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How to Tell if My Mustang GT Automatic Has Traction Lok

The limited-slip differential found in the Ford 8.8-inch rear end is called "Traction-Lok." Locking the rear axles together and equally supplying power to both rear wheels improves traction. As the Mustang GT turns a corner the wheel on the outside of the turn must travel a greater distance, at a greater speed, than the wheel on the inside of the turn. The limited slip differential allows the connection between the two axles to slip and allow the outside wheel to go faster to make the turn smoothly.

Instructions

1

Park the Mustang GT on level ground. Secure the front wheels using wheel chocks. Kick the wheel chocks against the wheels using the heal of your foot so it cannot move while you are under it.

2

Raise and support the Mustang using a floor jack and jack stands. Position the floor jack under the Mustang GTs rear-end (differential) and lift the car until the rear wheels are off the ground. Position jack stands under the rear axles (tubes that connect the differential to the wheels) and lower the car onto the stands.

3

Place the transmission in neutral and release the parking brake. Turn the right rear wheel (by hand) and observe the left rear wheel. If the Mustang GT is equipped with "Traction-Lok" the left rear wheel will turn in the same direction and at the same speed as the right rear wheel. A properly operating limited-slip differential will cause the rear wheels to be difficult to turn by hand.