Pontiac Firebird

Differential fluid capacity & service interval

Pontiac Firebird differential fluid capacity is 2 liters. Service intervals consist of 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)
  • Rear
  • Use: Normal
  • Capacity 2 liter
  • Check 6000 miles/ 4 months
  • Firebird, SD-455 (1973-1974)
  • Rear
  • Use: Normal
  • Capacity 2 liter
  • Check 6000 miles/ 4 months
  • Code: Safe-T-Track
  • Firebird, 455 cu. (1971-1976)
  • Rear
  • Use: Normal
  • Capacity 2 liter
  • Check 6000 miles/ 4 months
  • Firebird, 455 cu. (1971-1976)
  • Rear
  • Use: Normal
  • Capacity 2 liter
  • Check 6000 miles/ 4 months
  • Code: Safe-T-Track
  • Firebird, 455 H.O. (1971-1974)
  • Rear
  • Use: Normal
  • Capacity 2 liter
  • Check 6000 miles/ 4 months
  • Firebird, 455 H.O. (1971-1974)
  • Rear
  • Use: Normal
  • Capacity 2 liter
  • Check 6000 miles/ 4 months
  • Code: Safe-T-Track
  • Firebird, 250 cu. (1970-1976)
  • Rear
  • Use: Normal
  • Capacity 2 liter
  • Check 6000 miles/ 4 months
  • Firebird, 250 cu. (1970-1976)
  • Rear
  • Use: Normal
  • Capacity 2 liter
  • Check 6000 miles/ 4 months
  • Code: Safe-T-Track
  • Firebird, 350 cu. (1970-1979)
  • Rear
  • Use: Normal
  • Capacity 2 liter
  • Check 6000 miles/ 4 months
  • Firebird, 350 cu. (1970-1979)
  • Rear
  • Use: Normal
  • Capacity 2 liter
  • Check 6000 miles/ 4 months
  • Code: Safe-T-Track
  • Firebird, 400 cu. (1970-1979)
  • Rear
  • Use: Normal
  • Capacity 2 liter
  • Check 6000 miles/ 4 months
  • Firebird, 400 cu. (1970-1979)
  • Rear
  • Use: Normal
  • Capacity 2 liter
  • Check 6000 miles/ 4 months
  • Code: Safe-T-Track

Additional Notes

  • Every engine configuration listed for the Pontiac Firebird across the 1970-1979 model years carries a rear differential fluid capacity of 2 liters. In the context of differential service, a 2-liter figure represents a service fill volume, meaning the amount of fluid the housing holds during normal operation rather than a total overhaul or disassembly capacity.
  • The check interval for rear differential fluid is uniform across all listed Firebird configurations at 6,000 miles or 4 months, whichever comes first. The dual-trigger format, combining a mileage threshold with a time-based interval, accounts for vehicles that accumulate low mileage but still age the fluid over calendar time.
  • All rows are designated for normal use conditions, meaning the 6,000-mile or 4-month check interval applies to standard driving rather than severe-duty operation such as towing, off-road use, or frequent short trips.
  • The 250 cu. in. inline-six engine variant spans 1970-1976, while the 350 cu. in. and 400 cu. in. V8 variants both cover the wider 1970-1979 range. Despite the difference in engine displacement and production span, all three share the same 2-liter rear differential capacity and identical check interval.
  • The 455 H.O. (High Output) variant was available from 1971-1974, a narrower window than the standard 455 cu. in. engine, which ran from 1971-1976. Both share the same 2-liter rear differential capacity and 6,000-mile or 4-month check schedule under normal use conditions.
  • The SD-455, covering 1973-1974, represents the shortest production span of any engine variant listed. The SD designation referred to Super Duty, a high-performance factory build. Rear differential fluid capacity for the SD-455 is listed at 2 liters, consistent with all other Firebird configurations in the specifications.

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