Bmrdude did pass the time by typing:
> As I started to leave my house today in my '96GC, when shifting out of park
> into drive I noticed a pronounced "clunk", something out of the norm. Got to
> work, no problems, later started to leave for errands, noticed a "thumping"
> sound as I left the parking lot. It almost sounded like driving on a flat
> tire. Stopped, got out and looked........no flats. Continued on notice the
> thumping sound for about 30 yards then it stopped. I have since gotten under
> the GC and looked around, not noticing anything apparent that might be
> broken. Anyone have suggestions or ideas of what might be going on??????
> Maybe a "U" or "CV" joint??????

Fenderberg? are you in ice and snow country.

A clunk when going through Reverse to Drive is fairly normal.
A bad CV joints will pop when you make turns. Could be a U joint
in the drive. How is your tranny and transfer case fluid and levels?

--
DougW