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

WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 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. For additional information, refer to Specifications in this article.
  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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