Pontiac Firebird

Manual transmission fluid capacity & service interval

Pontiac Firebird manual transmission fluid capacity ranges from 1,2 liters to 1,65 liters. Service intervals require checks every 6000 miles or 4 months. The data covers 12 configurations.

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

TypeSpecifications
Firebird, SD-455 (1973-1974)
  • Use: Normal
  • Capacity 1,3 liter (Heavy Duty)
  • Capacity 1,65 liter (Standard)
  • Check 6000 miles/ 4 months
  • Code: 3/1
Firebird, SD-455 (1973-1974)
  • Use: Normal
  • Capacity 1,2 liter
  • Check 6000 miles/ 4 months
  • Code: 4/1
Firebird, 455 cu. (1971-1976)
  • Use: Normal
  • Capacity 1,3 liter (Heavy Duty)
  • Capacity 1,65 liter (Standard)
  • Check 6000 miles/ 4 months
  • Code: 3/1
Firebird, 455 cu. (1971-1976)
  • Use: Normal
  • Capacity 1,2 liter
  • Check 6000 miles/ 4 months
  • Code: 4/1
Firebird, 455 H.O. (1971-1974)
  • Use: Normal
  • Capacity 1,3 liter (Heavy Duty)
  • Capacity 1,65 liter (Standard)
  • Check 6000 miles/ 4 months
  • Code: 3/1
Firebird, 455 H.O. (1971-1974)
  • Use: Normal
  • Capacity 1,2 liter
  • Check 6000 miles/ 4 months
  • Code: 4/1
Firebird, 250 cu. (1970-1976)
  • Use: Normal
  • Capacity 1,65 liter (Standard)
  • Check 6000 miles/ 4 months
  • Code: 3/1
Firebird, 250 cu. (1970-1976)
  • Use: Normal
  • Capacity 1,2 liter
  • Check 6000 miles/ 4 months
  • Code: 4/1
Firebird, 350 cu. (1970-1979)
  • Use: Normal
  • Capacity 1,3 liter (Heavy Duty)
  • Capacity 1,65 liter (Standard)
  • Check 6000 miles/ 4 months
  • Code: 3/1
Firebird, 350 cu. (1970-1979)
  • Use: Normal
  • Capacity 1,2 liter
  • Check 6000 miles/ 4 months
  • Code: 4/1
Firebird, 400 cu. (1970-1979)
  • Use: Normal
  • Capacity 1,3 liter (Heavy Duty)
  • Capacity 1,65 liter (Standard)
  • Check 6000 miles/ 4 months
  • Code: 3/1
Firebird, 400 cu. (1970-1979)
  • Use: Normal
  • Capacity 1,2 liter
  • Check 6000 miles/ 4 months
  • Code: 4/1

Additional Notes

  • Across all Pontiac Firebird engine configurations covered in these specifications, the manual transmission fluid check interval is uniform at 6,000 miles or 4 months under normal use conditions, whichever comes first.
  • The 1.65-liter capacity labeled "Standard" appears across the 250 cu., 350 cu., 400 cu., 455 cu., 455 H.O., and SD-455 engine configurations, indicating a widely shared standard-duty gearbox fill volume across the Firebird lineup of this era.
  • The 1.3-liter capacity labeled "Heavy Duty" is listed alongside the 1.65-liter Standard figure for the 350 cu., 400 cu., 455 cu., 455 H.O., and SD-455 configurations, but not for the 250 cu. engine, where only the Standard and 1.2-liter figures appear.
  • A 1.2-liter capacity is listed as a separate entry for every engine configuration in these specifications, representing a smaller-capacity gearbox variant available across the full range of covered engines and model years.
  • The Heavy Duty designation on the 1.3-liter capacity indicates a transmission unit built to handle greater mechanical stress, which corresponds to the higher-displacement and higher-output engines such as the 400 cu., 455 cu., 455 H.O., and SD-455 where such a unit would be more commonly paired.
  • The Pontiac Firebird 250 cu. engine covers model years 1970-1976, a narrower range than the 350 cu. and 400 cu. engines, which span 1970-1979, and the specifications for the 250 cu. do not include a Heavy Duty capacity entry.
  • The SD-455, covered for 1973-1974, shares the same three capacity values and the same 6,000-mile or 4-month check interval as the standard 455 cu. and 455 H.O. configurations, despite being a distinct high-performance variant.
  • The 455 H.O. is specified for 1971-1974, while the standard 455 cu. extends through 1976, and both share identical capacity listings of 1.2 liters, 1.3 liters Heavy Duty, and 1.65 liters Standard.

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