McCormick MC

Differential fluid capacity & service interval

McCormick MC differential fluid capacity ranges from 2,2 to 6 liters. Service intervals include checking at 250 hours and changing at 500 or 1000 hours. The data covers 7 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
  • MC120 Power 6 (2003-2007)
  • Front
  • Use: Normal
  • Capacity 6 liter
  • Check 250 hours
  • Change 500 hours
  • Code: MFD
  • MC120 Power 6 (2003-2007)
  • Independent Front Suspension
  • Use: Normal
  • Capacity 2,2 liter
  • Check 250 hours
  • Change 500 hours
  • MC135 Power 6 (2003-2007)
  • Front
  • Use: Normal
  • Capacity 6 liter
  • Check 250 hours
  • Change 500 hours
  • Code: MFD
  • MC135 Power 6 (2003-2007)
  • Independent Front Suspension
  • Use: Normal
  • Capacity 2,2 liter
  • Check 250 hours
  • Change 500 hours
  • MC100 (2001-2002)
  • Front
  • Use: Normal
  • Capacity 6 liter
  • Check 250 hours
  • Change 1000 hours
  • Code: (4x4)
  • MC80 (2001-2002)
  • Front
  • Use: Normal
  • Capacity 5 liter
  • Check 250 hours
  • Change 1000 hours
  • Code: (4x4)
  • MC90 (2001-2002)
  • Front
  • Use: Normal
  • Capacity 6 liter
  • Check 250 hours
  • Change 1000 hours
  • Code: (4x4)

Additional Notes

  • The McCormick MC front differential holds either 5 or 6 liters depending on the model, with the MC80 (2001-2002) specified at 5 liters and the MC90, MC100, MC120 Power 6, and MC135 Power 6 all specified at 6 liters for the standard front differential configuration.
  • On MC120 Power 6 and MC135 Power 6 units equipped with independent front suspension, the front differential capacity drops to 2.2 liters, a notably smaller figure compared to the 6-liter capacity of the standard front differential on the same models.
  • All models across the 2001-2007 range share a consistent fluid check interval of 250 hours under normal use conditions, regardless of model variant or suspension configuration.
  • The MC80, MC90, and MC100 from 2001-2002 carry a front differential fluid change interval of 1000 hours under normal use, which is twice as long as the 500-hour change interval specified for the MC120 Power 6 and MC135 Power 6 from 2003-2007.
  • The 500-hour change interval on the MC120 Power 6 and MC135 Power 6 applies equally to both the standard front differential and the independent front suspension variant, even though the two configurations differ significantly in fluid capacity.
  • The 2.2-liter capacity on the independent front suspension differential of the MC120 Power 6 and MC135 Power 6 reflects a physically smaller housing typical of independent suspension axle designs, where the differential unit is separated from the wheel-end components rather than sharing a common fluid volume with them.

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