Originally Posted By: kenwin30
ok, that's probably what he is talking about, are these seals known to wear out ?
Any seal will eventually wear but these are usually greased serviced with a zerk on the shaft itself.
What I have found with Toyota pickups though is that 4x4 models are usually the only ones with grease zerks as it is assumed you will use the 4x4 in inclement conditions were water is more prone to get in. The 4x2 models will usually have what is called "lubed for life" and just means whatever the life it wears out at.
Did you ever get your center support bearing looked at?