[QUOTE="Seth"] Thanks for the response. Please see my follow up to "High" in regards to "if" it is a wheel bearing. In regards to "inboard driveshaft cup", that's sounds ugly. Is it as ugly as it sounds? Any advice on how to narrow it down to this vs. wheel bearing?[/QUOTE] for bearings, jack the suspected wheel off the ground and, leaving the wheel on for leverage, check for play. [QUOTE] And as before (in my response to "High"), is this something a typical DIYer can/should attempt on their own? Costs of DIY vs. a shop?[/QUOTE] if it is a bearing, take it to the shop. the tools necessary to press the old bearing out and get the new one in without damaging it are not cheap or the kind of thing you have laying about in the garage. [QUOTE] Are either of these possible causes of the noise safety and/or increased wear issues (i.e. will get steadily worse to the point of non-drivable) or merely annoyances that I have to deal with till I get it tracked down and repaired?[/QUOTE] if it's the inboard joint, it can damage & loosen the output socket on the diff. driveshafts are relatively easy to replace. check out tegger's faq's regarding the joint separation tool you'll need to do this job properly. when removing the outboard joint from the steering knuckle, try and avoid hammering it - you can damage the wheel bearing.