Bushings Cab, Core, Poly or Rubber? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

solidaxel · 01-15-2014, 09:20 AM

I am getting ready to replace the bushings on the cab and core support , what is the preferred choice of material for my 78, and where do I order them from?

**rs74** · 01-15-2014, 10:02 AM

And the debate begins. I bought the rubber kit from LMC for my short bed. I have never run poly bushings but didn't want to chance them riding too rough or the possibility of squeaking. JMO. There are alot of guys who run poly and like them. It just didn't set well with me.

solidaxel · 01-15-2014, 10:15 AM

Thanks for the confirmation about rubber.
I think rubber also, but I am open for suggestions.
Poly on suspension parts, but maybe rubber on the cab.

tgh117 · 01-15-2014, 10:18 AM

I am in agreement.

Rubber for body mounts for same reasons.

I even wanted to stay rubber with my springs and stuff when I replaced them because the poly stuff I was taking out was so brittle and cracking, I didn't want to be bothered, but I ended up putting mostly poly stuff in those places. I kept rubber for cab, and core, motor, and trans.

Good luck.

**rs74** · 01-15-2014, 10:26 AM

I ended up buying MOOG bushings for my control arms and leaf springs/hangers.

andrewmp6 · 01-15-2014, 11:00 AM

If you want a smoother ride go rubber,ploy is stiffer and might squeak with enough body flex.

85chevy86 · 01-15-2014, 11:20 AM

I used poly bushings for the cab. Have had them on for 3-4 years now with no squeak that I can hear.

**old Rusty C10** · 01-15-2014, 11:42 AM

on mine id use rubber the polys are not as quiet

doubleclucker · 01-15-2014, 11:49 AM

I bought (energy suspension)polyurethane body mounts back in the early 90's when they first came out for my truck; after cab changes,rad support changes over the years they still look the same today as when I put them in;Squeeks were never an issue always installed with anti-seize compound on all steel parts. Ended up buying them for everything that was rubber on truck never had to replace any of them again.
Just my 2 cents.

Fatherof3 · 01-15-2014, 12:54 PM

Unless you need to use your cab as a frame stiffener go rubber. One of my favorite things about old Chevy trucks is how good they ride.
Think Autocross vs road trip, which is your flavor?

mooseknuckles · 01-15-2014, 03:07 PM

poly every where.....if you're worried about the ride, you need a newer truck!

Pro Performance · 01-15-2014, 03:37 PM

The poly is what I suggest, and when installed with the supplied lubricant, they will be quiet. We sell Prothane and their black color mounts have a hint of graphite in them, which also helps against squeaking. I have yet to have a customer come back and say they are noisy.

We stock the black mounts, and are local here in AZ. Let me know if you need a set. You also will have a forum discount on Prothane with us.

http://www.azproperformance.com/Prot...ab-Mounts.html

- Travis

solidaxel · 01-15-2014, 06:01 PM

Send me a pair of core support bushings, black.
I will call you with a card number.

Pro Performance · 01-15-2014, 06:32 PM

Sounds good. I think I may have missed your call, but am available now. Just give me a ring when you get a chance.

79Betty · 01-15-2014, 08:13 PM

I have rex poly under my body. It rode so rough before with bad rubbers i haven't noticed a difference. With poly you don't have to worry about them later on in life which is nice

**aotte1** · 01-16-2014, 06:08 PM

I like rubber, poly did not work for me under load, the bushings were plastic and flowed. This was several years ago, maybe they are better now. I use rubber or aluminum only now. For highly stressed core support I only use rubber to help protect the radiator from stress/cracks.
Les

dieseldawg142 · 01-16-2014, 10:44 PM

ifin you want to never deal with them again, go poly. i got it all over my crew, leafs swaybar, body, etc. poly made my susp. waaay better, & i dont know what people are saying about squeaks & lousy ride, when i installed them, i greased them liberally with lithium, have never heard a sound out of them.
ride? exactly the same, (mind you, you dont have any ride with swampers anyways!), in fact the truck feels more "screwed down" then with rubber.
and yeah, i installed the supossedly noisier red bushings, hey you haft to color coordinate

cory d · 01-17-2014, 01:55 AM

i have all poly up front, feels better than rubber. its not "harsh" or "stiff" way less floppy than rubber and they move freely. anyone else have a manual trans? my Z-bar and all clutch linkage is well greased but when i depress the clutch, it lifts the cab up. my bushings are in good shape and not loose. i plan on switching to poly bushings on those too. everything but the leaf eyes. those need rubber

