I added a reply to your Youtube Vid.. In My opinion.. Clunk 1=  differential play.

  Spider gears on the Center diff shaft  Shaft.  They wear. and can take alot of "play" but that slack is the gears tightening up from each direction of movement. very common and almost normal until you have TOO much wear...
    While moving that wheel in the same manner make sure the axle is doing the same' motions'...  while under the car.   chunk the wheel foward and back and watch / look / feel for that same chunk activitiy in the axles  = if none it relates back into the differential.

I just refreshed a differential for a car.  The car worked and drove fine. but in Trans dissasembly i saw these spider gears whobbling around.

.  

  Two shots of the worn parts i removed..

https://photos.app.goo.gl/58zFi9RtQh2rF44c7

https://photos.app.goo.gl/CcjT26iwvgtwHTEx9

By no means am i saying yours is 100% THAT  .. but  if the bearings + CV's and alxes are all tight issue lies inboard.

  I would also work on your 'issue 2=   as that seems like a lot of wheel play.  and check the inner tie rods = pull back the boot and move the wheel in the same way -  inner tie rods are not serviceable...
  Had a car with some ' internal broken parts. with whobbly inner tie rods.


https://photos.app.goo.gl/SKweLGua6dHVy3Vx5

The track rods seem firm w/o any play, the rack is firmly affixed to the bulkhead and the steering wheel has no play.



The "clunk" only occurs during the first moment of acceleration, deceleration or when coasting when the powertrain is not under load—exactly what I would expect from a broken motor mount or engine steady. The sub-frame mounts are tight and feel firm when I poke them with a screwdriver. The "clunk" sounds exactly like the sound the transmission play produces when I rotate a wheel back and forth (see video ). Ian sez transmission play looks normal. Lower arm rose joints in place of bushings; all tight. New ball joints properly shimmed. Exhaust is fine. I'm stumped.  

Does the noise also happen if you drive over an uneven piece of road surface? If so check the L/H inner rack end bush for play.

If noise only happens on acceleration or deceleration then then I would be checking subframe mounts if it's a rubber mounted frame, play in top suspension arms, lower arm bushes and tie rods & exhaust mounts. Also check lower arm pivot pin nuts are tight.

You said the rack was tight.  Do you mean there is no play in the steering wheel, or have you gone to the rod ends and tried to push/pull them forward and back?

Drive train play looks entirely normal.....  and CVs don’t clunk ..they click,click etc etc when driven in circles...

I would be looking at the exhaust...

Cheers, Ian

I've been chasing a sound in the front end of 'Rosebud' for a couple of months now. Upon acceleration and deceleration I get a "clunk" that I can hear and feel. I've replaced the ball joints, front wheel bearings and tie-rod bushings. The steering rack is tight and there's no play in the steering wheel. The engine steadies and motor mounts are firm. I'm thinking the only other possibility is the C/V joints. There seems to me to be a ton of play in the drivetrain [video], although I'm not getting the typical clicking sound when making a hard, low speed tight turn that's normally associated with worn joints. Any ideas?

If it is the joints, should I suspect the inboard pots or the outboard joints? Thanks!