Question: How Do I Know What Rear Gear Ratio I Have?

What does the 8th digit in a VIN number mean?

Digits in position 4 through 9 make up the Vehicle Description Section (VDS).

The fourth through eighth digits describe your vehicle’s model, body type, restraint system, transmission type, and engine code..

What do the first 3 digits of a VIN mean?

The first three digits of the VIN make up the World Manufacturer Identifier (WMI) number. However, if an automaker builds fewer than 500 vehicles per year, 9 will be the third digit and positions 12-14 (part of the production number) will make up the second part of the manufacturer’s WMI.

What letter of the VIN is engine size?

You can find the VIN in the lower corner of your windshield on the driver’s side. In the series of numbers and letters, the tenth from the left denotes the model year and the eighth is the engine code. Just tell the store clerk those two characters and you’re in business.

How do I know what axle I have?

The BOM will identify the model number, the gear ratio, the type of differential, and all component parts. Traditional BOM’s are 6 digits followed by 1 or 2 digits and start with the numbers 60 or 61. On some tags, the first 2 digits don’t appear on the tag, but they must be used to identify the axle.

How do I know my Chevy gear ratio?

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.

How do I know what size rear end I have?

Measure the diameter of the ring gear. This measurement equals the size of your rear end. Count how many bolts are on the inspection cover. If you have 10 bolts, then your Ford has a 7.5-inch or an 8.8-inch rear end.

How do I find the axle ratio on my vin?

Contact the dealer or the manufacturer (you could get a customer service number from the owners manual of the truck) and give them the VIN number and tell them you wish to know the axle ratio. They may only need certain digits from the VIN to determine, but it’s better to have them all in case.

What is the difference between 3.73 and 4.10 gear ratio?

Use this rule of thumb: The higher the gear ratio, the easier it is to get the vehicle moving and better accelerating, but lowers top speed. Vice versa, if the gear ratio is lower it has worse acceleration but a higher top speed….WHICH GEAR RATIO IS FOR YOU?3.73 RATIO4.10 RATIOHigher top speedLower top speed3 more rows•May 12, 2020

How do you know what gear ratio you have?

The gear ratio is calculated by dividing the output speed by the input speed (i= Ws/ We) or by dividing the number of teeth of the driving gear by the number of teeth of the driven gear (i= Ze/ Zs).

How do you read a VIN code?

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 find my axle code?

How to Figure Out the Gear Ratio on an F-150Locate the “Vehicle Certification Plate” on the inside of the driver’s door near the door latch. The axle code is printed under “Axle” or “Ax.” You can use the chart provided in the first resource below to cross reference the axle code. … Locate the axle tag on the rear axle.

How do I find the axle ratio on my GMC Sierra?

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.

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.