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Trailquest Jeep® Parts
7888 Memorial Drive
Plain City, OH 43064
Local Calls 614-873-8337

Restoration, Replacement, & Off-Road
Jeep Parts


TO ORDER CALL TOLL FREE 1-800-770-2617

Lockers 101Lockers 101
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DETROIT TRUETRAC® LOCKERS
Detroit Truetrac Locker


exploded view of TrueTrac Locker
line

Experience maximum True Traction with the Detroit TrueTrac Torque Proportioning Differential, commonly known as Limited Slip Differential.

Without a differential all four wheels turn at equal speed around corners. Tires skid and axle shafts actually work against each other. Conventional differentials have a severe limitation. When you encounter a loose traction surface, a standard differential directs power to the wheel with the least resistance and the wheel on the loose surface spins hopelessly, while the opposite wheel, on a better traction surface, literally stands still. Bottom line .. You're stuck!

The Detroit TrueTrac features a gear-type limited slip design (no clutch or friction plates to wear out). Designed for medium duty 2WD and 4WD applications, this positive gear action provides a quiet, automatic splitting of torque, without creating the steering problems associated with other traction differentials. Power transfer goes literally unnoticed by the driver.

  • Detroit TrueTrac Lockers in a Nutshell:
    • Automatic operation. No buttons or switches to manually engage
    • Gears Only - No clutch for friction plates to wear out
    • Performs like standard (open) differential in normal driving
    • Ideal for 4WD front axles or rear axles, as well as 2WD: light trucks, SUV's, and cars
    • Rugged yet smooth and quiet
    • Torque bias ratios of 2.5 to 3.5:1 range
    • Easy bolt-in installation
YEAR MODEL APPLICATION SPLINE RATIO PART # PRICE
2007-12 Wrangler JK 4 Door Dana 30 27 3.73 – 5.38 TT – 912A585 $436.95
2004-06 Wrangler Unlimited Dana 30 27 3.73 – 5.38 TT – 912A585 $436.95
2004-06 Wrangler Unlimited Dana 44 30 3.73 – 2.73 TT – 913A591 $505.95
1999-02 Grand Cherokee WJ Dana 35 27 3.54 – 5.38 TT – 912A569 $436.95
1997-06 Wrangler TJ Dana 30 27 3.07 – 3.54 TT – 912374 $585.95
3.73 – 5.38 TT – 912A585 $436.95
1997-06 Wrangler TJ Dana 44 30 3.73 – 2.73 TT – 913A591 $505.95
1997-02 Wrangler TJ Dana 35 27 3.54 – 5.38 TT – 912A569 $436.95
1997-02 Wrangler TJ Dana 44 30 3.92 – 5.38 TT – 913A590 $505.95
1993-98 Grand Cherokee ZJ Dana 35 27 3.54 – 5.38 TT – 912A569 $436.95
1992-01 Cherokee XJ Dana 30 27 3.07 – 3.54 TT – 912374 $585.95
3.73 – 5.38 TT – 912A585 $436.95
1987-95 Wrangler YJ Dana 35 27 3.54 – 5.38 TT – 912A569 $436.95
1987-95 Wrangler YJ Dana 44 30 3.73 – 2.73 TT – 913A591 $505.95
1987-95 Wrangler YJ Dana 30 27 3.07 – 3.54 TT – 912374 $585.95
3.73 – 5.38 TT – 912A585 $436.95
1984-01 Cherokee XJ Dana 35 27 3.54 – 5.38 TT – 912A569 $436.95
1981-85 CJ8 Dana 30 27 3.07 – 3.54 TT – 912374 $585.95
3.73 – 5.38 TT – 912A585 $436.95
1981-85 CJ8 Dana 44 30 3.73 – 2.73 TT – 913A591 $505.95
1976-86 CJ7 Dana 44 30 3.73 – 2.73 TT – 913A591 $505.95
1976-86 CJ7 Dana 30 27 3.07 – 3.54 TT – 912374 $585.95
3.73 – 5.38 TT – 912A585 $436.95
1970-75 CJ Dana 44 30 3.92 – 5.38 TT – 913A590 $505.95
Detroit Truerac Lockers
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