The hub assemblies are a wear item, just like having the bearings greased. And whether you are in 4wd or not will have no bearing(pun) on how long they will last. Oversize tires, new wheels that are not designed for you offset, or overloading the front end when towing will affect them. Did both of mine in the.driveway on my previous GMC. About an every 100,000 mile maintenance item.
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