How do I know what size rear axle I have?
Knowing the size of your vehicle's rear axle is important for various reasons, such as selecting the right replacement parts or upgrading your suspension. Fortunately, there are a few simple ways to determine the rear axle size of your car or truck.
Inspect the Rear Axle
The easiest way to find your rear axle size is to physically inspect the rear axle itself. Look for a tag or stamp on the axle housing that indicates the size, usually in the format of "8.8" or "9.75". This number represents the diameter of the axle in inches.
Check the Vehicle Identification Number (VIN)
Another way to determine the rear axle size is to look up the information using your vehicle's VIN. The VIN contains coded information about your vehicle, including the rear axle specifications. You can typically find your VIN on the driver's side dashboard, the driver's side door jamb, or in your vehicle's owner's manual.
Consult Your Owner's Manual
Your vehicle's owner's manual is another reliable source for rear axle size information. The manual will often list the specific rear axle size for your make, model, and year of vehicle.
Measure the Rear Axle
If you can't find the rear axle size through the methods above, you can measure it yourself. Measure the diameter of the axle housing, not the diameter of the wheel or tire. This will give you the rear axle size.
Knowing the size of your rear axle is an important piece of information that can help you make informed decisions about your vehicle's maintenance and upgrades. By following these simple steps, you can easily determine the rear axle size of your car or truck.
How do I know if I have a 7.5 or 8.5 rear end?
The 8.5s and 7.5s look remarkably similar, so you'll need a measuring tape to confirm. You can also check the RPO code list in the glovebox or trunk lid for the original rear, but you still need to verify the actual housing itself since it is easy to swap them out.
What rear axle ratio do I have?
Method 1: Count the number of teeth on the ring gear and the pinion. Divide the number of the ring gear's teeth by the number of the pinion's teeth. This will give you the axle ratio.
How to identify a thru axle?
However, thru axles are different than a skewer because rather than using a camming mechanism to hold the wheel on, a thru axle threads directly into your bike frame. Your bike has a thru axle if the “drop out” is a hole, rather than a U-shaped dropout.
How to find out thru axle size?
The Distance In-Between Your Frame or Fork
This is also know as O.L.D. or Over Locknut Dimension. For a front thru-axle, this is measured from the inside to inside of your fork. For a rear thru-axle, this is measured from the inside to inside of your frame at the drop-outs.
How to measure axle size?
Measure from the outside face of one brake flange to the outside face of the opposite brake flange. Most axles have a standard amount of space between the brake flanges and hubs, depending on the axle size.
How to find axle code?
1. View the Safety Compliance Certification Label on the driver's side, front or rear door panel. 2. Find the word AXLE under the bar code.
How do you tell what size rear axle you have?
Check the Differential Cover
The axle may have a sticker, and on the differential cover, you might have a small metal tag that's sticking out that will have the gear ratio stamped on it.
How do you measure axle size?
You want to keep your tape parallel to the shaft. If you measure at an angle you're going to add length to your dimension. Don't do that depending on the length of your shaft. And the flange.
Where do I find my axle size?
You should find it on the driver's side of the trailer. A second way to determine the size axle you need is to measure the diameter of your existing axle. The tube in our video example measures at 2 and 3/8ths of an inch. You can use this measurement to identify the axle.
How do I find my axle number?
Can't find your axle label? Your nine-digit axle serial number is etched into the axle tube near the center on the rear side. PROTIP: If the axle is older, try rubbing a piece of chalk over the number to help bring out the engraving better.
