When on the ground and the truck is not moving are all 4 of you dog bones spinning, if so check for stripped hexes in the wheels. If they are not spinning check your front and rear drive shafts to see if they are spinning, from there I would look at my drive cups coming of the front and rear...
They remind me of the set I won years ago and are still buried with all my other RC stuff I will be glad when I finally get time to get my ducks in a row.
http://www.ebay.com/itm/Nova-Aluminum-Clutch-Shoes-CL-3-3-Shoe-Clutches-RC-/331389246723?pt=Radio_Control_Parts_Accessories&hash=item4d28569d03
There was a set in there of 3 as posted above again I can't tell if they are the real deal or not.
http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.XNOVA+clutch+shoes&_nkw=NOVA+clutch+shoes&_sacat=0
I can't tell if they are the genuine deal or not, I believe I still have a set of them laying around here somewhere.
So I am curious why are you looking for ceramic bearings? For the price any speed you gain is minimal if you are not a hardcore racer then the cost is not worth it in my opinion, I bash and Fast Eddies bearings are a good deal.