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DIFFERENTIAL IDENTIFICATION
Identify your Axle Assembly using Tags, Codes and Visual Clues

The first and most important step in any differential repair or ratio change is accurate differential identification!

Careful identification of the differential you are working on will make sure you get the right parts for the job the first time. Need help with your differential identification? Call Sierra Gear & Axle at (800)792-2714. Our differential experts are available from 8am to 5pm PST Monday thru Friday.

Dana Spicer and Ford Differentials can be identified most accurately by the tag number or axle tube stamp.

Go to: Differential Tags

Information about Differentials in GM vehicles can usually be obtained by looking at the RPO or “Regular Production Option” codes contained in the Service Parts Identification tag in the glovebox.

Go to: GM RPO Codes

Whenever possible, reference the tag numbers when ordering parts for your Differential. If the ID tag or stamp is missing or unreadable, differentials can be 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. The chart below shows various differential covers, 3rd Members and housings.

Found your application and need parts? Locate a Sierra Gear & Axle Distributor near you, or call (800) 792-2714

AAM 9.25″ Chrysler Front

AAM 10.5″ Chrysler

AAM 11.5″ GM / Chrysler

AMC Model 20

AMC Model 35

Chrysler 7.25″

Chrysler 8″ IFS

Chrysler 8.25″

Chrysler 8.75″ Third Member

Chrysler 9.25″

Dana 28™

Dana 30™

Dana 44™

Dana 50™

Dana 60™

Dana 70™

Dana 80™

Dana S110™

Ford 9.75"

Ford 8" 3rd Member

Ford 8.8"

Ford 9" Third Member

Ford 9.75"

Ford 10.25" & 10.5"

GM '55 Passenger

GM '55 Truck

GM 7.25" IFS Clamshell

GM 7.5" / 7.625"

GM 8.5"

GM 8.5" Front

GM 8.6"

GM 12 Bolt Passenger (8.875")

GM 12 Bolt Truck (8.875″)

GM 9.25″ IFS Clamshell

GM 9.5″

GM 10.5″ 14 Bolt

Toyota 7.5″ Early 3rd Member

Toyota 7.5″ IFS Front

Toyota 7.5″ IFS Clamshell

Toyota 8″ 4-Cyl. 3rd Member

Toyota 8″ V6 / Turbo 3rd Member

Toyota 8″ Tacoma / T100 3rd Member

Toyota 8″ E-Locker 3rd Member

Toyota 8″ Landcruiser High Pinion 3rd Member

Toyota Landcruiser 8.75″ Reverse IFS Front

Toyota 9.5″ Landcruiser 3rd Member

Toyota 10.5″ 3rd Member

Find a Dealer

Find the application and ratio you need? Locate a Sierra Gear & Axle Distributor near you.

Gear Calculator

Doing a gear ratio change but not sure what you want? Try our Differential Gear Calculator.