I wonder if guys who lifted VX and did not installed diff drop brackets having problem with the knuckle thrust washer. Mine wear out every 10 000 - 15 000 miles. Is it normal for the lifted VX or I have specific problem to me ot everyone else just not noticing that?

I actually plan to drop the diff but if it's something specific to me I need to dig further to find the cause (may be replace or polish drive shaft and knuckle, etc.).