How do I know what Ford rear differential I have?

Identifying Ford Rear Differential
To determine what type of Ford rear differential you have, there are several methods you can use:
1. Check the axle code on the driver side door jam: Look for a tag on the driver side door jam of your vehicle. The tag will have an axle code that you can use to identify the rear end. You can then look up the axle code online to find out which differential you have.
2. Count the number of bolts on the rear end housing inspection cover: Different Ford models have a different number of bolts on the inspection cover. However, certain Dana units may have the same bolt count. Ford 8 and 9-inch rear ends are removable carrier units and have no inspection cover. The back of these units have a smooth hump with no bolts. You can compare the bolt count and inspection cover gasket shape to a differential identification listing to determine the type of differential you have.
3. Check for differential tags or stampings: The bottom line of the tag number or axle tube stamp can provide accurate differential identification. Dana Spicer differential tags and B.O.M. (Bill Of Materials) numbers can be used to identify Dana and Ford differentials. You can navigate to the Dana Aftermarket Media Library and enter the BOM number in the Keyword Search field to identify the axle.
4. Check for intact tag numbers or tube stamps: Ford differential tags are ordered as year, month, and day. The tag number will appear something like 12D04, which signifies April 4, 2012. Dana differentials can be identified using the Bill of Material (BOM) number. Traditional BOMs are six digits long and begin with the number 60 or 61, followed by 1 or 2 digits.
Please note that these methods may not be applicable if there have been previous gear set swaps or modifications to the rear end. In such cases, it may be necessary to consult a professional or use additional identification techniques, such as casting numbers and date stamps on the differential cover or axle tube.
I hope this helps you identify the Ford rear differential you have! Let me know if you have any further questions.

Can you tell gear ratio from VIN?

You don’t. That information is not contained in the VIN, UNLESS a specific model only gets one rear end ratio. VIN tells country of manufacture, vehicle make, class, engine type, size, date of manufacture, plant and serial number. That is the ONLY information contained by the VIN.

How can I tell what rear end is in my F150?

Mustangs, F150’s and other Fords can have their axle ratio easily identified by reading the sticker on the inside of the driver’s side door jamb.

How do you identify a Ford differential?

The location of Ford identification tags will vary by model, but most are located on a carrier cover bolt. The Ring Gear Size (differential type) and the Gear Ratio will be printed on the tag (as well as whether or not the differential is limited slip).

How to tell the difference between Ford 8.8 and 9.75 rear end?

On the passenger’s side upper and lower corners, there’s two semi-circular divots that can easily be seen when looking at the cover from straight on. While the Super 8.8’s cover has a bulge for the ring gear, it’s not anywhere near as pronounced as the 9.75’s.

Where is the gear ratio stamped?

Check Differential Cover
On the axle you might have a sticker, and on the differential cover you might have a little metal tag that’s sticking out. That will have the gear ratio stamped right on that.

How do you read a Ford rear differential tag?

Gives most of the Fords will have the same format. So your super duties your f-150 is your Mustangs. Pretty much follow the same setup. You’ll have the ratio you’ll have the differential. Diameter.

What Ford has 8.8 rear end?

Ford first used the 8.8 axle in 1983 model year trucks and is still in production for the Ford Ranger and Ford F-Series. It was also used in the Ford SUVs until Independent suspension replaced the solid axle.

How do I identify the 8.8 Ford rear end?

You can identify the Ford 8.8-inch rear by its rear cover. It has a thin metal or plastic 10-bolt cover, and the bolts are 7/16-inch thread. The cover is not quite square, measuring about 101/2 inches high by 11 inches long. The 8.8-inch pinion shaft is 15/8 inches and has 30 splines.

How do I know what kind of rear differential I have?

How to Identify Your Differential and Axle Type

1. Cover Bolt Count. Since most differentials have a unique cover bolt pattern i.e. 10-bolt, 12-bolt, or 14-bolt, counting them up will narrow the field and help you with identification.
2. Axle Flotation.
3. Get Your Spline In Line.
4. Spec Out Your Hub.
5. Pinion Size & Ring Gear Diameter.

What is the ID tag on a Ford 8.8 rear end?

A Ford identifying tag is attached to one of the rear cover bolts. The four-letter code on the top right of the tag will be a dead giveaway as to whether you have found an 8.8-inch axle. The first three digits of these codes are listed with the original applications mentioned on the chart.