Changing the rear differential fluid in your 2008 Toyota Tundra is a crucial maintenance task, especially if you frequently tow. While engine and transmission oil changes are common, the differential often gets overlooked. This guide provides a step-by-step walkthrough of changing the rear differential fluid in a 2008 Toyota Tundra with 145,000 miles, offering valuable insights and tips for a successful DIY project.
Necessary Tools and Materials for Your 2008 Toyota Tundra
This job is straightforward and doesn’t require specialized tools. Gather the following:
- Differential Fluid: Royal Purple Max Gear 75W90 Synthetic is a good choice. The 2008 Toyota Tundra’s rear differential capacity is 3.75 quarts, so four quarts will suffice.
- Crush Washers: These are essential for a proper seal. The part number for a 2008 Toyota Tundra is 12157-10010.
- Torque Wrench: For accurate tightening of the drain and fill plugs.
- 23mm or 15/16 inch Socket: To fit the drain and fill plugs.
- Disposable Gloves: To keep your hands clean.
- Oil Drain Pan: To catch the old fluid.
- Funnel: To help pour the new fluid.
- Drip Pan: For added protection against spills.
Accessing the Rear Differential on a 2008 Toyota Tundra
The rear differential on a 2008 Toyota Tundra is easily accessible. You won’t need to jack up the truck. The drain and fill plugs are located on the back and bottom of the differential. Clear any obstructions, like a spare tire. Using a drip pan under the oil drain pan provides extra protection against spills. Differential fluid has a strong odor, so gloves are recommended.
Locating and Removing the Drain Plugs
The 2008 Toyota Tundra’s differential has the fill and drain plugs on the back. Remove the fill plug first, then the drain plug. Let the old fluid drain completely, which may take about 5 minutes. The fluid might be clear or slightly cloudy, as differential fluid degrades by thinning, not accumulating contaminants like engine oil.
Drain plugs on the rear differential.
Cleaning and Reinstalling the Drain Plug
The drain plug has a magnet that attracts metal particles. Clean this magnet thoroughly before reinstalling the plug. Remember to replace the crush washers on both the fill and drain plugs. Torque the drain plug to 36 foot-pounds.
Filling the Differential: Achieving the Correct Level
The fill hole also serves as a level indicator. Overfill the differential until fluid starts to drain out of the fill hole. You can use a pump, a cut oil bottle, or a funnel with a valve. The 2008 Toyota Tundra requires 3.75 quarts. Filling four quarts and letting the excess drain ensures the correct level.
Final Steps and Leak Check
Once the fluid level is correct, install the fill plug and torque it to 36 foot-pounds. Clean the area and take your truck for a short drive to warm up the differential fluid. Inspect for leaks around both plugs. Dispose of the old fluid properly by taking it to a recycling center.
