Do you drive an all-wheel drive, or four-wheel drive vehicle? If so, you can bet it most likely has transfer case fluid. The transfer case fluid is found within the transfer fluid case. This case can sometimes be called a transfer box or a transfer case. The transfer fluid case is what holds the transmission system together.

Both the rear and front axles connect to this case through a mechanical shaft or the drive shaft. This shaft is then able to give out torque and make rotation start to happen. Within this all-important case the power is being distributed to both axles so that all the wheels are getting the same amount of torque, at the same time.

The transfer case fluid lubricates the various parts in the transfer case, and helps to cool it down. It comes in two forms which are traditional gear oil, or synthetic oil.

Thanks to everyday wear and tear, the fluid starts to become dirty over time, and even contain debris. The dirty fluid will end up taking its toll on your car in a negative way. You may hear sounds coming from the gears, which sound like whining, and as you turn the car it may shudder.

When you determine that it's time to change your transfer case fluid, keep a few things in mind:

  • Have your fluid inspected: If you’re unsure of whether or not you need to replace your fluid, make an appointment to have your current fluid inspected. At the same time, you don’t want to let this fluid get low, so regular replacement is key.

  • Check your owners manual: There is traditional gear oil and synthetic oil, you want to be sure you’re purchasing the correct kind for your vehicle. Check your owner's’ manual for more information.

  • Choose a brand: You’ll find there are a number of brands available at different price ranges. All should be relatively inexpensive though.

YourMechanic supplies top-quality transfer case fluid to our certified mobile technicians. We can also replace transfer case fluid with the fluid that you've purchased. Click here to get a quote and more information on transfer case fluid replacement.

This article originally appeared on YourMechanic.com as How to Buy Good Quality Transfer Case Fluid and was authored by Valerie Johnston.


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