can\'t stop the clunk.... have a 90' blazer that clunks when put into gear or when shifting between gears (automatic). Figured it was probably the U-joints so replaced them today. problem is.. it still clunks.. Seems a lot better when accelerating etc.. but still clunks when put into drive or when coasting and it downshifts. When you put it into drive it clunks and lurches like it has a high idle but idle is right where it should be (does it regardless of engine being warm or cold). What else would cause this?