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Eaton Detroit Truetrac Differentials 913A481

Detroit Locker 913A481 - Eaton Detroit Truetrac Differentials
  • Summit Racing: Eaton Detroit Truetrac Differential

    Summit Racing: Eaton Detroit Truetrac Differential

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    Detroit Locker TrueTrac Differential

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Differential, Eaton Detroit Truetrac, Limited Slip, 30-Spline, GM, 8.5/8.6 in., Each

Estimated Ship Date: ...Loading Tuesday 5/26/2020
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  • Up to $75 Summit Bucks on Eaton Detroit Truetrac Differentials!

  • Order this item and get free delivery and handling on your entire order! Offer excludes truck freight and oversize fees. Valid on orders shipped in the contiguous United States.

Brand: Detroit Locker

Manufacturer's Part Number: 913A481

Part Type: Differential Carriers

Product Line: Eaton Detroit Truetrac Differentials

Summit Racing Part Number: DTL-913A481

Differential Case Design Type: GM 8.5/8.6 in.

Aftermarket Carrier Style: Helical gear

Cover Bolts: 10

Axle Shaft Spline Quantity: 30

Manufacturer of Axle: GM

Carrier Material: Steel

Carrier Bearings Included: No

Quantity: Sold individually.

Notes: Eaton differentials require special bearings. For 1999 and prior- bearing LM102949 and race LM102911 are required. (2.89 O.D. race) For applications 1999 and newer with race O.D. of 3.06 in. bearing LM603049 and race LM603012 are required.

Special Attention: Eaton recommends a petroleum/mineral based GL-5 80W90 gear oil for all Truetrac differentials. Do not use synthetic gear oil or friction modifiers.

In-Store Pickup: Choose In-store pick-up (OH, NV, GA, TX) on our web site.

Eaton Detroit Truetrac differentials use a patented design of parallel-axis planetary helix gears to provide a quiet, automatic splitting of torque. They perform like a limited-slip differential under normal driving conditions, automatically transferring torque to the wheel with better traction when ground conditions warrant. These replacement units are available for dozens of axle applications.


Questions & Answers Ask a Product Question

I have a 1996 gmc 1500 with a 4:56 gear in the rear. Will this product still work? I obviously have drum brakes in the back.

Asked by MATTHEW on July 18, 2016


As long as your current diff is a 10 bolt. & your axles are 30 spline. I replaced my 28 spline axles w/ Moser's 30 spline.

SCOTT from SC answered on July 20, 2016

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Would this fit my 1996 2 door tahoe?

Asked by DANIEL on November 18, 2017


Yes, If you were to click on the "Find out if this fits your application" window on the right it lets you know the applications that it fits. 8.5" and 8.6" are nominal and the earlier ones were 28 spline while later (like yours) is 30 spline as long as it is the original rear axle assy.

JAMES from WI answered on November 20, 2017

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I want to put this in my 2002 sierra 1500 can i use the stock bearings i just put new bearings in like 6 months ago.

Asked by JEREMY on July 02, 2017


The carrier bearings are bigger factory size is 2.8 the ones required are 3.062 because this carrier is bigger and thicker

JUSTIN from LA answered on July 04, 2017

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I have a 1993 Chevy c1500. I do not know what type of diferental I have bit will this work on my vehicle?

Asked by CARLOS on December 01, 2017


93 chevy should be a 10 bolt 30 spline axles 8.5 style as factory. Count your bolts on your cover should be 10. If it is a 10 bolt it work.

JOSEPH S from OK answered on December 20, 2017

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Some parts are not legal for use in California or other states with similar laws / regulations

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