Classic CV joint.knock. Time to change.

John
On 9/1/2011 8:51 PM, Kevin Gilbert wrote:
I've finally been able to produce the sound. Last night I drove a
series of hard left/right/left/right turns, kind of like when trying
to avoid your neighbor's cat. On each hard pull to the left, I heard a
"thwunk" from the right rear."

Unless he is not describing the symptom correctly, I've never heard a bad CV that made a single "thwunk" noise while loading it. My personal
experience is that they always make a consistent clunking as the wheel/axle rotates. I HAVE had a broken spring on a van that whenever it
was loaded, would shift, making a thunk noise, and apparently return to its resting position when I straightened out, then repeat the noise
when turning, each time a single thunk, clunk, "thwunk", whatever you want to call it.
I guess I'd also want to check to see that the lug nuts are secure.
Have you checked to see if your engine mounts are healthy, showing no cracks?
Bob