1989 bronco ii. I hear a clanking from the front end while the motor is in idle and accelerating. The sound will increase in speed as I accelerate. Almost sounds like metal spinning within metal. The front u-joints are fine. It cant be the axle if Im not moving.When i accerlate Ill hear a combo clanking and clacking. i think the clanking is aleak from exhaust maifold gaskets.