Transfer case fluid is a lubricant that aids the operation of a vehicle's transfer case. The transfer case is a metal enclosure that houses the differential and other gears to provide a single, simplified power source for the transmission. It is advised to replace the transfer case fluid every 30,000 to 60,000 kilometers, depending on the vehicle's make and model. If the vehicle is slipping or experiencing difficulties transitioning between gears, it could point to a problem with the transfer case fluid. If you are driving and you notice any of these symptoms, it's crucial to bring your vehicle to a trusted repair shop. At GarageMatch, we connect users with qualified repair shops through our service request submission process so that you can get your vehicle back on the road as soon as possible.