Differential Check - Trac-Lok® Road Test (Dana)
- Drive the vehicle for at least ten miles to warm up the axle lubricant.
- More miles may be necessary depending on the outside temperature.
- Drive the vehicle in a tight circle for five minutes and then in the opposite direction for another five minutes.
- Make a minimum of ten figure-eight turns.
- If chatter is still present, drain and refill the axle with the specified type and amount of lubricant and friction modifier. Refer to Specifications .
- 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.