01-15-2014, 09:20 AM	#1
solidaxel Registered User Join Date: Dec 2002 Location: Cactus Patch So. Az Posts: 4,749	Bushings Cab, Core, Poly or Rubber? I am getting ready to replace the bushings on the cab and core support , what is the preferred choice of material for my 78, and where do I order them from? __________________ 53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42

01-15-2014, 10:02 AM	#2
rs74 Senior Member Join Date: Jun 2010 Location: Illinois Posts: 2,957	Re: Bushings Cab, Core, Poly or Rubber? And the debate begins. I bought the rubber kit from LMC for my short bed. I have never run poly bushings but didn't want to chance them riding too rough or the possibility of squeaking. JMO. There are alot of guys who run poly and like them. It just didn't set well with me. __________________ Roy 85 Short Bed Silverado- Work in progress. http://67-72chevytrucks.com/vboard/s...d.php?t=564818 1987 R10 shortie

01-15-2014, 10:15 AM	#3
solidaxel Registered User Join Date: Dec 2002 Location: Cactus Patch So. Az Posts: 4,749	Re: Bushings Cab, Core, Poly or Rubber? Thanks for the confirmation about rubber. I think rubber also, but I am open for suggestions. Poly on suspension parts, but maybe rubber on the cab. __________________ 53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42

01-15-2014, 10:18 AM	#4
tgh117 Crazy Join Date: Apr 2005 Location: Emmaus, Pa Posts: 203	Re: Bushings Cab, Core, Poly or Rubber? I am in agreement. Rubber for body mounts for same reasons. I even wanted to stay rubber with my springs and stuff when I replaced them because the poly stuff I was taking out was so brittle and cracking, I didn't want to be bothered, but I ended up putting mostly poly stuff in those places. I kept rubber for cab, and core, motor, and trans. Good luck. __________________ 77 SB Stepside in a bunch of pieces scattered around the garage.

01-15-2014, 10:26 AM	#5
rs74 Senior Member Join Date: Jun 2010 Location: Illinois Posts: 2,957	Re: Bushings Cab, Core, Poly or Rubber? I ended up buying MOOG bushings for my control arms and leaf springs/hangers. __________________ Roy 85 Short Bed Silverado- Work in progress. http://67-72chevytrucks.com/vboard/s...d.php?t=564818 1987 R10 shortie

01-15-2014, 11:00 AM	#6
andrewmp6 Registered User Join Date: Jan 2009 Location: Louisville,Ky Posts: 5,811	Re: Bushings Cab, Core, Poly or Rubber? If you want a smoother ride go rubber,ploy is stiffer and might squeak with enough body flex.

01-15-2014, 11:20 AM	#7
85chevy86 Registered User Join Date: May 2012 Location: mt solon va Posts: 117	Re: Bushings Cab, Core, Poly or Rubber? I used poly bushings for the cab. Have had them on for 3-4 years now with no squeak that I can hear.

01-15-2014, 11:42 AM	#8
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,312	Re: Bushings Cab, Core, Poly or Rubber? on mine id use rubber the polys are not as quiet __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

01-15-2014, 11:49 AM	#9
doubleclucker Registered User Join Date: Jan 2014 Location: ONTARIO CANADA Posts: 130	Re: Bushings Cab, Core, Poly or Rubber? I bought (energy suspension)polyurethane body mounts back in the early 90's when they first came out for my truck; after cab changes,rad support changes over the years they still look the same today as when I put them in;Squeeks were never an issue always installed with anti-seize compound on all steel parts. Ended up buying them for everything that was rubber on truck never had to replace any of them again. Just my 2 cents.

