A transfer case is found in vehicles that have 4-wheel drive, all wheel drive or multi-axle vehicles. It makes sure you have power available for both the front and rear axles. The transfer case fluid cools and lubricates the gears and other parts of the case.
In general it is advised to have the transfer fluid drained every 30,000 miles. This is really important in vehicles that tow or often use four-wheel drive. Over time, the additives in the fluid wear out and then it doesn’t protect as well. Also, bits of metal and clutch material wear off and get in the fluid. Because there is not a filter in the transfer case, if the dirty fluid is allowed to stay for too long, further wear on the case and your vehicle can happen.
Some indications you transfer case is in need of service would be:
- Difficulty shifting gears
- Grinding noises coming from underneath the vehicle
- Vehicle jumps in and out of four-wheel drive
With regular maintenance of your transfer case fluid, you should be able to avoid experiencing any of these issues.
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