Quote:
Originally Posted by 78w72
Vote for the poly body bushings here... have them in 3 different 2nd gen cars & never ever have any "squeaking" from them. If they are installed right with the supplied hardware & washers and bolts torqued properly there should not be any movement in those locations to cause squeaking. The subframe aligns properly too, never had an issue with that.
Have had them in my 78 WS6 for 15 years now, an 81 WS6 for 13 years & a 500+hp 72 firebird with subframe connectors that has lots of low 11sec dragstrip time & hard street miles.... no squeaking in any driving situations including inclined driveways or onto to trailers etc. Being they are considered solid bushings they do help reduce body flex somewhat & wont deteriorate & fall apart like the rubber ones. But of course real solid bushings are best but usually reserved for racing applications.
Now for moving suspension parts the poly can squeak, especially if not lubed properly with the special grease, i have them in the A-arms of my 78 that do have a minor squeak after all these years, but a quick shot of silicone spray will stop it for a couple years & even when it squeaks you cant reallly here it in the car over the engine noise, just when you bounce the car from outside.
Either body bushing will work, but in my experience & friends that use them, they dont squeak when installed & tightened right.
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Great info!! I was told the Polygraphite bushings did not squeak but the Polyurethane tend to make noise. Nice to hear from someone that has had them in place for a while.
Thx for the response!