Unimog (MB) 408, 418

Manual transmission fluid capacity & service interval

Unimog (MB) 408 and 418 models require manual transmission fluid with a capacity of 6 liters. Service intervals include checking every 800 hours and changing every 1600 hours or 24 months. The data covers 3 configurations.

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

TypeSpecifications
U 110 (418) (1992-2000)
  • Use: Normal
  • Capacity 6 liter
  • Check 800 hours
  • Change 1600 hours/ 24 months
  • Code: 8/8
U 140 (418) (1992-2000)
  • Use: Normal
  • Capacity 6 liter
  • Check 800 hours
  • Change 1600 hours/ 24 months
  • Code: 8/8
U 90 (408) (1992-2000)
  • Use: Normal
  • Capacity 6 liter
  • Check 800 hours
  • Change 1600 hours/ 24 months
  • Code: 8/8

Additional Notes

  • The Unimog (MB) 408 and 418 series manual transmissions share an identical fluid capacity of 6 liters across all three configurations covered — the U 90, U 110, and U 140.
  • A 6-liter service fill capacity is a relatively substantial volume for a manual transmission, reflecting the heavy-duty, multi-range gearbox architecture typical of utility vehicles in the Unimog lineage.
  • Fluid level checks are specified at 800-hour intervals under normal use conditions, a time-based approach suited to the operational patterns of work vehicles that accumulate hours rather than road mileage.
  • Fluid changes are due at 1,600 hours or 24 months under normal use conditions, whichever comes first, meaning calendar time can trigger a service event even when the hour threshold has not been reached.
  • The 1,600-hour change interval is exactly double the 800-hour check interval, establishing a structured two-check cycle between each full fluid replacement.
  • All three variants — the U 90 (408), U 110 (418), and U 140 (418) — carry identical check and change intervals, indicating no differentiation in service scheduling between the 408 and 418 series for manual transmission fluid.

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