If your Jeep has the AX-15 automatic you’ll want around a 4.10:1 gear ratio. Here sits an XJ with 35-inch tires. At this tire size, you’ll also want to look into upgrading your rear axle to a Ford 8.8 or Dana 44.
What happens if your drive ratio isn't near the stock ratio?
If your effective drive ratio isn’t near the stock ratio it can cause transmission issues amongst many other problems. If you’re building a crawler you’ll obviously want an even lower gear ratio for more torque. Below is a handy chart that can be used as a guideline when decided your gear ratio.
Can you drive a 40 inch tire on a 40 inch Jeep?
At the 40-inch tire size, your XJ will basically be un-driveable on the street. Depending on what axles your Jeep has, your gear selection may be limited. The Jeep in the photo below is running 5.13 gears on 40” tires, but with the addition of an Eaton M62 supercharger.
