Accurate Differential Identification is the first and most important step in your differential repair, upgrade or overhaul project. The following information is provided to help you identify the differential you are working on. If in doubt, consult one of our differential experts at (800)510-0950! Professional technical support is available Monday thru Friday from 8am to 5pm Pacific Standard Time.

On this page:  Differential Identification by Tag Number  |  Visual Differential Identification


Differential Identification by Tag Number

The most accurate differential identification is provided by the bottom line of the tag number or axle tube stamp. Differential tags can easily be used to identify Dana and Ford differentials.


Dana Spicer Differential Tags

Dana Spicer Differential Identification Tags


Dana Spicer B.O.M. Numbers

Dana Spicer Axle Identification Numbers BOM Bill Of Materials

The Bill of Material (BOM) number is used to identify Dana differentials. 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. For instance, you might see 5561-1 for the BOM, but the 60 has been dropped, and one would need to use 605561-1. Later BOM’s may start with the first 3 digits of 200, but these are typically not dropped from the tag.

The “Dana Expert” website is no longer available. However, the Dana Aftermarket Media Library can be used to identify all aspects of a particular axle using the Bill Of Materials number.

  1. Navigate to the Dana Aftermarket Media Library
  2. Enter the BOM number in the Keyword Search field (top left corner of the page).
  3. Click on the resulting literature link
  4. Search within the document by clicking on the Magnifying Glass at the top, or by simply using “Control-F” and re-entering the BOM number.

Need help identifying your differential or not sure which replacement or performance parts you need? Call our staff of differential experts at (800)510-0950. We’re here to help Monday thru Friday from 8AM to 5PM PST


Ford Differential Tags

Ford Axle and Differential Identification Tag ID

Ford differential tags are very straightforward, as indicated above. The Month of Manufacture uses the following format:
A = January, B = February, C = March, etc.


GM RPO Identification Codes

GM RPO Codes Axle identification

GM Vehicles come with a RPO code tag, usually located in the vehicles glovebox or door jamb. These tags have a wealth of information about your specific vehicle’s equipment and specifications. Read more about GM RPO Axle Identification Codes

Need help identifying your differential or not sure which replacement or performance parts you need? Call our staff of differential experts at (800)510-0950. We’re here to help Monday thru Friday from 8AM to 5PM PST


Identifying Components

Not sure what the part you need is called? Use our Exploded View Diagrams to identify the part by name. This way we’ll be on the same page when you call!



 


Technical & Sales Assistance

Need help identifying your differential or not sure which replacement or performance parts you need? Call our staff of differential experts at (800)510-0950. We’re here to help Monday thru Friday from 8AM to 5PM PST



Visual Differential Identification

Without an ID tag, differentials are identified by the number of cover bolts, the distinctive shape of the cover, the number of ring gear bolts, and ring gear diameter. They can also be identified by whether the center section is an integral or dropout design. Dropout differentials are also referred to as 3rd members or pumpkins.

Use the images below to Help Identify Your Differential.

Chrysler 9.25 Inch ZF RAM Front - Differential, Gear & Axle PartsChrysler 9.25″ ZF Front

9.25″ ZF Parts Catalog

Dana 20 - Differential, Gear & Axle PartsDana 28 IFS Front

Dana 28 Parts Catalog

Dana 28 IRS Escape Rear - Differential, Gear & Axle PartsDana 28 IRS Rear

Dana 28 Parts Catalog

Dana 30 M186 Jeep JL Wrangler / JT Gladiator Front - Differential, Gear & Axle PartsDana 30 M186 Jeep JL Front

D30 JL Front Parts Catalog

Dana 35 Advantek M200 Jeep JL Wrangler Rear - Differential, Gear & Axle PartsDana 35 AdvanTEK® Jeep JL Rear

D35 JL Rear Parts Catalog

Dana 44 Advantek M210 JL Wrangler / JT Gladiator Rubicon Front - Differential, Gear & Axle PartsDana 44 AdvanTEK® Jeep JL/JT Front

D44 JL/JT Front Parts Catalog

Dana 44 Advantek M220 JL Wrangler / JT Gladiator Rubicon Rear - Differential, Gear & Axle PartsDana 44 AdvanTEK® Jeep JL/JT Rear

