Originally Posted by Jay238
I have had 35s for 168K miles, (174K total miles on truck) on the same wheel bearings. Also have a 6" lift kit. No wheel spacers though. Something is def. amiss. Just had my bearing checked at Toyota and they said they looked, worked, and sounded good.
I think there are two major factors for wheel bearing failure in these trucks.
A) Alignment. If you have a lot of toe in or are out of whack there will be more consistent side load on the bearing contributing to early failure.
B) Contamination. Water, mud, etc. They aren't sealed very well. Taking a nice hot hub and giving it a mudbath will draw water into it...Have you ever noticed the 2wd guys hardly have failed bearings? They don't have CV's...
I also noticed the factory bearings have very little grease on them. There is AIR space in there. It's not that the amount of grease is insufficient to lubricate the bearings, just that it's insufficient to seal
the bearings from the elements. Kind of a shitty design imo.