1. Preparation:
* Safety First: Jack up the van securely using jack stands. Never work under a vehicle supported only by a jack. Use wheel chocks on the front wheels as an added safety precaution.
* Gather Supplies: You'll need the correct type and amount of rear axle fluid (consult your owner's manual), a drain pan, a wrench (likely a 10mm or 3/8" drive socket for the fill plug and drain plug, but check your manual), a funnel, and gloves.
* Locate the Fill and Drain Plugs: These are usually located on the differential housing (the pumpkin-shaped part of the rear axle). The fill plug is usually higher than the drain plug. The fill plug may have a square or other shaped head instead of a standard hex.
2. Draining the Old Fluid:
* Locate the Drain Plug: Position your drain pan underneath the drain plug.
* Remove the Drain Plug: Carefully loosen and remove the drain plug with your wrench. Let the old fluid drain completely. This may take some time.
* Inspect the Old Fluid: Check the fluid's color and consistency. Metallic particles or a very dark, almost black color indicates wear and potential problems.
3. Refilling with New Fluid:
* Locate the Fill Plug: Find the fill plug (usually higher on the differential housing).
* Remove the Fill Plug: Carefully loosen and remove the fill plug.
* Add New Fluid: Using a funnel, slowly pour in the correct type and amount of rear axle fluid as specified in your owner's manual.
* Check the Fluid Level: The fill plug is typically used to check the fluid level. Once you reach the bottom of the fill hole you should stop adding fluid. Many manuals recommend slightly overfilling and allowing the fluid to reach the bottom of the fill hole.
* Reinstall the Fill Plug: Tighten the fill plug to the manufacturer's specified torque (check your owner's manual). Over-tightening can damage the threads.
4. Reinstallation and Cleanup:
* Reinstall the Drain Plug: Tighten the drain plug to the manufacturer's specified torque.
* Lower the Van: Carefully lower the van using the jack stands.
* Clean Up: Dispose of the used fluid properly according to local regulations.
Crucial Points:
* Fluid Type: Use the correct type of gear oil recommended in your owner's manual. This will usually specify the viscosity (e.g., 75W-90, 75W-140) and possibly an API classification. Using the wrong fluid can damage your axle.
* Owner's Manual: This is your best source of information for your specific vehicle. The location of plugs, the correct fluid type and amount, and the torque specifications are critical details found only in your manual.
If you're not comfortable performing this task yourself, it's best to take your vehicle to a qualified mechanic. Incorrectly performing this procedure can cause significant damage to your rear axle.