01-15-2014, 12:54 PM	#10
Fatherof3 Registered User Join Date: Nov 2013 Location: North Bend Wa Posts: 355	Re: Bushings Cab, Core, Poly or Rubber? Unless you need to use your cab as a frame stiffener go rubber. One of my favorite things about old Chevy trucks is how good they ride. Think Autocross vs road trip, which is your flavor? __________________ 65 C20 292 4spd 4:56 Eaton HO52

01-15-2014, 03:07 PM	#11
mooseknuckles Registered User Join Date: Sep 2009 Location: ottawa,canada Posts: 4,550	Re: Bushings Cab, Core, Poly or Rubber? poly every where.....if you're worried about the ride, you need a newer truck! __________________ 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

01-15-2014, 03:37 PM	#12
Pro Performance Registered User Join Date: Aug 2010 Location: AZ Posts: 3,069	Re: Bushings Cab, Core, Poly or Rubber? The poly is what I suggest, and when installed with the supplied lubricant, they will be quiet. We sell Prothane and their black color mounts have a hint of graphite in them, which also helps against squeaking. I have yet to have a customer come back and say they are noisy. We stock the black mounts, and are local here in AZ. Let me know if you need a set. You also will have a forum discount on Prothane with us. http://www.azproperformance.com/Prot...ab-Mounts.html - Travis

01-15-2014, 06:01 PM	#13
solidaxel Registered User Join Date: Dec 2002 Location: Cactus Patch So. Az Posts: 4,749	Re: Bushings Cab, Core, Poly or Rubber? Send me a pair of core support bushings, black. I will call you with a card number. __________________ 53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42

01-15-2014, 06:32 PM	#14
Pro Performance Registered User Join Date: Aug 2010 Location: AZ Posts: 3,069	Re: Bushings Cab, Core, Poly or Rubber? Sounds good. I think I may have missed your call, but am available now. Just give me a ring when you get a chance.

01-15-2014, 08:13 PM	#15
79Betty Registered User Join Date: Jan 2013 Location: Jasper, IN Posts: 948	Re: Bushings Cab, Core, Poly or Rubber? I have rex poly under my body. It rode so rough before with bad rubbers i haven't noticed a difference. With poly you don't have to worry about them later on in life which is nice __________________ When in doubt, throttle it out! 1974 Chevrolet Custom K20 2005 Ford Ranger Edge 1985 Chevrolet Custom Deluxe C10



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01-16-2014, 06:08 PM	#16
aotte1 Registered User Join Date: Oct 2013 Location: lousiville Ky Posts: 2,645	Re: Bushings Cab, Core, Poly or Rubber? I like rubber, poly did not work for me under load, the bushings were plastic and flowed. This was several years ago, maybe they are better now. I use rubber or aluminum only now. For highly stressed core support I only use rubber to help protect the radiator from stress/cracks. Les

01-16-2014, 10:44 PM	#17
dieseldawg142 Registered User Join Date: Jul 2011 Location: back 40, bc Posts: 3,906	Re: Bushings Cab, Core, Poly or Rubber? ifin you want to never deal with them again, go poly. i got it all over my crew, leafs swaybar, body, etc. poly made my susp. waaay better, & i dont know what people are saying about squeaks & lousy ride, when i installed them, i greased them liberally with lithium, have never heard a sound out of them. ride? exactly the same, (mind you, you dont have any ride with swampers anyways!), in fact the truck feels more "screwed down" then with rubber. and yeah, i installed the supossedly noisier red bushings, hey you haft to color coordinate

01-17-2014, 01:55 AM	#18
cory d Registered User Join Date: Dec 2011 Location: Arlington WA Posts: 1,728	Re: Bushings Cab, Core, Poly or Rubber? i have all poly up front, feels better than rubber. its not "harsh" or "stiff" way less floppy than rubber and they move freely. anyone else have a manual trans? my Z-bar and all clutch linkage is well greased but when i depress the clutch, it lifts the cab up. my bushings are in good shape and not loose. i plan on switching to poly bushings on those too. everything but the leaf eyes. those need rubber __________________ GMC C15 355 SM465 3.73 80 C10 cruiser build thread 79 short stepside crew cab. big and ugly. build thread

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