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 BOM may be used with the Dana Expert to identify all aspects of this particular axle. Make sure to select the appropriate Light Duty or Heavy Duty section of The Expert.

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 ZF Front Ram Differential Gear Axle Ring Pinion PartsChrysler 9.25″ ZF Front

9.25″ ZF Parts Catalog

Dana 20 Differential Parts Gear AxleDana 28 IFS Front

Dana 28 Parts Catalog

Dana 28 IRS Rear Gear Axle Ring Pinion Pards Ford EscapeDana 28 IRS Rear

Dana 28 Parts Catalog

Dana 30 M186 Jeep Wrangler JL JT Gladiator Gear Axle Ring Pinion PartsDana 30 M186 Jeep JL Front

D30 JL Front Parts Catalog

Dana 35 Advantek M200 Jeep JL JT Wrangler Gladiator Rear Gear Axle Ring Pinion PartsDana 35 AdvanTEK® Jeep JL Rear

D35 JL Rear Parts Catalog

Dana 44 Advantek M210 JL JT Wrangler Gladiator Front Rubicon Gear Axle Ring Pinion PartsDana 44 AdvanTEK® Jeep JL/JT Front

D44 JL/JT Front Parts Catalog

Dana 44 Advantek M220 Rear Rubicon JL JT Wrangler Gladiator Gear Axle Ring Pinion PartsDana 44 AdvanTEK® Jeep JL/JT Rear

D44 JL/JT Rear Parts Catalog

GM 55 Passenger Differential Parts Gear AxleGM ’55 Passenger

GM 55P Parts Catalog

GM 55 Truck Differential Parts Gear AxleGM ’55 Truck

GM 55T Parts Catalog

GM 8.875 12 bolt passenger differential parts gear axleGM 8.875″ 12-Bolt Passenger

GM 12-Bolt Parts Catalog

GM 8.875 12 Bolt Truck Differential Parts Gear Axle Ring PinionGM 8.875″ 12-Bolt Truck Axle

GM 12-Bolt Parts Catalog

GM 9.25 IFS Ring Pinion Gear Axle Differential PartsGM 9.25 IFS Front Clamshell

GM 9.25″ Parts Catalog

GM 14 Bolt Differential Parts Gear Axle Ring PinionGM 9.5″ 14-Bolt Rear Axle

GM 9.5″ Parts Catalog

Corvette Dana 36 Ring Pinion Gear Axle Differential PartsCorvette D36 ’84-’96

Corvette D36 Parts Catalog

Corvette Dana 44 Ring Pinion Gear Axle Differential PartsCorvette D44 ’80-’82

Corvette D44 Parts Catalog

Corvette Dana 44 HD Ring Pinion Gear Axle Differential PartsCorvette D44HD ’84-’96

Corvette D44HD Catalog

Corvette GETRAG Ring Pinion Gear Axle Differential PartsGETRAG ’97-’05

Corvette GETRAG Catalog

Sprinter Gear Axle Ring Pinion PartsMercedes Sprinter

07+ MB248 Parts Catalog

Nissan M226 Titan Gear Axle Ring Pinion Differential PartsNissan M226 ’04-’07

Nissan M226 Parts Catalog

Toyota 7.6 Gear Axle Ring Pinion Front Differential PartsToyota 7.5″ IFS Std. Rotation

Toyota 7.5″ Parts Catalog

Toyota 7.5 Gear Axle Ring Pinion Clamshell reverse Front Differential PartsToyota 7.5″ IFS Rev. Clamshell

Toyota 7.5″ Parts Catalog

Toyota 8 ring pinion gear axle differential partsToyota 8″ 4-Cylinder Front/Rear

Toyota 8″ Parts Catalog

Toyota 8 V6 ring Pinion Gear Axle Differential PartsToyota 8″ V6 / Turbo Rear

Toyota 8″ Parts Catalog

Toyota Tacoma 8" E-Locker Differential Parts Gear Axle Ring PinionToyota 8″ w / E-Locker Rear

Toyota 8″ Parts Catalog

Toyota 8 Reverse Clamshell 4Runner FJ Tacoma GX Parts Ring Pinion Gear Axle Differential PartsToyota 8″ IFS Rev. Clamshell

8″ Reverse Parts Catalog

Toyota 8.2 differential parts gear axle ring pinionToyota 8.2″ Rear Third Member

Toyota 8.2″ Parts Catalog

Toyota 8.4 Tacoma T100 Tundra gear axle ring pinion kit differential partsToyota 8.4″ Rear Third Member

Toyota 8.4″ Parts Catalog

Tacoma 8.75 Rear Ring Pinion Gear Axle Differential PartsToyota 8.75″ Rear Third Member

Toyota 8.75″ Rear Parts Catalog

Toyota Tundra Land Cruiser 8.75 IFS Front ring pinion gear axle differential partsToyota 8.75″ Reverse IFS Front

Toyota 8.75″ IFS Parts Catalog

Toyota 10.5" Differential Parts Gear Axle Ring Pinion Tundra 5.7Toyota 10.5″ Rear Third Member

Toyota 10.5″ Parts Catalog

Landcruiser 8" Differential Parts Gear Axle Ring PinionToyota Land Cruiser 8″ Rev. Front

Land Cruiser 8″ Front Parts

Toyota Land Cruiser Landcruiser 9.5 Gear Axle Ring Pinion Differential PartsToyota Land Cruiser 9.5″ Front / Rear

Land Cruiser 9.5″ Parts

Land Cruiser Landcruiser 200 series ring pinion gear axle differential partsToyota Land Cruiser 9.5″ Late Rear

Land Cruiser 9.5″ Parts

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