Detroit Truetrac Differential
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.


Ford 8.8", 31 Spline, Trac Lock (Not S-Spring)

SKU: TLF8.8-31
$339.37 Regular Price
$293.00Sale Price
    • 1983–1996 Ford Bronco
    • 1997–2006 Ford Expedition
    • 1991–1994 Mazda Navajo
    • 1991–2010 Ford Explorer
    • 2001–2010 Ford Explorer Sport Trac
    • 1997–2010 Mercury Mountaineer
    • 1983–2014 Ford F-150 1/2 Ton
    • 1994–2014 Ford Mustang (Most Mustang used 28 Spline)
    • 2003–2007 Ford Ranger FX4 Level II


*Many products will require the use of a direct shipping quote from one of our CSR agents due to new DIM weights and measure changes as of Jan 10th, 2018 from major carriers.

Packages greater than a square cubic foot are now required to use a “volumetric weight” based upon length, width, height of a package from most carriers which alters actual weights. Oversized / Unique shaped packages are most affected and may not apply to your specific purchase(s). However, IN ORDER to save you, the customer, shipping costs, associated fees, and to keep product costs down, we are taking action to give direct shipping quotes based upon delivery methods available. Your full name and email address, required in the checkout, is so we can offer you a shipping quote. Your item(s) will NOT ship without communication from our CSR agents. We apologize for any inconveniences.*