Polyurethane bushings/mounts - The 1947 - Present Chevrolet & GMC Truck Message Board Network

softballnrd27 · 07-03-2011, 05:29 PM

I am replacing all my rubber suspension components, body mounts, trans, and motor mounts with polyurethane(PST) components. Is this a good or bad idea? Should i just do rubber?

mooseknuckles · 07-03-2011, 06:32 PM

very good idea.....gets rid of the sloppy, worn out, rubber crap...just grease them up good!

bluex · 07-03-2011, 10:40 PM

IMO dont do the engine and trans mounts. I put them on my old S10 and the vibration at idle was crazy. For a daily driver it was very annoying, esp with the A/C on....

lilpoindexter · 07-04-2011, 02:21 PM

I think they belong in the sway bar bushings... anywhere else, I think they are overkill. New rubber is probably better,

DetroitDan · 07-05-2011, 04:58 AM

I replaced all my cab mounts with poly on one of the trucks I built, a 78 or 79. It stiffened the truck up considerably, was so harsh I hated it and replaced it with GM rubber after 2 weeks. When I took them back out one of the radiator support mounts was split nearly in two. Rubber makes it ride like a new truck, poly makes it feel like theres no suspension under you. And I'm not particularly picky about a smooth ride. So thumbs down from me.

gchemist · 07-05-2011, 12:44 PM

Polygraphite bushings work great. I have them on my triuck. Strength of poly and softness of rubber! Use them you like them.
Posted via Mobile Device
Posted via Mobile Device

Cherub · 07-05-2011, 02:35 PM

I have the Polygraphite bushings on my upper and lower control arms and swaybar. I dont think it can hurt.

softballnrd27 · 07-05-2011, 02:52 PM

I am going to go polygraphite on the suspension and new rubber mounts on the cab, trans and motor

bluex · 07-06-2011, 02:37 AM

^^^ best idea IMO....

FYI energy suspension's black bushings are polygraphite as well. The red ones are just straight poly....
Posted via Mobile Device

07-03-2011, 05:29 PM	#1
softballnrd27 Always a work in progress Join Date: Jun 2007 Location: Harker Heights, TX Posts: 1,599	Polyurethane bushings/mounts I am replacing all my rubber suspension components, body mounts, trans, and motor mounts with polyurethane(PST) components. Is this a good or bad idea? Should i just do rubber? __________________ USMC Retired Never trust a man who can't laugh at his own fart! 2010 Silverado Crew Cab 73 SWB 5.3/4l80e Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=695168

07-03-2011, 06:32 PM	#2
mooseknuckles Registered User Join Date: Sep 2009 Location: ottawa,canada Posts: 4,550	Re: Polyurethane bushings/mounts very good idea.....gets rid of the sloppy, worn out, rubber crap...just grease them up good! __________________ my build threads '86 C10 http://67-72chevytrucks.com/vboard/s...d.php?t=415628 '67 C10 http://67-72chevytrucks.com/vboard/s...d.php?t=635078 '63 GMC http://67-72chevytrucks.com/vboard/s...d.php?t=674682

07-03-2011, 10:40 PM	#3
bluex Registered User Join Date: Jun 2004 Location: Spartanburg, SC Posts: 1,963	Re: Polyurethane bushings/mounts IMO dont do the engine and trans mounts. I put them on my old S10 and the vibration at idle was crazy. For a daily driver it was very annoying, esp with the A/C on.... __________________ Paul '78 GMC Serria 15 Heavy Half. 361/NV3500/3.73. Former LWB NV3500 swap Trailing arm swap '98 ECSB Z71 daily driver -traded '03 burb. Family cruiser http://upstategmtrucks.com/

07-04-2011, 02:21 PM	#4
lilpoindexter Registered User Join Date: Sep 2010 Location: los angeles Posts: 1,132	Re: Polyurethane bushings/mounts I think they belong in the sway bar bushings... anywhere else, I think they are overkill. New rubber is probably better,

07-05-2011, 04:58 AM	#5
DetroitDan Registered User Join Date: Dec 2009 Location: Epping, NH Posts: 605	Re: Polyurethane bushings/mounts I replaced all my cab mounts with poly on one of the trucks I built, a 78 or 79. It stiffened the truck up considerably, was so harsh I hated it and replaced it with GM rubber after 2 weeks. When I took them back out one of the radiator support mounts was split nearly in two. Rubber makes it ride like a new truck, poly makes it feel like theres no suspension under you. And I'm not particularly picky about a smooth ride. So thumbs down from me. __________________ 1982 Chevy K30 CCLB fleetside. Formerly a cab and chassis, now a fleetside dually with the rear wheels tucked underneath. 454/th400/np205/C14/D60, 6/4 inch LIFT, not drop.

07-05-2011, 12:44 PM	#6
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: Polyurethane bushings/mounts Polygraphite bushings work great. I have them on my triuck. Strength of poly and softness of rubber! Use them you like them. Posted via Mobile Device Posted via Mobile Device __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

07-05-2011, 02:35 PM	#7
Cherub Registered User Join Date: Feb 2008 Location: Houston Posts: 970	Re: Polyurethane bushings/mounts I have the Polygraphite bushings on my upper and lower control arms and swaybar. I dont think it can hurt. __________________ 2014 LTZ Z71 Silverado 82 C15 LQ4/4L80E Conversion 78 Suburban build (SOLD) 83 4x4 Suburban(SOLD) 82 C15 (my first truck)

07-05-2011, 02:52 PM	#8
softballnrd27 Always a work in progress Join Date: Jun 2007 Location: Harker Heights, TX Posts: 1,599	Re: Polyurethane bushings/mounts I am going to go polygraphite on the suspension and new rubber mounts on the cab, trans and motor __________________ USMC Retired Never trust a man who can't laugh at his own fart! 2010 Silverado Crew Cab 73 SWB 5.3/4l80e Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=695168

07-06-2011, 02:37 AM	#9
bluex Registered User Join Date: Jun 2004 Location: Spartanburg, SC Posts: 1,963	Re: Polyurethane bushings/mounts ^^^ best idea IMO.... FYI energy suspension's black bushings are polygraphite as well. The red ones are just straight poly.... Posted via Mobile Device __________________ Paul '78 GMC Serria 15 Heavy Half. 361/NV3500/3.73. Former LWB NV3500 swap Trailing arm swap '98 ECSB Z71 daily driver -traded '03 burb. Family cruiser http://upstategmtrucks.com/



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