Ranger (GM) Ranger B (II)

Automatic transmission fluid capacity & service interval

Ranger (GM) Ranger B (II) automatic transmission fluid capacity is 2,5 liters. Service intervals include checks every 10000 km or 6 months and changes every 40000 km or 24 months. The data covers 6 configurations.

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

TypeSpecifications
2800 GTS (1974-1978)
  • Use: Normal
  • Capacity 2,5 liter (Refill)
  • Check 10000 km/ 6 months
  • Change 40000 km/ 24 months
  • Code: THM 180 3/1
1700 (1972-1978)
  • Use: Normal
  • Capacity 2,5 liter (Refill)
  • Check 10000 km/ 6 months
  • Change 40000 km/ 24 months
  • Code: THM 180 3/1
1700S (1972-1978)
  • Use: Normal
  • Capacity 2,5 liter (Refill)
  • Check 10000 km/ 6 months
  • Change 40000 km/ 24 months
  • Code: THM 180 3/1
1900 (1972-1978)
  • Use: Normal
  • Capacity 2,5 liter (Refill)
  • Check 10000 km/ 6 months
  • Change 40000 km/ 24 months
  • Code: THM 180 3/1
2500 (1972-1978)
  • Use: Normal
  • Capacity 2,5 liter (Refill)
  • Check 10000 km/ 6 months
  • Change 40000 km/ 24 months
  • Code: THM 180 3/1
2500 GTS (1972-1974)
  • Use: Normal
  • Capacity 2,5 liter (Refill)
  • Check 10000 km/ 6 months
  • Change 40000 km/ 24 months
  • Code: THM 180 3/1

Additional Notes

  • The 2.5-liter refill capacity listed across all Ranger B (II) variants represents the amount of fluid needed to top up the automatic transmission during a service, not the total system volume required when the unit is fully drained or overhauled.
  • All six variants share an identical fluid check interval of every 10,000 km or 6 months, whichever comes first, under normal use conditions.
  • The fluid change interval for every variant is set at 40,000 km or 24 months under normal use, meaning the schedule applies to standard operating conditions rather than demanding or high-stress driving environments.
  • The GM Ranger B (II) 1700 and 1700S variants, despite differing in trim designation, carry the same 2.5-liter refill capacity and identical check and change intervals as the larger-displacement 1900 and 2500 variants.
  • The 2500 GTS was produced from 1972-1974, while the 2800 GTS entered production in 1974-1978, suggesting a displacement increase within the GTS line at the 1974 model year boundary, though both share the same 2.5-liter ATF refill specification.
  • The uniformity of the 2.5-liter refill figure across all engine displacements, from the 1700 through the 2800 GTS, points to a common automatic transmission unit being used throughout the Ranger B (II) range during the 1972-1978 production period.

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