Differential Check - Trac-Lok(R) Road Test (Dana)

Driveline System







Component Tests

Differential Check - Trac-Lok(R) Road Test (Dana)

1. Drive the vehicle for at least 10 miles to warm up the axle lubricant.
- More miles may be necessary depending on the outside temperature.

2. Drive the vehicle in a tight circle for 5 minutes and then in the opposite direction for another 5 minutes.

3. Make a minimum of 10 figure-8 turns.

4. If chatter is still present, drain and refill the axle with the specified type and amount of lubricant and friction modifier. Refer to Specifications.

5. Carry out the road test again.
- There might be a slight chatter. If the chatter persists after 160 km (100 miles) of vehicle operation, install a new differential.

Contact Pattern Location

In general, desirable ring gear tooth patterns must have the following characteristics:

- Drive pattern on the drive side differential ring gear well centered on the tooth.
- Coast pattern on the coast side differential ring gear well centered on the tooth.
- Clearance between the pattern and the top of the tooth.
- No hard lines where the pressure is high.

Acceptable differential ring gear tooth patterns for all axles.






Correct backlash with a thinner pinion position shim as necessary.






Correct backlash with a thicker pinion position shim as necessary.






Correct pinion position shim that requires a decrease in backlash.






Correct pinion position shim that requires an increase in backlash.