To disengage auto hubs put her in 2wd and back up at least ten feet.
Then drive forward and see if you still have the clicking.
One of my problems as a mechanic is that I don't have a lot of experience, and can't tell the difference between an acceptably worn part, and one that necessarily needs to be replaced, unless it is REAL worn, or obviously broken.
A lot of people prefer manual hubs to auto hubs, and will make that recommendation regardless of whether there is an issue or not. Will it fix your problem? That's a definite .. who knows?
__________________
BroncoJoe19
2006 Alt Fuel Jeep (electric)
'98 windstar 3.8L
'99 Crown Vic 4.6L
'90 Full Size Bronco 5.0L
I'm not a professional mechanic, take my suggestions with a grain of salt, or a cup of coffee 
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