Isuzu NKR

Manual transmission fluid capacity & service interval

Isuzu NKR manual transmission fluid capacity ranges from 2,6 to 3,2 liters. Service intervals include checks at 10000 km and changes at 20000 km/12 months or 40000 km/24 months. The data covers 10 configurations.

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

TypeSpecifications
NKR 35 (1998-2007)
  • Use: Normal
  • Capacity 2,7 liter
  • Check 10000 km
  • Change 40000 km/ 24 months
  • Code: 5/1
NKR 35 (1998-2007)
  • Use: Severe
  • Capacity 2,7 liter
  • Change 20000 km/ 12 months
  • Code: 5/1
NKR 55 (1996-2007)
  • Use: Normal
  • Capacity 2,7 liter
  • Check 10000 km
  • Change 40000 km/ 24 months
  • Code: 5/1
NKR 55 (1996-2007)
  • Use: Severe
  • Capacity 2,7 liter
  • Change 20000 km/ 12 months
  • Code: 5/1
NKR 58 (1996-2007)
  • Use: Normal
  • Capacity 2,6 liter
  • Check 10000 km
  • Change 40000 km/ 24 months
  • Code: 5/1
NKR 58 (1996-2007)
  • Use: Severe
  • Capacity 2,6 liter
  • Change 20000 km/ 12 months
  • Code: 5/1
NKR 66 (1996-2007)
  • Use: Normal
  • Capacity 3,2 liter
  • Check 10000 km
  • Change 40000 km/ 24 months
  • Code: 5/1
NKR 66 (1996-2007)
  • Use: Severe
  • Capacity 3,2 liter
  • Change 20000 km/ 12 months
  • Code: 5/1
NKR 69 (1996-2007)
  • Use: Normal
  • Capacity 2,7 liter
  • Check 10000 km
  • Change 40000 km/ 24 months
  • Code: 5/1
NKR 69 (1996-2007)
  • Use: Severe
  • Capacity 2,7 liter
  • Change 20000 km/ 12 months
  • Code: 5/1

Additional Notes

  • The Isuzu NKR manual transmission fluid capacity varies by variant. The NKR 35, NKR 55, and NKR 69 each hold 2.7 liters, the NKR 58 holds 2.6 liters, and the NKR 66 holds the largest volume at 3.2 liters.
  • The 3.2-liter capacity of the NKR 66 is notably higher than the other variants in the range. A larger transmission fluid volume generally corresponds to a physically larger gearbox, which is common in heavier-duty truck configurations.
  • The NKR 58 carries a 2.6-liter capacity, making it the lowest figure across all five variants. Even a 0.1-liter difference from the 2.7-liter variants is relevant during a service fill, as underfilling a manual transmission can lead to inadequate lubrication of internal components.
  • Under normal use conditions, all five variants share the same check interval of every 10,000 km. A fluid level check at this interval does not involve a full drain and refill — rather, it is a periodic inspection to confirm the fluid remains at the correct level between full change intervals.
  • The normal-use change interval across all variants is 40,000 km or 24 months, whichever comes first. The time-based limit of 24 months applies regardless of distance traveled, which is relevant for vehicles that accumulate low annual mileage.
  • Under severe use conditions, the change interval for all variants is halved to 20,000 km or 12 months. Severe use typically refers to operating conditions such as frequent heavy loads, stop-and-go traffic, extreme temperatures, or off-road driving, all of which accelerate fluid degradation.
  • No fluid level check interval is listed for severe use conditions across any of the variants. Only the change interval of 20,000 km or 12 months is specified for severe service, in contrast to the normal-use schedule which includes an explicit 10,000 km check interval.
  • The NKR 35 specifications begin from 1998-2007, while the NKR 55, NKR 58, NKR 66, and NKR 69 all carry specifications from 1996-2007. Despite the later start date for the NKR 35, its fluid capacity and service intervals are identical to those of the NKR 55 and NKR 69.

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