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Detroit TrueTrac 913A481

Detroit Truetrac Differential GM 10-Bolt

Detroit TrueTrac 913A481


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Detroit TrueTrac 913A481 Detroit Truetrac Differential GM 10-Bolt $459.99
Detroit Truetrac Differential
  • GM 10-Bolt
  • 1988-96 GM Car
  • 1988-2013 GM Truck
  • 30-Spline Axles
  • 8.5''/8.6'' Diameter Ring Gear
  • Fits 2.73 & Up Gear Ratios

  • Detroit TrueTrac 913A481 Details

    GM 10-Bolt

    All GM 8.5"/8.6"Eaton differentials require special bearings. For 28 spline axles with small bearing bores (race O.D. of 2.89"), usually found on vehicles prior to 1999, bearing LM-102949 and race LM-102911 are required. For 30 spline axles with large bearing bores (race O.D. of 3.06"), usually found on vehicles from 1999 to present, bearing LM-603049 and race LM-603012 are required. Will fit 2005.5-07 SAAB 9-7x


    Manufacturer's Part Number:

    The Detroit Truetrac is a helical-gear style performance differential that maximizes wheel traction and enhances driving and handling characteristics.

    The Truetrac operates as a standard or open differential under normal driving conditions, allowing one wheel to spin faster or slower as necessary. When a wheel encounters a loss of traction or the terrain changes, the gear separation forces take effect and transfer torque to the high-traction wheel. The helical-shaped gears mesh with increasing force until wheel spin is slowed or completely stopped. When the vehicle exits the low traction situation, the differential resumes normal operation.

    Operation of the Truetrac is smooth, quiet and automatic. The unit will engage without any driver knowledge or action required. It also has no wearable parts and requires no maintenance, meaning less time in the garage and more on the road.

  • Helical-style pinion gears
  • Limited-slip operation
  • Smooth and automatic engagement - no driver action needed
  • Parts are maintenance free meaning more time on the road
  • Validated performance and durability

  • 913A481 is rated 5.0 out of 5 by 4.
    Rated 5 out of 5 by from Truetrac on 1996 GMC Sierra The Truetrac installed as expected. Works great where traction is needed with no hesitation. Runs smooth and quiet. Don't even know it is there.
    Date published: 2018-01-18
    Rated 5 out of 5 by from Strong traction Easy install, truck catches great now. No more one wheel wonders.
    Date published: 2017-06-15
    Rated 5 out of 5 by from Seems to work well, very quick reaction time I installed my tru track about 3 weeks ago and did some plowing and off roading. The true track is as good as the original posi rear. An advanced mechanic can easily install it.
    Date published: 2016-04-18
    Rated 5 out of 5 by from Indestruxtable posi Replaced my broken "pro-series" Auburn that I just bought. I have 60's 2 tenths faster than with the auburn in my LS turbo truck.
    Date published: 2015-08-26
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    Some parts are not legal for use in California or other states with similar laws / regulations