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Eaton Detroit Truetrac Limited Slip Differential Dana 44

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Product Details

Eaton Detroit Truetrac Limited Slip Differentials!  These helical gear differentials are designed to provide a quiet, automatic torque split.  Performs like a standard / open differential during normal driving conditions, and then transfers torque automatically to the wheel with better traction when one side starts to slip.

The internal helical-shaped gears then mesh with increased force until wheel spin has slowed or stopped completely.  As soon as the vehicle is back to regular traction, the limited slip resumes normal operation.

The Truetrac is smooth, quiet and automatic.  It will automatically engage without any driver knowledge or action required.   Also, it doesn't have any wearable parts and requires zero maintenance, meaning less time turning wrenches, and more time driving!


  • Helical-style gears
  • Limited-slip Operation (better road manners than a locker)
  • Smooth / Automatic Engagement - no input needed
  • Maintenance Free
  • Increased Performance and Durability

  • Fits All with Dana 44 Front and Rear (1969-2009)
  • 30-Spline
  • Available Front and Rear
  • 3.73-down (numerically) or 3.92-up (numerically)
  • Maintenance Free
  • Smooth / Automatic Engagement - no input needed
  • Helical-style gears

Reviews (1)

  • A real time safer

    Posted by David Smith on Nov 26th 2019

    I highly recommend this for type of work that I do. Installed in Dana 44 front differential of 1977 J20 (Jeep), with a 360 V8, 4 speed with a Dana 20 transfer case (tires BFG 285/75r16 @26 psi). This works very smoothly with both front tires pulling over rocks thru mud and snow. In summer we carry a 275 gal water tank, a gas powered water pump with hoses. In winter carry a 100 gal water tank for the stock which is refilled every day prior to watering. In the pass my wife would drive across our irrigated field with about 4 inches of water on it with her friends talking with the radio on, in first gear idling and get stuck climbing out of the field. I had no problems crossing in 3 gear using some speed. Now my wife can drive about any way she wants and no problems. In the pass I would have to turn the flood irrigation system off in the field for three days to dry the field out and use the winch to pull the pickup out. No one is stuck and the farming is getting done!!