Oldsmobile Toronado (USA / CAN)

Automatic transmission fluid capacity & service interval

Oldsmobile Toronado (USA / CAN) automatic transmission fluid capacity ranges from 3,8 to 11,4 liters. Service intervals include 7500 miles/ 6 months, 12000 miles, 15000 miles, 24000 miles, and 60000 miles. The data covers 4 configurations.

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

TypeSpecifications
Toronado (1976-1978)
  • Use: Normal
  • Capacity 11,4 liter (Dry fill)
  • Capacity 3,8 liter (Service fill)
  • Check 7500 miles/ 6 months
  • Change 60000 miles
  • Code: TH425 3/1
Toronado (1976-1978)
  • Use: Severe
  • Capacity 11,4 liter (Dry fill)
  • Capacity 3,8 liter (Service fill)
  • Check 7500 miles/ 6 months
  • Change 15000 miles
  • Code: TH425 3/1
Toronado (1971-1975)
  • Use: Normal
  • Capacity 9,5 liter (Dry fill)
  • Capacity 3,8 liter (Service fill)
  • Change 24000 miles
  • Code: TH425 3/1
Toronado (1971-1975)
  • Use: Severe
  • Capacity 9,5 liter (Dry fill)
  • Capacity 3,8 liter (Service fill)
  • Change 12000 miles
  • Code: TH425 3/1

Additional Notes

  • The Oldsmobile Toronado automatic transmission carries a dry fill capacity of 9.5 liters for 1971-1975 models, rising to 11.4 liters for 1976-1978 models. Dry fill represents the total fluid volume required when filling a completely empty transmission, including the torque converter and all internal passages.
  • Despite the difference in dry fill capacity between the two model year groups, the service fill capacity remains identical at 3.8 liters across all 1971-1978 configurations. Service fill reflects only the fluid displaced during a routine drain, not the full system volume.
  • For 1971-1975 models under normal use conditions, the automatic transmission fluid change interval is set at 24,000 miles. Under severe use conditions, that same interval is halved to 12,000 miles.
  • The 1976-1978 Toronado automatic transmission carries a normal-use change interval of 60,000 miles, a substantially longer service cycle than the 24,000-mile interval specified for 1971-1975 models under equivalent conditions.
  • Under severe use conditions, the 1976-1978 Toronado automatic transmission fluid change interval is 15,000 miles. While longer than the 12,000-mile severe interval of the 1971-1975 generation, the 1976-1978 severe interval still represents a significant reduction from the 60,000-mile normal-use figure for the same configuration.
  • The 1976-1978 specifications include a fluid level check interval of every 7,500 miles or 6 months, whichever comes first, applicable under both normal and severe use conditions. No equivalent check interval appears in the 1971-1975 specifications.

Other Systems