Honda Ridgeline, YK1 (USA / CAN)

Additional Notes

• The Honda Ridgeline YK1 transfer case carries a dry fill capacity of 0.45 liter and a service fill capacity of 0.43 liter on 2006-2008 3.5 V6 configurations. The difference between these two figures reflects the small volume of fluid that remains in the unit during a standard drain, meaning a complete overhaul or dry assembly requires slightly more fluid than a routine service change.
• Under severe use conditions, the 2006-2008 3.5 V6 transfer case fluid carries a defined change interval of 30,000 miles. Severe use classifications typically account for operating conditions such as frequent towing, off-road driving, or repeated short trips that accelerate fluid degradation beyond what normal driving would produce.
• The same 2006-2008 3.5 V6 configuration also lists a flexible interval tied to the on-board maintenance system, with no fixed mileage figure attached. In place of a set interval, the vehicle's monitoring system determines when a fluid change is due based on operating data, and the capacity figures of 0.45 liter dry and 0.43 liter service fill remain unchanged regardless of which interval method applies.
• For the 2009-2011 3.5 V6, the transfer case capacity is expressed as a range of 0.43-0.45 liter rather than two distinct dry and service fill values. A range presentation of this kind typically accounts for minor variation in the amount of fluid retained after draining, rather than specifying separate overhaul and service quantities as separate entries.
• The 2009-2011 3.5 V6 transfer case interval is governed solely by the on-board maintenance system, with no severe-use fixed mileage interval listed for those model years, in contrast to the 2006-2008 configuration where both a severe-use interval and a flexible interval appear as separate entries.