im a zetec-er, im at 100K on a 1996 and im in serious need of a new one. it grinds and hums and whines and makes every possible noise known to man, but i havent had the time to stick a centerforce in yet. but mine lasted 100K and i beat the hell out of it, 15 foot burnouts, brody's, towing my friends cars when they break down (which seems to be quite frequently since they all drive hondas and cavaliers and saturns) and just generally driving like an ass.
EDIT: oh and dont forget the split second shifting from 1st to 2nd at 25mph and 2nd to 3rd at 45mph
