- New transfer case fluid (Dexron III or Dextron VI, whichever your vehicle requires)
- 10mm Allen wrench
- Funnel
- Jack and jack stands
- Wheel chocks
- Safety glasses
- Drip pan
Procedure:
1. Park your vehicle on a level surface, engage the parking brake, and chock the wheels. It is important to raise the vehicle to access the transfer case drain plug more conveniently. Lift it with a jack, then secure it on jack stands.
2. Locate the transfer case drain plug. The transfer case is usually located on the passenger side of the transmission. The drain plug is typically a 10mm Allen head bolt. To locate the drain plug, check your vehicle's owner's manual.
3. Place a drip pan under the drain plug. This will catch the old transfer case fluid.
4. Loosen and remove the drain plug. Once you have located the drain plug, loosen and remove it with a 10mm Allen wrench. Place the drain plug on a rag or paper towel to prevent it from getting lost.
5. Allow the old transfer case fluid to drain completely. This can take a few minutes depending on your vehicle's size and fluid capacity.
6. Reinstall the drain plug and tighten it securely. Once all the old fluid has drained, reinstall the drain plug and tighten it securely with the Allen wrench.
7. Add the recommended amount of new transfer case fluid. Locate the transfer case fluid fill plug. It is typically a 17mm bolt located on the top of the transfer case. Remove the fill plug and add the recommended amount of new transfer case fluid using a funnel. The recommended amount of fluid will be specified in your vehicle's owner's manual. This process might require more than a single quart of Dextron fluid if you have drained most or all of the fluid.
8. Check the transfer case fluid level and add more fluid if necessary. Once you have added the recommended amount of fluid, start the vehicle and let it run for a few minutes. Then, turn off the engine and check the transfer case fluid level again. If the fluid level is low, add more fluid until it reaches the recommended level. Reinstall the fill plug and tighten it securely.
9. Lower the vehicle and dispose of the old transfer case fluid. You can dispose of the used fluid at a local recycling center or auto parts store. Replace any safety equipment and return your tools.
Tips:
- Transfer case fluid change interval varies depending on the vehicle and usage. Check your owner’s manual for the recommended change interval.
- Some transfer cases may have both a drain and a fill plug. If this is the case, be sure to drain and fill the transfer case through the correct plugs.
- It's a good idea to change the transfer case fluid when servicing the transmission, as the fluids are often shared between the two components.
