cab bushing issue

[jlaird]

Today while I was working on my truck i noticed something black on the ground. A brand new rubber cab bushing split into about four pieces and fell to the ground. It was the cone shaped one that goes under the driver side forward position. Has this ever happened to anyone? I remember when I was torquing them to the 40-50 ft lbs that the passenger side one torqued down fine, but the driver side one would NOT torque, it just kept tightening. So I ended up measuring how much the cab was compressed on the torqued passenger side and matched the measurement on the driver side.

So with all that said, I think I'm going to forgo the rubber bushing and buy some poly ones. Any thoughts on this ordeal?

[LockDoc]

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I think you would be sorry... I will be back to add to this post in a minute....

Edit: OK, type "rubber or poly" without the quotes in the Google search box at the top of the page, click on the circle in front of "67-72chevytrucks.com, and click on the "Google" button. read some of the threads then draw your own conclusion...

Just my 2¢ worth.

LockDoc

[70cst]

Originally Posted by LockDoc

-
I think you would be sorry... I will be back to add to this post in a minute....

Edit: OK, type "rubber or poly" without the quotes in the Google search box at the top of the page, click on the circle in front of "67-72chevytrucks.com, and click on the "Google" button. read some of the threads then draw your own conclusion...

Just my 2¢ worth.

LockDoc

Very good advise...

[bobs409]

That's typical chinese repro rubber! Stuff should be outlawed.

I have poly's in all 3 of my trucks and have no issues at all with them. They'll outlast the trucks in fact. I noticed no difference in ride but some say they have. ??

So go poly or keep replacing those rubber ones every year. lol

[jlaird]

Ok, I just read every post on hear about poly vs rubber and if I do go with poly, I will go with polygraphite, BUT bobs409 brought up a good point. Were my new rubber bushings of a lesser quality than other rubber kits? I don't know, I got them from GMCpaul here on the boards. Can anybody tell me where to get a quality, Made in the USA bushings?

[Shyguy]

Originally Posted by jlaird

Ok, I just read every post on hear about poly vs rubber and if I do go with poly, I will go with polygraphite, BUT bobs409 brought up a good point. Were my new rubber bushings of a lesser quality than other rubber kits? I don't know, I got them from GMCpaul here on the boards. Can anybody tell me where to get a quality, Made in the USA bushings?

If I were you I would get in touch with GMCpaul and let him know what happened, he should be able to tell you if anyone else has had this problem.

I have heard that rubber bushings give a better ride, but my son went with the other type on both of his trucks he restored and they seem to be working out ok.

Since he is the one that is teaching me and helping me restore my '67 I am going with the same ones he used.

[crazy longhorn]

I have poly under my Longhorn, & no issues(it is a stiffer ride). I actually think the poly eng mounts are harsher, as you get to feel the vibes especially @ idle speed @ the lights.....but its a toy, you get the vibes,along with the screamin gears in that Richmond, loud pipes,headers & heavy valve springs & a roarin 4brl (drawing through a 14x4 K&N This is all compounded by the bare steel floor crazyL

[litew8]

Originally Posted by jlaird

Ok, I just read every post on hear about poly vs rubber and if I do go with poly, I will go with polygraphite, BUT bobs409 brought up a good point. Were my new rubber bushings of a lesser quality than other rubber kits? I don't know, I got them from GMCpaul here on the boards. Can anybody tell me where to get a quality, Made in the USA bushings?

Not entirely sure it makes a difference if the CAB bushings are polygraphite vs red.
The cab doesn't actually "move" like other components (read suspension) do.
That's where you'd benefit (help prevent squeeking) most from polygraphite - moving suspension parts.
I've got red brand on mine (new, see build thread).

IMO

Originally Posted by crazy longhorn

I have poly under my Longhorn, & no issues(it is a stiffer ride). I actually think the poly eng mounts are harsher, as you get to feel the vibes especially @ idle speed @ the lights.....but its a toy, you get the vibes,along with the screamin gears in that Richmond, loud pipes,headers & heavy valve springs & a roarin 4brl (drawing through a 14x4 K&N This is all compounded by the bare steel floor crazyL

I'd use rubber if at all possible on parts that move excessively.

[turp mcspray]

I've seen NOS rubber bushings split and crack after 6 mos. on the road. Maybe just a fluke. I put poly on my blazer back in '97 or '98, and have not had any complaints. It is a 4x4, with 6" lift and 35 inch tires, with chambered mufflers, so I couldn't tell you if the ride is rougher, or if they squeek. But I do know that they are still there, and nothing is cracked or broke.

[jlaird]

What do you guys torque the front cab mount to?

[litew8]

Originally Posted by jlaird

What do you guys torque the front cab mount to?

I was told to just get them snug. Though that's all I know/heard.

Then again, maybe someone can confirm this -
http://67-72chevytrucks.com/vboard/s...d.php?t=333848

"The front cab mount bolts torque specification is 50 lb./ft.
The rear cab mount bolts torque specification is 20 lb./ft. (which is the same for the radiator support mounts)." - JimKshortstep4x4

"the only problem you will have and i did it on a 1965 3/4 ton is you will pull the washer throw the floor there is no way your going to hurt the rubbers its the cab Fl;oor you have to worrie about" - stsalvage