Can't Identify Front End Problem
1999 Bonneville SLE, 137k, pure stock...New Pads/rotors, new tires recently...
Here is the problem - when traveling 55 mph or more, tracking straight I'm experiencing what I can only describe as a rapid flopping or knocking noise from, I believe, the driver side of the front end. When I turn the wheel slightly to the right the noise gets louder (I can also feel this in the gas pedal and the floor boards) - when I turn the wheel slightly to the left, the noise completely goes away until the wheel returns to center when I begin to hear and feel it again. Seems to be worse in warmer weather, and it is not noticeable at lower speeds. I have had 3 techs (including a former GM tech) analyze the front end and all of them have told me they cant find anything wrong.
This is getting really frustrating because there is something definitely wrong. Could this be a bad CV joint and/or a hub assembly? All parts and linkages, according to the techs, are tight....
Any suggestions are greatly appreciated.....Thanks in advance!!