Toyota Pick-ups/Land Cruiser/4Runner 1989-1996

Transfer Case

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FLUID RECOMMENDATIONS





Trucks and 4Runner's w/MT-multipurpose gear oil API GL-3, GL-4 or GL-5; SAE 75W-90 or 80W-90
 
Trucks and 4Runner's w/AT-ATF DEXRON®II or its superceding fluid type
 
Land Cruiser-multipurpose gear oil API GL-4 or GL-5; SAE 90W.
 

LEVEL CHECK



See Figures 1, 2 and 3

The oil in the transfer case should be checked at least every 7500 miles (12,000 km) and replaced every 25,000-30,000 miles (40,000-48,000 km), even more frequently if driven in deep water.

  1. With the truck parked on a level surface, remove the filler plug from the side of the transfer housing.
  2.  



Click image to see an enlarged view

Fig. Fig. 1: When removing the filler plug, remember there is a gasket, usually metal

  1. If the lubricant begins to trickle out of the hole, there is enough. Otherwise, carefully insert your finger (watch out for sharp threads) and check to see if the oil is up to the edge of the hole.
  2.  



Click image to see an enlarged view

Fig. Fig. 2: Watch the threads in the filler plug, they can be sharp

  1. If not, add oil through the hole until the level is at the edge of the hole. Most gear lubricants come in a plastic squeeze bottle with a nozzle; making additions simple. You can also use a common everyday kitchen faster.
  2.  



Click image to see an enlarged view

Fig. Fig. 3: The gear oil is usually in a long container with a built-in spout

  1. Install the filler plug and gasket, then run the engine and check for leaks.
  2.  

DRAIN AND REFILL



See Figures 4 and 5

  1. The transfer case oil should be hot before it is drained. If the engine is at normal operating temperature, the oil should be hot enough.
  2.  
  3. Raise the truck and support it properly on jackstands so that you can safely work underneath.
  4.  
  5. The drain plug is usually located on the bottom of the transfer case. Place a pan under the drain plug and remove it.
  6.  



Click image to see an enlarged view

Fig. Fig. 4: This truck has a bracket/shield where you access the plug through. You may need an extension


CAUTION
The oil will be HOT. Be careful when you remove the plug so that you don't take a bath in hot gear oil.

  1. Allow the oil to drain completely. Clean off the plug and install it, tightening it until it is just snug.
  2.  



Click image to see an enlarged view

Fig. Fig. 5: There will be just enough room to remove the plug with your hands. Be careful of the hot oil

  1. Remove the filler plug from the side of the case.
  2.  
  3. Fill the transfer case with the correct oil through the filler plug hole as detailed previously. Refer to the "Capacities'' chart for the amount of oil needed to refill your transfer case.
  4.  
  5. The oil level should come right up to the edge of the hole. You can stick your finger in to verify this.
  6.  
  7. Install the filler plug with a new gasket, lower the truck, and check for leaks. Dispose of the old oil in the proper manner.
  8.  

 
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