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| DETROIT TRUETRAC® LOCKERS |
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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.
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- Detroit TrueTrac Lockers in a Nutshell:
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- Automatic operation. No buttons or switches to manually engage
- Gears Only - No clutch for friction plates to wear out
- Improved design 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
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| All Detroit TrueTrac Lockers are $395.00 |
| YEAR |
MODEL |
APPLICATION |
RATIO |
PART # |
| 1972-03 |
CJ, YJ, TJ |
Dana 30 front |
2.73 – 3.54 |
TT – 912374 |
| 3.73 – 5.38 |
TT – 912314 |
| 1987-2001 |
YJ, TJ |
Dana 35 rear |
3.54 – 5.38 |
TT – 912310 |
| 1970-75 & 86 |
CJ |
Dana 44 rear; 30 spline |
3.73 – 3.72 |
TT – 913312 |
| 1997-02 |
TJ |
Dana 44 rear; 30 spline |
3.73 – 3.72 |
TT – 913312 |
| 1970-75 & 86 |
CJ |
Dana 44 rear; 30 spline |
3.92 – 5.38 |
TT – 913313 |
| 1997-02 |
TJ |
Dana 44 rear; 30 spline |
3.92 – 5.38 |
TT – 913313 |

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