Austin 18-22/Princess, ADO71

Automatic transmission fluid capacity & service interval

Austin 18-22/Princess, ADO71 automatic transmission fluid capacity ranges from 4,4 to 7,4 liters. Service intervals require checks every 10000 km or 6 months. The data covers 7 configurations.

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

TypeSpecifications
Princess 2 1700 automatic (1978-1981)
  • Use: Normal
  • Capacity 4,4 liter (Service fill)
  • Capacity 7,4 liter (Total)
  • Check 10000 km/ 6 months
  • Code: Borg Warner 3/1
Princess 2 2000 automatic (1978-1981)
  • Use: Normal
  • Capacity 4,4 liter (Service fill)
  • Capacity 7,4 liter (Total)
  • Check 10000 km/ 6 months
  • Code: Borg Warner 3/1
Princess 2 2200 automatic (1978-1981)
  • Use: Normal
  • Capacity 4,4 liter (Service fill)
  • Capacity 7,4 liter (Total)
  • Check 10000 km/ 6 months
  • Code: Borg Warner 3/1
1800 automatic (1975-1975)
  • Use: Normal
  • Capacity 4,4 liter (Service fill)
  • Capacity 7,4 liter (Total)
  • Check 10000 km/ 6 months
  • Code: Borg Warner 3/1
2200 automatic (1975-1975)
  • Use: Normal
  • Capacity 4,4 liter (Service fill)
  • Capacity 7,4 liter (Total)
  • Check 10000 km/ 6 months
  • Code: Borg Warner 3/1
Princess 1800 automatic (1975-1978)
  • Use: Normal
  • Capacity 4,4 liter (Service fill)
  • Capacity 7,4 liter (Total)
  • Check 10000 km/ 6 months
  • Code: Borg Warner 3/1
Princess 2200 automatic (1975-1978)
  • Use: Normal
  • Capacity 4,4 liter (Service fill)
  • Capacity 7,4 liter (Total)
  • Check 10000 km/ 6 months
  • Code: Borg Warner 3/1

Additional Notes

  • All automatic transmission configurations across the Austin 18-22/Princess, ADO71 range use a transaxle layout, meaning the transmission and final drive share a common housing and fluid supply rather than being separate units.
  • The service fill capacity of 4.4 liters represents the amount of fluid required when draining and refilling during a routine service, which does not fully evacuate the torque converter and hydraulic circuits.
  • The total capacity of 7.4 liters reflects the full system volume, including the torque converter, and applies to a complete overhaul or dry-fill situation where the entire transaxle assembly has been disassembled or replaced.
  • The gap between the 4.4-liter service fill and the 7.4-liter total capacity indicates that approximately 3 liters of fluid remains trapped in the torque converter and hydraulic passages during a standard drain, which is typical behavior for automatic transaxle units of this era.
  • The specified check interval of every 10,000 km or 6 months, whichever comes first, applies under normal use conditions across all listed engine variants, from the 1700 through to the 2200.
  • The 1800 and 2200 engine variants from 1975 share identical transaxle fluid capacities and check intervals with the Princess 1800 and Princess 2200 variants introduced in the same year, reflecting a common transaxle unit across the early model range.
  • The Princess 2 series, covering the 1700, 2000, and 2200 automatic variants from 1978-1981, carries forward the same 4.4-liter service fill and 7.4-liter total capacity specifications as the earlier Princess models, indicating continuity in the transaxle design through the model's production run.

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