the two rings you refer to, does one fit inside the other? if so those are the "brakes" you are holding, and yes, the will eventually wear out and need replacement. I rebuilt both my hubs in August, if memory serves, a pair of brakes to do one side was like, $25. Might want to consider replacing a couple of the other pieces in there too, washers, and springs, those do wear also, the spring will weaken. Think those were like a dollar or two apiece. the '96MY hubs on my truck are slightly different than those on your 93, but prices shouldnt be all that different. I get all my dealer parts from Courtesy Nissan in Texas, even with shipping costs they usually can do a better price than my local dealership and the guys at Courtesy actually know what they are talking about and are very, very helpful.
Courtesy Nissan
Richardson, TX
www.courtesyparts.com
1.800.527.1909
