hello. i am experiencing a knocking sound, which sounds like it is coming from underneath the front half of the truck. it doesn't knock at all when in park or neutral, even with the engine rev'd up high. it only knocks when in gear and under load. the sound is at its worst when the engine is cold and gets better as the engine warms up. once the engine is warm, a heavier load is required to get it to knock. any ideas?
Feb 22, 2010 at 3:17 PM
