Classic Mustangs List Archive

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Mail From: kevin (email redacted)

Howdy all

I was at the local Mustang shop to pick up some rollers for my rear quarter
window. Got to talking to the guy, and he tried to scare me into replacing
the poly bushings on my strut rods with rubber. He claims they don't have
enough give, and the strut rods snap! Says they all do it, and that he has
seen half dozen or more cars totaled because if it.

Anyone heard of this? I think he is a purist, and is pissed I did not buy
local from him for my suspension parts. At the same time, I thought I would
see if anyone else has heard of this.

Kevin
'67 Coupe, 289

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Mail From: (email redacted) (email redacted)

Broke two strut rods on my '70 mach because of the poly

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Mail From: Chris Stephens (email redacted)

I have heard of it, but I have been useing polly on my 70 for about 18
months now. I did replace the strut rods with new though.


> Howdy all
>
> I was at the local Mustang shop to pick up some rollers for my rear
quarter
> window. Got to talking to the guy, and he tried to scare me into
replacing
> the poly bushings on my strut rods with rubber. He claims they don't have
> enough give, and the strut rods snap! Says they all do it, and that he
has
> seen half dozen or more cars totaled because if it.
>
> Anyone heard of this? I think he is a purist, and is pissed I did not buy
> local from him for my suspension parts. At the same time, I thought I
would
> see if anyone else has heard of this.
>
> Kevin
> '67 Coupe, 289
>
>
> _______________________________________________
> Classic-mustangs mailing list
> (email redacted)
> mix.twistedpair.ca/mailman/listinfo/classic-mustangs

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Mail From: Patrick Stott (email redacted)

Hi all,

I've recently heard of this too. I've been using these poly bushings at the
struts on my '69 for about 4 years with no problems but if this is an issue I
will change back to rubber ones.

The poly does not flex much at all but I don't know how much the flex of the
rubber could help out. If the problem is that bad with poly they might even
snap under extreme conditions (even with the rubber) I assume they snap during
braking? BTW roads down here are quite bad and I haven't had any problems, but
as I said, if it does happen I'm back to the rubber ones to be safer.

Patrick Stott
'69 Mustang
Caracas, Venezuela




I was at the local Mustang shop to pick up some rollers for my rear quarter
window. Got to talking to the guy, and he tried to scare me into replacing
the poly bushings on my strut rods with rubber. He claims they don't have
enough give, and the strut rods snap! Says they all do it, and that he has
seen half dozen or more cars totaled because if it.

Anyone heard of this? I think he is a purist, and is pissed I did not buy
local from him for my suspension parts. At the same time, I thought I would
see if anyone else has heard of this.

Kevin
'67 Coupe, 289


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Mail From: Chris Kelly (email redacted)

We've run them on the Falcon since 1994 without problems.
========The Kelly's==============
Chris - (email redacted)
Debbie - (email redacted)
users.abilene.com/~dkelly
Merkel, Texas
67 Falcon, 67 Mustang
=================================

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Mail From: Bryan Fuller (email redacted)

I've seen them break on two cars now. I think you would probably be OK
if you put new strut rods on at the same time, but from my experience
I would not use them with old rods.

---
Bryan Fuller
themustangshop.com - wabba.net
1968 "GT-351" Mustang - 1970 Mach 1 - 1970 Boss 302
1999 Cobra Convert - 2000 F-350 PSD DRW CC 6spd

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Mail From: Peter Thompson (email redacted)

Heard the same thing, also about a Mustang club member/president who was
killed due to a strut rod breaking.
Got an updated/new one from Total Control for the Mustang, no problems with
that and poly bushings. Driven hard and our roads in the PNW are not in
great shape.
Now I need to do the Falcon.
Peter
69 Mustang Convertible 377w
64 Falcon Convertible 302
98 Jaguar XJR 4LSC
Everett, WA


-----Original Message-----
From: kevin [mailtoemail redacted)]
<snip> Got to talking to the guy, and he tried to scare me into replacing
the poly bushings on my strut rods with rubber. He claims they don't have
enough give, and the strut rods snap! Says they all do it, and that he has
seen half dozen or more cars totaled because if it.

Anyone heard of this? I think he is a purist, and is pissed I did not buy
local from him for my suspension parts. At the same time, I thought I would
see if anyone else has heard of this.
</snip>

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Mail From: (email redacted) (email redacted)

have had polygraphites on new rods for 18 moths, no problems so far.

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Mail From: R & P (email redacted)

Have had the Polys' on my stang for almost a year...With no probs
either...Hope they love me!


Ron
72 stang Convertible

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Mail From: (email redacted) (email redacted)

As I said before I had both strut rods break on my '70 mach. Yes, both of
them were the originals. I live in the great state of Pa. and I believe we
have had the distinction of being voted in the top 5 worst roads several
times ... if not always. The first time I encountered the problem ..or should
I say that my wife did, she was breaking going down hill to the left and the
left strut rod broke .. Fortunately she was moving slow. The second time I
was driving home from dinner in Cape May N.J. I crossed a street that had a
very high crown and when the suspension bottomed out I heard a clank...I
looked at my wife and told her that the other strut rod had broken. When I
tried to stop it was all I could do to keep the steering wheel from being
ripped out of my hands. When this happens the tire moves back into the fender
and you hear a scrunching noise. At the time the one strut rod wasn't
available so I had to get one from a salvage yard. I changed to rubber and
never had any more problems. I would caution anyone using poly to make sure
that they are not tightened too much as this will keep the rod from flexing
as it should. I would also caution everyone that if a strut rod breaks at
high speed or in any hard cornering or breaking it would be a life
threatening problem!

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Mail From: WRIGHT, Matt (email redacted)

Hi Guys,

I guess I have to question the motivation for polyurethane in this
application. The foward strut rod mounting point on the unibody is a
suspension pivot point. The stock rubber bushings have the needed
compliance to allow the suspension to cycle relatively easily. Aftermarket
strut rods use heim joints to maintain this articulation AND a fair amount
more rigidity.

To me, using polyurethane here does nothing more that artificially increase
the spring rate up front (due to the binding) and transmit these binding
loads through the rest of the components. The weak link being the strut
rod. Anybody notice increased understeer after installing poly ? IMHO,
polyurethane certainly has it's place but not here. Less compliance is good
BUT not at the expense of articulation.

Thanks,
Matt Wright '65
K-Model FB


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Mail From: Paul Prince (email redacted)

Have had poly strut rod bushings for 9 years with no problems.

Paul Prince
1965 Mustang 2+2
1989 Mustang GT Convertible