Jeep Axle Identification by VIN – Detailed Guide

The identification of the axle type is one of the most important aspects for Jeep owners, enthusiasts and mechanics. In terms of vehicle performance, especially when it comes to off-road vehicles, the axle plays an important role. For a number of reasons, including maintenance, upgrading and changes, identification of the type of axle is essential.

Jeep Axle Identification by VIN

We’ll go over this process of identifying Jeep axles using Vehicle Identification Number (VIN), which will give you the right knowledge to decrypt this vital information.

Jeep Axle Identification Chart 

   Jeep Axle 
Year In-Out Jeep ModelsRing Gear          Details 
Chrysler 8.25
10 Bolt Holes 
11 ⅜  Wide 


Dana 35
10 Bolt Holes
10 ⅝ Wide 


TJ, YJ , XJ 


AMC 20
12 Bolt Holes
10 ¾ Wide


     CJ , SJ 


29/1.25″/semi floating
Dana 44
10 Bolt Holes
10 ⅜ Wide 


CJ , FC , SJ(G), SJ, TJ, ZJ 


Dana 30 
10 Bolt Holes 
9” Wide 




Dana 25,27 
10 Bolt Holes
9” Wide 




10/1.13″/full floating

Locating the Axle Identification 

The VIN is not directly marked with the axle identification number or code. However, important information that can help to determine the axle type on an indirect basis is provided in the VIN. There are certain characters in the Vehicle Identification Number corresponding to vehicle specification that need to be identified accurately when determining an axle type.

Decoding the VIN 

Follow the following steps to decode a VIN and obtain information about an axle:

Step 1: Find out in sections the VIN for each section

There are 17 characters on the VIN, and each character represents an individual piece of information. A breakdown of what each section stands for is given below:

1- Country of Origin 

2- Manufacturer 

3- Vehicle Type 

4- Restraint System

5-  Lines, series, body type

6- Engine Type 

7- Check Digit Model Year 

8- Assembly Plant 

9- Production Sequence Number

Step 2: Select the relevant characters

Focus on the 10th and 11th characters, which represent the model year of the vehicle as well as the assembly plant for determining the axle type. In order to narrow down the possibilities in determining the axle, these characters are essential.

Step 3: Look at the manufacturer’s specifications

There are multiple axle options available in a variety of Jeep models and years. Contact the manufacturer’s specification for your particular model and year of Jeep in order to make an accurate identification of the type of axle. In this respect, it may be useful to use Jeep’s official website, owner’s manual or a reliable online forum and resource for Jeep vehicles.

Step 4: Refer to the information as follows

You may cross reference this information with manufacturer’s specifications when establishing model year and assembly plant. Search for axle codes or descriptions related to the relevant model year and production facility. Detailed information on the axle type, gear ratio and any additional appropriate specifications shall be provided in these codes or descriptions.

Why is the Axle an important part of the Jeep? 

We’ll take a look at the significance of the axle in Jeep and see how it functions, as well as looking at its different shapes and impacts on the performance of this legendary vehicle.

1. Understanding the Axle

The axle is an integral part of the transmission of power from the engine to the wheels. In order to allow for distribution of torque and facilitate the wheel’s movement, it acts as a connection point between the drive shaft and the wheels. A vehicle like the Jeep would not be able to transfer energy in an efficient manner, leaving it immobilized with no axles.

2. Types of Axles

Jeep vehicles are equipped with a variety of axle types, each designed to meet individual driving conditions and requirements. The front and hind axles are the two most common types of axle.

a. Front Axle: Steering and distribution of power to the front wheels shall be carried out under the responsibility of the front axle. In terms of Jeep’s maneuverability and traction, especially in rough terrain conditions, they play an important role. The front axle is also an important structural component of a vehicle because it helps to support the engine weight.

b. Rear Axle: Transmission of power from transmission to rear wheels is most important for the rear axle. It’s designed to carry the weight of the vehicle and to assist in maintaining stability and balance during acceleration, braking and cornering. In combination with the differential, the rear axle shall be capable of rotating at a variety of speeds when cornering to ensure clean handling and prevent wheel slippage.

3. Off-Road Performance

Offroading Jeep

The direct impact on off road performance of the axles is one of the main reasons why they have such an important role in Jeeps. Jeeps have been known for their ability to conquer rough, rocky terrain such as cliff edges, caves and mud. It is important to ensure that the axles are able to cope with significant loads, shocks and torsion forces which may occur in an outdoor environment.

4. Upgradability and Customization:

Jeep fans often look for ways to improve the vehicle’s performance by adjusting different components, such as axles. The improvements will enhance the Jeep’s capabilities and deliver a personalized driving experience to its owners.

5. Towing and Payload Capacity 

 The axles play a crucial role in determining Jeeps’ towing and loading capacities, not to mention off road performance. The capacity of an axle to carry loads directly influences the weight that a vehicle is capable of towing or carrying. Improved axles that increase the weight rating can allow more trailers or baggage to be accommodated, as well as expand Jeep’s range of use in Recreational activities, Commercial uses and Heavy Duty applications.

FAQs- Jeep Axle Identification by VIN 

Do all Jeep Models have the axle information encoded in the VIN?

Yes, the axle information is embedded in the vehicle identification number for all Jeep models.

Are there any variations or exceptions in axle identification depending on the Jeep model or year?

Yes, axles may vary or be excluded from axle identification on a Jeep model or year. There may be differences in the type of axles or axle ratios between different models and years.

If the axle has been replaced or modified, will the axle identification in the VIN still be accurate?

No, the axle identification code on the VIN may not be as accurate in cases of replacing or altering an axle. The VIN contains the original data of the axle, which will prevent any modification or amendment from being reflected in the VIN.

Final Thoughts 

It is important to identify the type of Jeep axle for a variety of reasons, including servicing, repairs and modifications. Although the VIN does not necessarily provide axle identification, it provides valuable information that can help you decide which way to go.

It is possible to specify the axle type of a Jeep by decoding your vehicle identification number and crossing it with manufacturer’s specifications. To assure that your research is accurate, please consult trusted sources like the Official Jeep Website, owner’s manuals and dedicated Jeep community pages for more information. You will have more confidence in maintaining, enhancing or repairing your Jeep’s axle on the basis of this knowledge.

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