[DeTomaso] Mechanics of after marker suspension bushings?

[Pantdino]

Stock rubber bushings are supposed to be bonded to the inner and outer sleeves.  So, yes, you do have to tighten the bolt/nut at the normal ride height or the rubber will be under constant tension and thus fail sooner.


Aftermarket bushings are usually nylon, delrin, or some other kind of harder material and are NOT bonded to the metal sleeve(s).  This is because that material will not stretch like rubber does and if there were no motion between the sleeves and bushing material between them the suspension could not move. It has been too long since I did my bushings for me to remember where that motion occurs, but I installed Zerk fittings in the outer sleeves so I could lube them when they started to squeak, so I would think at least some of it must be between the bushing material and the outer sleeve.


Jim 




-----Original Message-----
From: Tomas Gunnarsson <guson at home.se>
To: David D Fisher <fisher95020 at yahoo.com>; Ken Green <kenn_green at yahoo.com>; Pantera List Serve <detomaso at realbig.com>
Sent: Thu, Aug 16, 2012 10:44 am
Subject: Re: [DeTomaso] Mechanics of after marker suspension bushings?


I found that the rubber is not stuck to both the inside and outside tube of
the bushing. Initially they flex but if you make a 90 degree movement the
bushing stays where you set it. So tightening at ride height is not really
necessary IMO.

Tomas

-----Original Message-----
From: detomaso-bounces at realbig.com
[mailto:detomaso-bounces at realbig.com]On Behalf Of David D Fisher
Sent: den 16 augusti 2012 18:24
To: Ken Green; Pantera List Serve
Subject: Re: [DeTomaso] Mechanics of after marker suspension bushings?


Ken,
 
(For the stock bushings at least), the only suspension movement once the
A-Arm bolts are tight comes from the flex in the rubber inside the
bushing.   This is why you want to have the car on its wheels (at normal
ride height) before tightening up the bushing bolts.     The bushings are
pressed into the A-Arms and dont move, and the bolts clamp down on the inner
steel bush once you tighten them up.   Once that is done, the only thing
that can move is the rubber flexing. 
 
I would imagine that the assumption in this design is that you dont expect
to have a lot of suspension travel under normal use.
 
David
 


________________________________
 From: Ken Green <kenn_green at yahoo.com>
To: Pantera List Serve <detomaso at realbig.com>
Sent: Thursday, August 16, 2012 8:48 AM
Subject: [DeTomaso] Mechanics of after marker suspension bushings?

I took the suspension apart for powder coating and the control arms (A arms)
all have after marker bushings.  The control arms were pretty stuff and took
a fairly strong push to move up or down.  The bushings were very tight in
the control arms so I assume they moved with the arms.  I'm wondering how
all of this should work?  Should the control arms move freely with respect
to the body or be stiff like this?
 
Ken
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