so i come from a tmaxx 2.5 with a 3.3 so i have some knowledge but this rs4 i can't get to run right, i see no low speed needel, no gear box, do on road cars have no gear boxes? the one time i did get it running the high speed was almost out and it moved very slowly and hardly any smoke was coming out of the exhaust? i included some pictures so maby some one can identify whats what. and any one know whats a drop in replacement motor for it? thanks for any help