Vauxhall Monterey B, M98

Manual transmission fluid capacity & service interval

Vauxhall Monterey B, M98 manual transmission fluid capacity is 2,95 liters. Service intervals include checks every 15000 km or 12 months and changes every 45000 km or 36 months. The data covers 2 configurations.

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

TypeSpecifications
Monterey B 3.0 TD (1998-2000)
  • Use: Normal
  • Capacity 2,95 liter
  • Check 15000 km/ 12 months
  • Change 45000 km/ 36 months
  • Code: MUA5CT 5/1
Monterey B 3.5 V6 (1998-2000)
  • Use: Normal
  • Capacity 2,95 liter
  • Check 15000 km/ 12 months
  • Change 45000 km/ 36 months
  • Code: MUA5CT 5/1

Additional Notes

  • Both the 3.0 TD and 3.5 V6 variants of the Vauxhall Monterey B share an identical manual transmission fluid capacity of 2.95 liters, indicating a common gearbox unit across these two otherwise mechanically distinct engine configurations.
  • The 2.95-liter figure represents a service fill capacity, which is the volume required when refilling a transmission already installed in the vehicle, rather than a full overhaul or bench-fill quantity.
  • Under normal use conditions, the fluid check interval is set at 15,000 km or 12 months, whichever comes first, applying equally to both the 3.0 TD and 3.5 V6 across the 1998-2000 model years.
  • The fluid change interval under normal use conditions is 45,000 km or 36 months, meaning a full drain and refill of the 2.95-liter capacity is expected once every three years or at that mileage threshold for both engine variants.
  • The ratio between the check interval and the change interval is exactly 1:3, meaning three inspection cycles are completed before a fluid change is due, which is a structured approach to monitoring fluid condition progressively over time.

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