The axle bearings are sealed.

The silver/grey slime you found on the drain plug is normal.

If you do find you have bad pinion or carrier bearings, you may want to price out buying a used one vs. having it repaired. car-part.com has some good deals sometimes.


'97 4Runner, '06 F350, '86 4Runner, '05 WR450
http://home.4x4wire.com/erik