D44 JL/JT Rear Parts Catalog

GM 55 Passenger - Differential, Gear & Axle PartsGM ’55 Passenger

GM 55P Parts Catalog

GM 55 Truck - Differential, Gear & Axle PartsGM ’55 Truck

GM 55T Parts Catalog

GM 8.875 Inch 12 Bolt Passenger - Differential, Gear & Axle PartsGM 8.875″ 12-Bolt Passenger

GM 12-Bolt Parts Catalog

GM 8.875 Inch 12 Bolt Truck - Differential, Gear & Axle PartsGM 8.875″ 12-Bolt Truck Axle

GM 12-Bolt Parts Catalog

GM 9.25 Inch IFS - Differential, Gear & Axle PartsGM 9.25 IFS Front Clamshell

GM 9.25″ Parts Catalog

GM 9.5 Inch 14 Bolt - Differential, Gear & Axle PartsGM 9.5″ 14-Bolt Rear Axle

GM 9.5″ Parts Catalog

Corvette Dana 36 - Differential, Gear & Axle PartsCorvette D36 ’84-’96

Corvette D36 Parts Catalog

Corvette Dana 44 - Differential, Gear & Axle PartsCorvette D44 ’80-’82

Corvette D44 Parts Catalog

Corvette Dana 44 HD - Differential, Gear & Axle PartsCorvette D44HD ’84-’96

Corvette D44HD Catalog

Corvette GETRAG Rear Axle - Differential, Gear & Axle PartsGETRAG ’97-’05

Corvette GETRAG Catalog

Mercedes Sprinter Vanlife - Differential, Gear & Axle PartsMercedes Sprinter

07+ MB248 Parts Catalog

Nissan M226 Titan Rear - Differential, Gear & Axle PartsNissan M226 ’04-’07

Nissan M226 Parts Catalog

Toyota 7.6 - Differential, Gear & Axle PartsToyota 7.5″ IFS Std. Rotation

Toyota 7.5″ Parts Catalog

Toyota 7.5 Gear Reverse Clamshell Front - Differential, Gear & Axle PartsToyota 7.5″ IFS Rev. Clamshell

Toyota 7.5″ Parts Catalog

Toyota 8 Inch - Differential, Gear & Axle PartsToyota 8″ 4-Cylinder Front/Rear

Toyota 8″ Parts Catalog

Toyota 8 Inch V6 - Differential, Gear & Axle PartsToyota 8″ V6 / Turbo Rear

Toyota 8″ Parts Catalog

Toyota Tacoma 8 Inch E-Locker - Differential, Gear & Axle PartsToyota 8″ w / E-Locker Rear

Toyota 8″ Parts Catalog

Toyota 8 Reverse Clamshell 4Runner, FJ, Tacoma & GX Front - Differential, Gear & Axle PartsToyota 8″ IFS Rev. Clamshell

8″ Reverse Parts Catalog

Toyota 8.2 Inch - Differential, Gear & Axle PartsToyota 8.2″ Rear Third Member

Toyota 8.2″ Parts Catalog

Toyota 8.4 Tacoma. T100 & Tundra Rear - Differential, Gear & Axle PartsToyota 8.4″ Rear Third Member

Toyota 8.4″ Parts Catalog

Tacoma 8.75 Tacoma Rear - Differential, Gear & Axle PartsToyota 8.75″ Rear Third Member

Toyota 8.75″ Rear Parts Catalog

Toyota Tundra & Land Cruiser 8.75 IFS Front - Differential, Gear & Axle PartsToyota 8.75″ Reverse IFS Front

Toyota 8.75″ IFS Parts Catalog

Toyota 10.5 Inch Tundra 5.7 Rear - Differential, Gear & Axle PartsToyota 10.5″ Rear Third Member

Toyota 10.5″ Parts Catalog

Landcruiser 8 Inch Reverse Front - Differential, Gear & Axle PartsToyota Land Cruiser 8″ Rev. Front

Land Cruiser 8″ Front Parts

Toyota Land Cruiser Landcruiser 9.5 Inch - Differential, Gear & Axle PartsToyota Land Cruiser 9.5″ Front / Rear

Land Cruiser 9.5″ Parts

 Toyota Land Cruiser 200 Series - Differential, Gear & Axle PartsToyota Land Cruiser 9.5″ Late Rear

Land Cruiser 9.5″ Parts

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