After a 20 minute drive at highway speeds or sometimes cold up an incline I am starting to hear a clicking noise. It seems to change sound and loudness in turns also. It sounds like a rear CV axle to me but I would not call my ear well trained.

I have read mixed reviews on replacement axles and that if you address the problem soon enough after the intermittent clicking starts you can save it.

So perhaps they are just dry? The boots look to be in fine shape. How to I inspect them for dryness, possibly replace the boots and re-oil or grease as needed?