Opel Astra F, T92

Automatic transmission fluid capacity & service interval

Opel Astra F, T92 automatic transmission fluid capacity ranges from 3 to 3,5 liters. Service intervals occur every 24 months or 30000 km. The data covers 3 configurations.

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

TypeSpecifications
Astra F 1.4i (1994-1998)
  • Use: Normal
  • Capacity 3 liter
  • Check 24 months/ 30000 km
  • Code: AF 13 4/1
Astra F 1.4Si (1991-1998)
  • Use: Normal
  • Capacity 3 liter
  • Check 24 months/ 30000 km
  • Code: AF 13 4/1
Astra F 1.8i (1991-1994)
  • Use: Normal
  • Capacity 3,5 liter
  • Check 24 months/ 30000 km
  • Code: AF 20 4/1

Additional Notes

  • The Opel Astra F, T92 automatic transaxle specifications cover three engine variants across the 1991-1998 model range, with fluid capacities that differ based on engine displacement.
  • The 1.4Si and 1.4i variants share an identical automatic transaxle fluid capacity of 3 liters, indicating a common transmission unit across both four-cylinder configurations.
  • The 1.8i carries a notably higher automatic transaxle fluid capacity of 3.5 liters, a difference of 0.5 liters compared to the 1.4-liter variants, which reflects a physically larger transmission assembly suited to the higher-displacement engine.
  • A capacity figure listed as a service fill represents the amount of fluid required during a routine fluid service, rather than a full overhaul or dry fill, which would typically demand a greater volume to account for fluid retained within the torque converter and cooler lines.
  • All three variants share the same service interval under normal use conditions: a fluid check every 24 months or 30,000 km, whichever comes first. The dual-trigger format means the interval is governed by whichever threshold is reached earlier.
  • The 1.4i variant entered the specification range in 1994, while the 1.4Si was already listed from 1991, meaning both 1.4-liter automatic transaxle variants ran concurrently from 1994-1998 with identical fluid requirements.
  • The 1.8i automatic transaxle specification applies only to the 1991-1994 period, a narrower window than the 1.4-liter variants, and carries the largest fluid capacity among all three listed configurations at 3.5 liters.

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