hey,
just wondering how i can tell if the gearbox i bought is in good nick, and if it will do the job. heard that pulling it apart, and opening it up is not the best idea, as everything inside goes out of place.
what can i do before i put the box in to see its ok. because the whole k frame and motor has to be dropped again if the box is no good. its rb30e (rb20det) one going onto an rb25det.