Acura RDX, TB3, TB4 (USA / CAN)

Transfer case fluid capacity & service interval

Acura RDX, TB3, TB4 (USA / CAN) models require transfer case fluid with a capacity of 0,41 liter. Service intervals include changes at 30000 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
RDX 3.5 i-VTEC V6 AWD (2015-2018)
  • Use: Severe
  • Capacity 0,41 liter
  • Change 30000 miles
RDX 3.5 i-VTEC V6 AWD (2015-2018)
  • Use: Flexible (on board maintenance system)
  • Capacity 0,41 liter
RDX 3.5 i-VTEC V6 AWD (2015-2018)
  • Use: Severe, first change only
  • Capacity 0,41 liter
  • Change 60000 miles
RDX 3.5 i-VTEC V6 AWD (2012-2015)
  • Use: Normal
  • Capacity 0,41 liter

Additional Notes

  • The transfer case fluid capacity across all listed Acura RDX 3.5 i-VTEC V6 AWD configurations from 2012-2018 is 0.41 liter, a figure consistent with a service fill rather than a full overhaul volume, as transfer cases of this size typically hold only a small quantity of fluid by design.
  • For the 2015-2018 RDX 3.5 i-VTEC V6 AWD under severe use conditions, the transfer case fluid change interval is specified at 30,000 miles, reflecting the more frequent servicing associated with demanding operating environments such as towing, off-road use, or extreme temperatures.
  • A separate severe-use entry for the 2015-2018 RDX 3.5 i-VTEC V6 AWD designates a first-change-only interval of 60,000 miles, which represents an initial break-in service milestone distinct from the ongoing 30,000-mile severe-use cycle.
  • The 2015-2018 RDX 3.5 i-VTEC V6 AWD also carries a flexible interval tied to the on-board maintenance system, meaning the vehicle's monitoring system determines when a fluid change is due rather than a fixed mileage figure, with the 0.41-liter capacity remaining unchanged regardless of which interval method is followed.
  • The 2012-2015 RDX 3.5 i-VTEC V6 AWD transfer case specification lists only a normal-use condition with the 0.41-liter capacity and no associated mileage interval, whereas the 2015-2018 generation carries multiple use-condition entries including severe and flexible interval designations.

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