In a message dated 6/8/01 2:43:50 PM, konacoffee2@hotmail.com writes:
<< I doubt that the rubber has a torque tube effect on the suspension. The
resistance of the rubber to twisting just isn't enough to really affect the
motion of the shackles. Believe the rubber is bonded to the outer sleeve
just to keep the inner sleeve centered in the bushing. The inner bush is
slightly wider than the frame so the shackles don't rub up against the frame
when they flex. With the rubber bonded to the outer sleeve, the inner bush
is held in the middle. A bushing with the rubber completely gone can allow
the spring to mover enough to cause problems, like the tire tearing up an
inner fender, BTDT. Of course that explanation doesn't cover the
Polyurethane bushings, which I understand don't have an outer sleeve.
Aloha
Peter O >>
Peter
I was going thru some old emails and noticed your note. A standard
bushing can in fact have a torque tube effect on a suspension as evidenced by
Land Rovers suggestion on installation about not tightening up the spring and
shackle bolts until you have jumped up and down on the bumper a few times or
driven the rig around the block to settle the suspension. This is because the
rubber part of a stock bushing will not stretch enough to compensate for any
binding. This also effects the ride quality because the more the suspension
has to move, the more the bushings bind. This is also why flexible
suspensions, such as parabolic springs, go thru stock bushings at a much
faster rate. This is also why I supply all of the parabolic suspensions we
sell with poly bushings. Poly bushings are unbound bushings so you don't need
to settle them on installation, they last longer in extreme conditions and
give a better ride quality.
Bill
GBR
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