Got this WC rebuild kit today from Transparts Wharehouse, up in Redding, CA.
Despite the slathering of USA, the bearings are Japanese Koyo bearings, and one of the reasons I bought this kit.
I suspect other people get this same kit, it does have Tremec synchros, the newer style with carbon fiber lining, opposed to the older style that looks like auto trans liner. This would only matter on a WC T5, as the NWC uses brass synchros. WC T5 uses a brass synchro on 5th/Reverse.
