Klunking...but from /WHERE/??

[MIPS]

That I am aware of, I have now rebuilt or refurbished the entire front-end of my wagon.

-Upper ball joints
-Lower ball joints ($$$)
-Upper control arm bushings
-Lower control arm bushings
-Tie rods (inner, outer and the clamp)
-Sway bar links
-Sway bar bushings
-Steering damper
-Pitman arm
-Strut rod bushings
-Front shocks (both sides)
-Spring perch bushings ($$$)
-Springs (cleaned and repainted. Passenger side replaced with salvaged passenger spring)
-Wheel bearings (both sides)
-CV axles (both sides)
-Brake discs, pads and hardware (both sides)

You hit a bump or go down a dirt road and there's a distinct "klunk" like something travelling up/down has enough play that it to bounce. You can feel it in the floor. It's not just audible but you swear it's from the front.
The back is the same

-Wheel bearings
-Rear shocks
-Spring bushings
-Spring carriage bushings
-The springs don't look objectively sagged or broken

Engine mounts were inspected during the rebuild last year and doomed to still be good. I believe the transmission mount was replaced when that was rebuilt in 2018.

I'm at a loss. I cannot think of anything I've missed that could be causing that but it makes me nervous before considering a 4000km trip. What could it be?

[vangremlin]

I had a similar clunking in my Gremlin.  The shop diagnosed it as being the bushings were too small in the front of the leaf springs ( or the eye was too large), allowing the leaf spring to move.  They did something to squeeze the eye to make it smaller.

Not saying this is what you are experiencing but maybe take a look at it.  Good luck!!

[MIPS]

But that would be the back, no? A rear suspension failure is something on a road trip you can kinda recover from with a hunk of wood but a failure in the front would almost always mean it's tow time.
It bothers me. Even when I had the knuckles apart last month I wasn't finding play. Everything seemed to be pretty well seated.