Cadillac Fleetwood (USA / CAN)

Automatic transmission fluid capacity & service interval

Cadillac Fleetwood automatic transmission fluid capacity ranges from 3,4 liters to 10,9 liters. Service intervals include checks at 10000 km or 4 months and changes at 36000 km or 24 months. The data covers 4 configurations.

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

TypeSpecifications
Fleetwood (1970-1974)
  • Use: Normal
  • Capacity 10,5 liter
  • Capacity 3,8 liter (Refill)
  • Check 10000 km/ 4 months
  • Change 36000 km/ 24 months
  • Code: Turbo-Hydramatic THM400 3/1
Fleetwood (1968-1969)
  • Use: Normal
  • Capacity 10,5 liter
  • Capacity 3,8 liter (Refill)
  • Check 10000 km/ 4 months
  • Change 36000 km/ 24 months
  • Code: Turbo-Hydramatic THM400 3/1
Fleetwood (1965-1967)
  • Use: Normal
  • Capacity 10,9 liter (Dry fill)
  • Capacity 8,5 liter (Refill)
  • Check 10000 km
  • Change 36000 km/ 24 months
  • Code: Hydra-Matic 3/1
Fleetwood (1965-1967)
  • Use: Normal
  • Capacity 10,5 liter
  • Capacity 3,4 liter (Refill)
  • Check 10000 km
  • Change 36000 km/ 24 months
  • Code: Turbo-Hydramatic THM400 3/1

Additional Notes

  • The 1965-1967 Cadillac Fleetwood carries two separate automatic transmission capacity entries, one showing a dry fill of 10.9 liters alongside a refill of 8.5 liters, and another showing a total capacity of 10.5 liters with a refill of only 3.4 liters, reflecting two distinct transmission configurations present in that model year range.
  • A dry fill value of 10.9 liters in the first 1965-1967 entry represents the total fluid volume required when filling a completely drained or newly assembled transmission, while the 8.5-liter refill figure applies when fluid is only partially evacuated during a standard service.
  • The second 1965-1967 configuration shows a notably smaller refill capacity of 3.4 liters compared to the 8.5 liters in the first entry, indicating a transmission design where a routine fluid change displaces a much smaller portion of the total 10.5-liter system volume.
  • Starting with the 1968-1969 model years, the refill capacity increased to 3.8 liters from the 3.4 liters seen in the second 1965-1967 configuration, while the total capacity of 10.5 liters remained unchanged.
  • The 1970-1974 Fleetwood shares identical automatic transmission specifications with the 1968-1969 model years, holding a total capacity of 10.5 liters and a refill volume of 3.8 liters under normal use conditions.
  • A fluid check interval tied to both distance and time appears in the 1968-1974 entries, specifying 10,000 km or 4 months, whereas the 1965-1967 entries list only a distance-based check interval of 10,000 km without a time component.
  • Across all four entries spanning 1965-1974, the fluid change interval under normal use conditions is consistently set at 36,000 km or 24 months, whichever comes first.

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