well to my knoledge the cars wiring and all that stuff uv named has never been replaced. its all the same stuff from the factory....i think. i am the third owner so i really have no clue, the guy i bought it off of, is my dads close friend so i could ask him but where could i fond any kind of records of services? or would i have to ask the previous onwers for those? where could i take it to get the rear axil gear ratio changed? would like any radom shop do it?