Austin Montego

Manual transmission fluid capacity & service interval

Austin Montego manual transmission fluid has a capacity range of 1,5 to 2 liters. Service intervals require checks every 20000 km or 12 months. The data covers 11 configurations.

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

TypeSpecifications
Montego 1.3 (1986-1990)
  • Use: Normal
  • Capacity 1,5 liter
  • Check 20000 km/ 12 months
  • Code: 4/1
Montego 1.3 (1986-1990)
  • Use: Normal
  • Capacity 2 liter
  • Check 20000 km/ 12 months
  • Code: 5/1
Montego 1.6 (1986-1990)
  • Use: Normal
  • Capacity 1,5 liter
  • Check 20000 km/ 12 months
  • Code: 4/1
Montego 1.6 (1986-1990)
  • Use: Normal
  • Capacity 2 liter
  • Check 20000 km/ 12 months
  • Code: 5/1
Montego 2.0 (1986-1990)
  • Use: Normal
  • Capacity 2 liter
  • Check 20000 km/ 12 months
  • Code: 5/1
Montego 2.0i (1986-1990)
  • Use: Normal
  • Capacity 2 liter
  • Check 20000 km/ 12 months
  • Code: 5/1
Montego 1.3 (1984-1986)
  • Use: Normal
  • Capacity 1,5 liter
  • Check 20000 km/ 12 months
  • Code: 4/1
Montego 1.3 (1984-1986)
  • Use: Normal
  • Capacity 2 liter
  • Check 20000 km/ 12 months
  • Code: 5/1
Montego 1.6 (1984-1986)
  • Use: Normal
  • Capacity 1,5 liter
  • Check 20000 km/ 12 months
  • Code: 4/1
Montego 1.6 (1984-1986)
  • Use: Normal
  • Capacity 2 liter
  • Check 20000 km/ 12 months
  • Code: 5/1
Montego 2.0 (1984-1986)
  • Use: Normal
  • Capacity 2 liter
  • Check 20000 km/ 12 months
  • Code: 5/1

Additional Notes

  • Across all Austin Montego manual transaxle configurations from 1984-1990, the check interval is consistently set at 20,000 km or 12 months under normal use conditions, whichever comes first.
  • The 1.3 and 1.6 engine variants list two separate transaxle fluid capacities — 1.5 liters and 2 liters — applying to both the 1984-1986 and 1986-1990 model year ranges. The presence of two distinct capacity figures for the same engine and period reflects different transaxle units fitted across the production run.
  • A 1.5-liter transaxle fluid capacity is a relatively modest fill volume, generally associated with smaller, lighter gearbox assemblies. The 2-liter figure represents a larger fluid volume, typical of a heavier-duty or physically larger transaxle housing.
  • The 2.0 and 2.0i variants carry only the 2-liter transaxle capacity across all listed years, with no 1.5-liter alternative specified for those engine displacements.
  • The 2.0i variant, listed for 1986-1990, shares the same 2-liter transaxle capacity and 20,000 km / 12-month check interval as the non-injected 2.0 of the same period, despite the fuel delivery difference between the two.
  • The overlap year of 1986 appears in both the earlier and later model year groupings for the 1.3 and 1.6 variants. Both groups carry identical capacity options and check intervals, indicating no specification change at that production boundary for those engines.

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