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

WARNING: This page is about a different car, the 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  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.
  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.
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