[V6-12v] Squeakiness

[T. Jackson]

Ever since I've owned my '95 90Q (about 5 years now) I've experienced a
squeak from the rear suspension area.  When the problem first began to
occur, it would only happen when the outside temperature was hovering around
0-5 Celsius.  At first I believed the problem to be squeaky springs and
shocks but I've since replaced them with Koni Adjustables and H&R Springs
which offered no improvement.  

 

Lately the problem has gotten worse.  Now the squeaking is heard constantly
at any temperature and it's quite noticeable, even from 50 feet away!  Today
I had my car in the shop for a full timing belt service and I had mentioned
the problem to my mechanic.  He offered to spray the rear ligaments with
some penetrating oil.  Today I picked up the car and was pleasantly
surprised to find the squeak was gone.  Well, I just went out after having
the car parked for a couple of hours and low and behold the squeak is back
again at the EXACT same intensity!  Before I go insane, could someone please
recommend what can be done as a long term fix?  I did pick up a can of White
Lithium Grease a couple of days ago with the thought of giving it to my
mechanic but decided not to after he said he had his own penetrating oil,
though I'm not sure of the brand.  Is the Lithium Grease ok to use on the
suspension bits?  What could/should I replace so I can maintain my sanity?


Thanks in advance!