Nearly a couple of years ago I posted a query to this newsgroup on what
could be the source of a solid thumping (noise and physical feedback into
steering wheel) coming from the front end steering when making slow turns,
like into a parking space- usually after the car has been driven a number of
miles to get things warmed up.   One suggestion was the viscous couplers.  I
had our local mech check this out and they agreed that is was the viscous
coupler.  Repair estimates ranged from $2K to $4K depending on rebuilding
the current trans or replacing with a used one.  I didn't opt for either.
Then there was burning oil smell and I found that the right front CV boot
was ripped and spraying lube around. I had the CV boot and axle replaced for
around $180 and the thumping is now gone. Now it still may be the viscous
couplers because the weather is pretty cold now and I am not sure if that is
dampening out the thumping but after many miles and plenty of time to warm
things up the thumping is no longer there. Though I would update this forum.
Thanks for the helpful suggestions in the past. Mark