[TR] Urethane bushing noise?

[TR250Driver at aol.com]

Hey Guys,
I have this annoying noise in the passenger side rear suspension of the  
TR6.  It has no pattern to it and randomly sounds like a click you would  get 
with a loose bolt?  I could get it to click by working the rear up and  down 
while the car was stationary.  So I jacked her up, nothing loose so  I 
freed the trailing arm from the shock link and took the spring out.   I could 
hear the click as I worked the arm up and down with a jack but it was  very 
difficult to tell if the noise was coming from the trailing arm bushings or  
the inner u-joint?  So I squirted some WD40 all over and let it sit  
overnite.  The noise is now gone.  
 
I know urethane bushings are notorious for being noisy.  I would have  
lubricated them when I installed them years ago.  It may be possible that  they 
have all dried out and just want to squeak and drive me nuts.  I  suppose it 
is also possible that the u-joint is bad and the wheel is getting  ready to 
fall off. It would take some further disassembly to really  check that out. 
I does not make any noise when the axle is turned.  I  can't really feel 
any play in the axle assembly.  
 
Any thoughts?
 
Thanks,
Darrell