Unimog (MB) 437

Differential fluid capacity & service interval

Unimog 437 differential fluid capacity is 2,5 liters. Service intervals include checking every 300 hours and changing every 1200 hours or 12 months. The data covers 8 configurations.

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

TypeSpecifications
  • U 1350 L U 1500 (437) (1992-2001)
  • Front
  • Use: Normal
  • Capacity 2,5 liter
  • Check 300 hours
  • Change 1200 hours/ 12 months
  • U 1350 L U 1500 (437) (1992-2001)
  • Rear
  • Use: Normal
  • Capacity 2,5 liter
  • Check 300 hours
  • Change 1200 hours/ 12 months
  • U 1800, 1850 L, 1850 L 38 (437) (1992-2001)
  • Front
  • Use: Normal
  • Capacity 2,5 liter
  • Check 300 hours
  • Change 1200 hours/ 12 months
  • U 1800, 1850 L, 1850 L 38 (437) (1992-2001)
  • Rear
  • Use: Normal
  • Capacity 2,5 liter
  • Check 300 hours
  • Change 1200 hours/ 12 months
  • U 2450, 2450 L, 2450 L 38 (437) (1992-2001)
  • Front
  • Use: Normal
  • Capacity 2,5 liter
  • Check 300 hours
  • Change 1200 hours/ 12 months
  • U 2450, 2450 L, 2450 L 38 (437) (1992-2001)
  • Rear
  • Use: Normal
  • Capacity 2,5 liter
  • Check 300 hours
  • Change 1200 hours/ 12 months
  • U 2150, 2150 L, 2150 L 38 (437) (1991-2001)
  • Front
  • Use: Normal
  • Capacity 2,5 liter
  • Check 300 hours
  • Change 1200 hours/ 12 months
  • U 2150, 2150 L, 2150 L 38 (437) (1991-2001)
  • Rear
  • Use: Normal
  • Capacity 2,5 liter
  • Check 300 hours
  • Change 1200 hours/ 12 months

Additional Notes

  • Across all Unimog (MB) 437 variants covered in these specifications, each differential — front and rear — holds exactly 2.5 liters of fluid, a figure that applies uniformly regardless of variant designation or axle position.
  • The 2.5-liter capacity per differential means a complete four-differential service across both axles accounts for a total fluid volume of 10 liters, reflecting the scale of fluid management on a vehicle with both front and rear locking differentials.
  • Service intervals are expressed in operating hours rather than distance, which is standard practice for off-road and utility vehicles where engine hours are a more reliable measure of mechanical wear than kilometers or miles traveled.
  • Under normal use conditions, each differential requires a fluid level check every 300 hours, while a full fluid change is specified at 1,200 hours or 12 months, whichever comes first — meaning the time-based interval can trigger a change before the hour threshold is reached in low-utilization applications.
  • The 1,200-hour change interval means that on a vehicle operated at, for example, 500 hours per year, the annual 12-month calendar limit would govern the service schedule rather than the hour count.
  • The U 2150, 2150 L, and 2150 L 38 variants carry a starting year of 1991, making them the earliest-covered configurations in these specifications, while all other variants — the U 1350 L, U 1500, U 1800, U 1850 L, U 1850 L 38, U 2450, U 2450 L, and U 2450 L 38 — begin from 1992.
  • Despite the variation in model designations and gross weight ratings implied by the numeric suffixes across the 437 range, the differential fluid capacity and service interval specifications are identical for every listed variant, indicating a shared axle architecture across the lineup.

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