MCI Coaches

Automatic transmission fluid capacity & service interval

MCI Coaches require automatic transmission fluid with a capacity of 24,6 liters. Service intervals include 96000 miles or 3000 hours, and 48000 miles. The data covers 2 configurations.

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

TypeSpecifications
D4500, DD60 (2002-2009)
  • Use: Normal
  • Capacity 24,6 liter
  • Change 96000 miles/ 3000 hours
  • Code: Allison B500 6/1
D4500, DD60 (2002-2009)
  • Use: Initial service
  • Capacity 24,6 liter
  • Change 48000 miles
  • Code: Allison B500 6/1

Additional Notes

  • The automatic transmission in MCI Coaches equipped with the D4500 and DD60 engines holds 24.6 liters of fluid, a capacity consistent with heavy-duty commercial coach transmissions designed to manage sustained high-load operation.
  • Under normal use conditions, the transmission fluid change interval is set at 96,000 miles or 3,000 hours, whichever comes first, reflecting a dual-trigger service schedule based on either distance or engine runtime.
  • The initial service interval for the D4500 and DD60 automatic transmission is 48,000 miles, which is half the normal ongoing change interval of 96,000 miles, a common practice in heavy-duty applications to remove break-in contaminants from new or freshly serviced transmission fluid.
  • Both the normal and initial service conditions share the same 24.6-liter fluid capacity, indicating no difference in fill volume between a first-service drain and a standard ongoing service drain for the 2002-2009 model years.

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