Morgan All models

Differential fluid capacity & service interval

Morgan All models use differential fluid with a capacity range of 1 to 1,6 liters. Service intervals require a change every 8000 km or 6 months. The data covers 4 configurations.

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

TypeSpecifications
  • Plus 4 16 valve (1988-1993)
  • Rear
  • Use: Normal
  • Capacity 1 liter
  • Change 8000 km/ 6 months
  • Code: (4x2)
  • Plus 4 (1985-1988)
  • Rear
  • Use: Normal
  • Capacity 1 liter
  • Change 8000 km/ 6 months
  • Code: (4x2)
  • 4/4 1600 (1981-1990)
  • Rear
  • Use: Normal
  • Capacity 1 liter
  • Change 8000 km/ 6 months
  • Code: (4x2)
  • Plus 8 (1981-1993)
  • Rear
  • Use: Normal
  • Capacity 1,6 liter
  • Change 8000 km/ 6 months
  • Code: (4x2)

Additional Notes

  • Across the 4/4 1600, Plus 4, and Plus 4 16 valve, the rear differential capacity is rated at 1 liter under normal use conditions.
  • The Morgan Plus 8 (1981-1993) carries a rear differential capacity of 1.6 liters under normal use conditions, which is 60% greater than the 1-liter figure shared by the other models in the same period.
  • The larger differential capacity on the Plus 8 reflects the greater physical size of the rear differential unit typically paired with higher-displacement, higher-torque V8 powertrains.
  • All four configurations share an identical service interval of 8,000 km or 6 months under normal use conditions, whichever comes first.
  • The 6-month time-based interval alongside the 8,000 km distance interval means fluid changes are triggered by calendar time even when mileage accumulation is low, which is common in differential service schedules for vehicles that may see infrequent use.
  • The Morgan 4/4 1600 covers the 1981-1990 model years, while the Plus 4 spans 1985-1988 and the Plus 4 16 valve spans 1988-1993, meaning the three four-cylinder variants overlap across portions of the covered period.
  • The 1-liter rear differential capacity across the four-cylinder models is a relatively modest fill volume, consistent with compact rear axle units commonly found in lightweight sports cars of the era.

Other Systems