Urethane vs. Rubber Cab Mounts - The 1947 - Present Chevrolet & GMC Truck Message Board Network

HeavyK20 · 11-14-2002, 09:45 PM

I would like to hear some opinions on urethane and rubber cab mounts.
The only thing I have ever been told is that urethane lasts longer and rubber rides better.
Any other advantages/disadvantages?
Is the ride really that harsh with urethane?

**MikeB** · 11-14-2002, 09:52 PM

Got a rubber set from my Chevy dealer back in 1990. They were pretty much worn out (sagging and cracking) by 1996, so replaced them with Pro-Thane pieces. To this day, they still look like new. If there's a difference in the ride, I can't tell.

Alexis · 11-14-2002, 10:32 PM

go with poly, never notice a thing. Unless your a little sensitive, lol. but other then that they will last beyound your years.

Longhorn Man · 11-15-2002, 12:11 AM

I remember some talk on WES's board about the poly mounts beeing a bit too stiff and increasing the likelyhood of bed/cab contact...
but I really can't say. I just wanted to throw that out.

krazy_texan · 11-15-2002, 01:19 AM

i just put some polys on my 71 custom/20 bought them from brothers they work great but i just recently wrecked my truck and on of the ones under the radiotor fell off when i went to go pick it up at the impound it broke just like taking a doughnut and pulling in half but other than that incident i have no complaints

Low69CST · 11-15-2002, 04:31 AM

I would think that cab-bed contact would come from rubber ones because the rears would clapse more than urathane. If they are touching when sitting still, i can't see how a stiffer bushing would make them touch.

**Classic Heartbeat** · 11-15-2002, 11:29 AM

The cab to bed contact I am not sure about... But this I am, You have a truck with an extreemly flexible frame and a body that is either welded together and yes bolted too. Welded bodys can not flex with the frames without withstanding some damage. Damage may come in the future in the form of rattles and squeeks because the welds have broken loose, or if you are an avid off roader your mounts could just pull through the floor. Why??? You ask.... Because polly mounts don't flex nor do they give. Rubber does! If you have to replace your mounts every 5 or 10 years or so, well at least your truck will have survived to do so.... Anyway I have seen the problems that polly body mounts creat and have yet to see any benifite to them. Do they help you corner better? No.. Do they give you a better feel for the road?? I doubt it... Are they pretty? Well I guess they are, but how many times do you lay on the ground on your back and gaze at them? LOL This is why I don't even offer polly cab mounts for sale on my website... I would stay with rubber, their benifates far out way their short falls. WES www.ClassicHeartbeat.com

RON WOODGEARD · 11-15-2002, 12:23 PM

I have "POLY" mounts, I used them for a couple of years when my 70 was Raised. When I started the lowering job, I got the same thing from "TUCKERS" in VEGAS that "WES" is telling us. But JERRY at TUCKERS says he got a "LOT" of complaints on the ride quality and many of his customers changed back to factory.
I did not notice the difference in the ride quality while my truck was raised.But it was already pretty stiff from suspension.

My "POLY'S" look like new.

RON

11-14-2002, 09:45 PM	#1
HeavyK20 Registered User Join Date: Dec 2001 Location: New Richmond, WI Posts: 547	Urethane vs. Rubber Cab Mounts I would like to hear some opinions on urethane and rubber cab mounts. The only thing I have ever been told is that urethane lasts longer and rubber rides better. Any other advantages/disadvantages? Is the ride really that harsh with urethane? __________________ Eric 1969 K20, 465/205 package

11-14-2002, 09:52 PM	#2
MikeB Senior Member Join Date: Jul 2000 Location: North Texas Posts: 3,568	Got a rubber set from my Chevy dealer back in 1990. They were pretty much worn out (sagging and cracking) by 1996, so replaced them with Pro-Thane pieces. To this day, they still look like new. If there's a difference in the ride, I can't tell. __________________ Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!

11-15-2002, 01:19 AM	#5
krazy_texan Registered User Join Date: Oct 2002 Location: West Des Moines, Ia Posts: 3,233	i just put some polys on my 71 custom/20 bought them from brothers they work great but i just recently wrecked my truck and on of the ones under the radiotor fell off when i went to go pick it up at the impound it broke just like taking a doughnut and pulling in half but other than that incident i have no complaints __________________ Krazy Texan My Trucks are made with Wrenches not Chop Sticks 1967 GMC 3/4 ton "Johnny Cash" 1990 v1500 suburban 1967 Ford f100 Swb 4x4 "green bean" GOD BLESS JESUS, JOHN WAYNE, AND THE ALAMO

11-15-2002, 04:31 AM	#6
Low69CST Registered User Join Date: May 2000 Location: Frankfort, Kentucky, USA Posts: 2,163	I would think that cab-bed contact would come from rubber ones because the rears would clapse more than urathane. If they are touching when sitting still, i can't see how a stiffer bushing would make them touch. __________________ '69 CST Short fleetside Lowered, 400 small block, 700R4, 4 wheel disc brakes, front sway bar & rear camaro sway bar (in progress) '87 V10 4x4 Short Fleetside Quad Suspension and Dual Tanks

11-15-2002, 11:29 AM	#7
Classic Heartbeat Project Junkie! Fishing Poor!! Join Date: Dec 1999 Location: Olympia,Wa. 98512 Posts: 10,768	The cab to bed contact I am not sure about... But this I am, You have a truck with an extreemly flexible frame and a body that is either welded together and yes bolted too. Welded bodys can not flex with the frames without withstanding some damage. Damage may come in the future in the form of rattles and squeeks because the welds have broken loose, or if you are an avid off roader your mounts could just pull through the floor. Why??? You ask.... Because polly mounts don't flex nor do they give. Rubber does! If you have to replace your mounts every 5 or 10 years or so, well at least your truck will have survived to do so.... Anyway I have seen the problems that polly body mounts creat and have yet to see any benifite to them. Do they help you corner better? No.. Do they give you a better feel for the road?? I doubt it... Are they pretty? Well I guess they are, but how many times do you lay on the ground on your back and gaze at them? LOL This is why I don't even offer polly cab mounts for sale on my website... I would stay with rubber, their benifates far out way their short falls. WES www.ClassicHeartbeat.com __________________ On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys

11-14-2002, 10:32 PM	#3
Alexis Member since 2000 Join Date: Dec 2000 Location: Mountain View Ca / Mexico Posts: 7,879	go with poly, never notice a thing. Unless your a little sensitive, lol. but other then that they will last beyound your years.

11-15-2002, 12:11 AM	#4
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	I remember some talk on WES's board about the poly mounts beeing a bit too stiff and increasing the likelyhood of bed/cab contact... but I really can't say. I just wanted to throw that out.

11-15-2002, 12:23 PM	#8
RON WOODGEARD Resident Young Old Dude ! Join Date: Jul 2001 Location: Nevada Posts: 1,948	I have "POLY" mounts, I used them for a couple of years when my 70 was Raised. When I started the lowering job, I got the same thing from "TUCKERS" in VEGAS that "WES" is telling us. But JERRY at TUCKERS says he got a "LOT" of complaints on the ride quality and many of his customers changed back to factory. I did not notice the difference in the ride quality while my truck was raised.But it was already pretty stiff from suspension. My "POLY'S" look like new. RON



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