How Do I Know What Gear Ratio I Need?

What gear ratio do I have by Vin?

How to Find Out the Gear Ratio With the VIN NumberFind the VIN of your vehicle.

Identify the VDS section, the fourth through eighth digits of the VIN.

Find a guide online, such as Edmunds.com or Decode This, or contact an automobile dealer to help interpret the VDS..

Is 3.42 or 3.73 better?

The 3.42 is fine for towing smaller boats, plus you will get better gas mileage for everyday driving. If I were towing frequently on hilly roads, I might would go for the 3.73 for better gas mileage while towing, but the 3.42 should be fine with a 205.

What gear ratio do I need for 35 inch tires?

Depending on the axle, the next lowest ratio from a 4.10:1 is most likely the 4.56:1, which should be selected for towing and performance. Because of the extra weight associated with off-road tires, we usually recommend going with a performance-minded gear ratio for any tire size above 35 inches.

How do I know what gear ratio my front differential is?

Pull off the diff cover and count the ring gear teeth and the pinion gear teeth, then divide the pinion gear into the ring gear. That will give you the exact ratio.

What does the 8th digit of a VIN mean?

The 8th Eighth Digit in the VIN Vehicle Identification Number Indicates Engine. Share.

How do I identify my Chevy rear end?

How to Identify a Chevy Rear EndCount the number of inspection cover bolts on the rear end housing. The inspection cover is on the back of the housing, seen by looking forward under the license plate at the rear of the vehicle. … Identify the most common GM rear-end types. … Look at the shape of the inspection cover and the gasket.

What is the best gear ratio for drag racing?

With a 3.08:1 rear gear, the effective First gear ratio is equal to a 2.20:1 First gear Muncie four-speed with 4.56:1 rear gear. In the quarter-mile, Fourth gear is equivalent to running a 3.79:1 rear gear. But shift into 1:1 Fifth gear and enjoy the highway cruising rpm of a 3.08:1 rear gear.

How do I know what gear ratio My rear end is?

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. For better accuracy, turn the wheel 20 times and divide by 2 for your rear axle 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

What gear ratio is a Dana 44?

Dana 44: These are the beefier axles found on the rear of all Wrangler models now with either a 3.21 or 3.73 gear ratio. The Dana 44 ring gear size is 8 ½ inches. Rubicon models come standard with a 4.10 rear gear ratio and also use a Dana 44 axle in the front with either a 3.73 or 4.10 gear ratio.

How do I determine my gear ratio?

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.

What is the best gear ratio?

If you prefer top speed to dragstrip performance, then higher axle gears, like 2.76:1 or 3.08:1, may be called for. The higher gears will reduce engine rpm versus road speed. Another way to look at it is that the car will go faster at the engine’s rpm limit than it would with lower gears.

Are 3.73 gears good for highway?

Well, if you plan on doing a lot of freeway driving, you don’t want to choose a gear that’s too low for your car because you’ll be going down the freeway at too high of an RPM. … Shorter gears (higher numbers) are much better suited for accelerating, such as 3.55, 3.73, 3.91’s, 4.11’s etc.

How do I tell what gear ratio my Chevy rear end has?

Identify your GMC or Chevrolet rear end gear ratio by the RPO Codes, usually located on the placard labeled “Service Parts Identification” inside the drivers door panel or glove box.