I have a Shockwave that I have only played with a couple of times and the wheels wobble. The rear right so much so it rubs the arm and upper link thing. I took it all apart and believe the brass bushings have worn out. Is this considered normal wear? I'm almost sure it's the bushings. I'm going to try a local fastener shop to see if I can match them, I hate to think I have to order them that often. Is there some type of automotive grease that would prolong life? Are there bearings available?

Throw those bushings away and get bearings, after that get new tires and wheels want a little insurance get the aluminum hubs (ONLY)

The larger inner wheel bushing is a 10x15x4 (mm) and the smaller outer one is 5x10x4. I'm pretty sure the Jato uses 10x15 as well, so if your local hobby shop stocks Traxxas then you shouldn't have trouble finding replacements (though it would pay to double check my measurements).