Running in a New Ring & Pinion

Any new differential if OEM or after market comes with a chemical coating. This coating can only be removed by the differential oil in a controlled process, failure to run in a new differential could mean the metal becomes brittle and eventually breaks.

The oil however cannot remove the chemical coating if the oil has been driven constantly without the correct heating and cooling down process. If your Jeep Wrangler is driven without heating and cooling down something in the oil changes and cannot absorb the chemical as it should.

The process should be as follows:

  • 40km drive at a maximum speed of 80kmh
  • Stop and let cool down for 1 hour between drives

Repeat the above 3 times (In total 120km)

  • 120km drive at a maximum speed of 80kmh
  • Stop and let cool down for 1 hour between drives

Repeat the above 2 times

  • 180km drive at a maximum speed of 100kmh
  • Stop and let cool down for 1 hour between drives

Repeat the above 2 times

Take your Jeep Wrangler back to Jeepers and get them to clean the inside of the differential housing, clean the magnet and refill with fresh oil. Once done then drive 50km at a maximum speed of 120kmh

Go offroad when you can
Note: there is no minimum time limit to it at all, as long as between the drives there is a minimum of a 1 hour cool down period