Rubber or Poly?
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Joined: Dec 2004
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Rubber or Poly?
Okay, so I'm ready to put everything back. I've purchased Poly everything. A-frame bushings, trans mount, differential mount, trailing arms, Superstrud, body mounts, you name it. I've recently heard / read that Poly bushings are not necessarily the best way to go. I know and understand the squeak issue and the less smooth ride/ I'm good with both of those issues. I am more interested in a better handling car. I've also purchased the upgraded fiberglass rear spring with new coils and Bilsteins at all four corners. What is the general concensus on Poly? Please advise before it's too late. Thanx, JD 
Burning Brakes
Joined: Nov 2004
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From: San Antonio Texas
i've got poly in my front end and used poly with my fiberglass spring. i love it. handling is superior for sure. once everything seated in, i rarely hear a squeek, maybe when turning into a driveway over a curb.
Safety Car
Joined: Jul 2002
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From: St. Charles IL
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I used poly everywhere. I've had zero problems, maybe I'm just lucky? Make sure you grease everything good during assembly with that special grease that comes with the poly kit.
Intermediate
Joined: Dec 2004
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From: Kingston Washington
Originally Posted by Jclgodale3
so just apply on the flat contact points? Or smear it all over the poly?
Polyurethane bushings with graphite are quieter but the swaybars take a week or so still to quiet down.
-Ed
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Safety Car
Joined: Jul 2002
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From: St. Charles IL
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A CI-6 Car Show Winner
Originally Posted by bobs77vet
i use poly everywhere except motor mounts and trans mounts...i want those vibrations isolated...
JCLGODALE3, I honestly don't know about substitutes. It was a very sticky and thick clear grease, used it anywhere there would be movement against the poly bushings. There were small tubes included with the bushings. My guess is silicone?
Team Owner
Joined: Mar 2002
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Originally Posted by JohnD77
Thanks dudes. I'm a much happier camper now. BTW, I just picked up this month's copy of Corvette Fever. They have an article regarding poly bushings. I looking forward to reading it tonight. JD 
Melting Slicks
Joined: May 2002
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From: Florida
Originally Posted by Jclgodale3
BigFish...can you eleborate on what specail grease is used? Is there a substitute? Thanks
The grease you're looking for is di-electric grease. It's used on ignition parts and it is a clear thick greasy goop.
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WC, they didn't really discuss the pros & cons of poly versus rubber, but they went with poly for project car in the article. I inferred that they believe that poly is the way to go. That's what I'm doing. My understanding about poly is that it lasts much, much longer than rubber, and eliminates body roll and suspension flex. This translates to great handling. JD 
Safety Car
Joined: Aug 2001
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From: North Easton Mass
I've heard of Silicone grease and Marine grease being used (they might be the same thing). I'm looking into poly suspension parts myself, and I think most of the suppliers either include grease with their kits or could tell you what kind of grease to use. If they can't I wouldn't buy their product!
Rick B.
Rick B.