Don't have an answer, but I was thinking about running the same test. That said, I haven't done anything on my van since about November, because I just haven't felt like crawling around in my garage.I also ran a test to see if it was really the sway bar that was causing the problem after the rattle came back. I unbolted the bar end of the link on the driver side and wired it up out of the way so then there were no significant forces acting on the bar. i drove it around for a few days and sure enough never made a sound. Put it back on and there was again.
The bushings are supposed to grip the bar but, being poorly designed, they can't maintain the grip. There's the articulation of the links coming into play also, since they are connected to a rotating strut, versus the frame.We have both been fighting this for a year now. My last "fix" has lasted 6 months. I put new bushings in and liberally swabbed them inside and out and the swar bar too with a good heavy duty silicone grease. Put it together and it still made noise. But stay with me here. I noticed if I rocked the car it would clunk. I had the wife rock it while I got underneath and plainly saw that the strut links were not tight and moving in their hole. Tightened them up and have not had further problems. Note that I am convinced this was both the silicon grease and the loose links as I have done it with new non-greased bushings and properly tightened links and it still clunked.
In short, make sure the links are VERY tight and try gooping up the bushing with grease. Ya ya, I know, the bushings in theory are supposed to grip but I've tried that for months and a half dozen tries and replacement parts and this is the only time it's worked.
I believe the sway bar bushings for the 5th Generation may have this plus they have a proper 2 bolt bracket.Sway Bar Bushings with Synthetic Fabric Liner
MOOG Problem Solver sway bar bushings feature an innovative synthetic fabric lining paired with a high-quality natural rubber material for quiet operation. Less prone to splitting, discoloring or cracking, these bushings eliminate the need for lubrication and maintenance.
Maybe a nut has backed off on a sway bar link. It happens, fairly often, makes an awful racket.Ok, so I've taken the bushings apart and lubed with fluid film and there is absolutely no change in the noise. Still clunking away over bumps and on take off (kind of makes me wonder if that's a motor mount) and the chirping/squeaking noise is been making is just as pronounced.
Accidentally left that out, but don't think so there, sadly. I checked the torque on the end links and it's what it should be. I'll check again next I have the wheels off, as I may as well just to be certain.Maybe a nut has backed off on a sway bar link. It happens, fairly often, makes an awful racket.
Rear motor mount is bad about degrading to the point of the center bolt/sleeve making direct contact with the aluminum mount body. On my 2005 3.8L, my rear mount was metal on metal by about 225,000 miles... at which time I replaced all four mounts.(kind of makes me wonder if that's a motor mount)