Dog-Tracking

INSPECTION
1. The vehicle, by design, has a front tread that is wider than the rear tread.
2. The front tread is the distance between the two front tires, and likewise the rear. The illustration shows these differences.





3. When a vehicle with these tread differences is driven on a crowned road, the front may tend to ride higher than the rear, making the vehicle appear to dog-track, as illustrated. Refer to Diagnosis.

DIAGNOSIS
1. Find an empty stretch of road or parking lot.
2. Drive the vehicle while sighting down the hood or the body style line to see if the vehicle is going in a straight line or dog-tracking.
3. Stop the vehicle when you notice it dog-tracking. Have an assistant mark the position of the center tread of both front tires with chalk on the ground.
4. Slowly pull the vehicle forward until the rear tires are at the same position as the marks made for the front tires.
5. Have an assistant mark the ground as was done for the front tires, identifying which marks are for the front tires and which marks are for the rear tires.
6. Move the vehicle out of the way so all of the marks can be seen.





7. Proceed to measure the total amount of dog-tracking as follows:
a. Measure the distance (A) between the front tire marks.
b. Mark the ground exactly halfway between these marks.
c. Measure the distance (B) between the rear tire marks.
d. Mark the ground exactly halfway between these marks.
e. The difference between the two center marks is the amount of dog-tracking present in the vehicle (C).