Actually it would seem that the movement of the arm over the more resistant
bushing material is causing the squeak. Not the bushing moving about
freely. That would cause an increase in suspension deflection, not an
decrease like it actually does. At least that's how it seems with my TR6.
From: "Bob Hutton" <firstname.lastname@example.org>, on 2/18/1999 3:06 PM:
To: XMail@XMail@ACNS["Shane F. Ingate" <email@example.com>],
Your reply implies that the bushings move in the arm and probably this
cause squeaking. I thought they were supposed to be a tight fit and flex
within the arm, not move within it. The one piece yellow poly bushes I have
in my 2500 sedan certainly don't move within the arms and don't make any
noise at all.
[mailto:firstname.lastname@example.org]On Behalf Of Shane F. Ingate
Sent: Friday, 19 February 1999 8:50
Subject: Re: PolyU bushings for GT-6 frt suspension
> Other recommendations for poly suspension bushings?
I shelled out big bucks for the Moss "Prothane" bushings (the red
ones). These are much more compliant than the less expensive
"standard" black bushing sets that you can buy. The Prothane
bushings are quite soft, almost like rubber. Furthermore,
The lowers for the front A-arms are steel-sleeved, again, unlike
your more usual (cheap/black) poly pieces.
Regardless of material, all the synthetic bushings will squeak
and groan; cornering, bumps, putting the car on a lift. Yes, it
will be obvious when the car is running, but downshift
a couple of gears to get the brain singing again :)
You can reduce the squeaks somewhat by lubing the bearings, but in
time, the lube will ooze out and it is squeak city again. Use only
silicone lube, and lots of it!
Here's a trick for you. Tap the center of the arms where the
bushings go with a zerk. That way you can pump more lube
in when the squeaks return. It also helps to cut some longitudinal
grooves in the bushing, as this helps the lube penetrate between
the bushing and the arm. I used a Dremmel with a cutting wheel
to cut 2mm deep grooves. The grooves also allow air to escape when
you are fitting the bushings, otherwise they may be airtight and
when you push the bushings on, they'll pop off because of the compressed
air caught inside.
Shane Ingate in San Diego