I have a 1989 Ford Taurus GL with a 3.0L Vulcan V6 with a 4 Speed AUTO with OD. Is it possible to adjust the idle speed? It clunks when I put it into gear when its warm. It happened today, and it only does it on an incline and it helps sometimes when I push the brake as hard as i can. The emergency brake is fine, because when i push it down, the car doesnt move, even on an incline, all though it does need to be adjusted. Help.