Marshall All models

Differential fluid capacity & service interval

Marshall All models use differential fluid with a capacity of 6 liters. Service intervals include checking at 50 hours and changing at 1200 hours. The data covers 6 configurations.

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

TypeSpecifications
  • 602 (1982-1990)
  • Front
  • Use: Normal
  • Capacity 6 liter
  • Check 50 hours
  • Change 1200 hours
  • Code: (4x4)
  • 604 (1982-1990)
  • Front
  • Use: Normal
  • Capacity 6 liter
  • Check 50 hours
  • Change 1200 hours
  • Code: (4x4)
  • 702 (1982-1990)
  • Front
  • Use: Normal
  • Capacity 6 liter
  • Check 50 hours
  • Change 1200 hours
  • Code: (4x4)
  • 704 (1982-1990)
  • Front
  • Use: Normal
  • Capacity 6 liter
  • Check 50 hours
  • Change 1200 hours
  • Code: (4x4)
  • 802 (1982-1990)
  • Front
  • Use: Normal
  • Capacity 6 liter
  • Check 50 hours
  • Change 1200 hours
  • Code: (4x4)
  • 804 (1982-1990)
  • Front
  • Use: Normal
  • Capacity 6 liter
  • Check 50 hours
  • Change 1200 hours
  • Code: (4x4)

Additional Notes

  • All six Marshall models covered by these specifications — the 602, 604, 702, 704, 802, and 804 — share an identical front differential fluid capacity of 6 liters across the full 1982-1990 production span.
  • A 6-liter front differential capacity is a relatively substantial fill volume, consistent with heavy-duty or agricultural equipment differentials rather than light passenger vehicle axles, where front differential capacities typically fall well below 2 liters.
  • The check interval of 50 hours under normal use conditions is an hour-based service schedule, which is standard practice for off-road, agricultural, or industrial machinery where operating hours are a more reliable wear indicator than distance traveled.
  • The 1200-hour fluid change interval under normal use conditions represents a long service cycle in hour-based maintenance terms, reflecting the expectation that front differential fluid in these models remains serviceable across extended heavy-duty operation before a full drain and refill is required.
  • The ratio between the check interval and the change interval across all six models is 24 to 1, meaning the fluid level is inspected 24 times for every single complete fluid change under normal use conditions.
  • No variation exists in front differential fluid capacity or service intervals across the 602, 604, 702, 704, 802, and 804 model designations for 1982-1990, indicating a shared front differential assembly or at minimum a shared fluid system specification across the entire Marshall lineup during that period.

Other Systems