The ship sinks slowly! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

moneyeater · 04-29-2008, 10:33 PM

My cab is sagging on the driversside and i allready put some shims between the cab and mounts! And i realize that it´s still sagging!
What can i do about that and what is the problem?
Is the structural integrity weak? Do i have to take the cab of the frame?
In the pic you can see that the bodylines don´t match ihad them close with the shims and now its almost as bad as before!
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Views: 318
Size: 84.9 KB

bigblock73 · 04-29-2008, 11:00 PM

Replace the cab mounts/bushings. It is either that, or your floor or the cab perches are rotting away. You don't need to remove the cab to replace the bushings.

spr85gmc · 04-29-2008, 11:36 PM

Quote:

Originally Posted by bigblock73

Replace the cab mounts/bushings. It is either that, or your floor or the cab perches are rotting away. You don't need to remove the cab to replace the bushings.

SO THENHOW DO U DO IT ?

84 400 · 04-30-2008, 01:49 AM

Quote:

Originally Posted by spr85gmc

SO THENHOW DO U DO IT ?

cab bushings are done with a 4x4 or any solid block of wood and a floor jack. remove bolt ,jack slightly remove old bolt, remove bushing, jack enough to fit new bolt and bushing, re torque bolt. some times it helps to loosen al the cab mount bolts.

Okay i know you may not need to use new bolts but I always replace mine after seeing some of the bent and sheared ones

bigblock73 · 04-30-2008, 01:54 AM

Quote:

Originally Posted by spr85gmc

SO THENHOW DO U DO IT ?

Ian pretty much covered it, but if you need more info, here you go.

http://www.73-87.com/7387garage/exte...b_bushings.htm

moneyeater · 04-30-2008, 08:28 PM

Hmmm-- the cabmounts are new ones from energy suspension and the cab was sandblasted,inspected and then painted. Ok all that was 7 or 8 years ago but the truck has never been on the street or even outside the shop!!!

moneyeater · 05-02-2008, 12:04 AM

Is it possible that the framebrackets that hold the cabmounts are weak or loose and sag with the weight of the cab?

slug · 05-02-2008, 12:24 AM

Just Crawl Under And Check It Out. You Should Be Able To Tell If The Frame Mount Is Bent Or Comeing Loose From The Frame

tyjoja · 05-02-2008, 05:01 AM

also change your front body bushing on either side of the radiator, did all six of mine and had no trouble at all, hear some have trouble getting the bolts loose if you have any probs with rust. I also bought the poly bushings from energy suspension. good luck

04-29-2008, 10:33 PM	#1
moneyeater Registered User Join Date: Feb 2003 Location: Northern Germany,near Bremen Posts: 684	The ship sinks slowly! My cab is sagging on the driversside and i allready put some shims between the cab and mounts! And i realize that it´s still sagging! What can i do about that and what is the problem? Is the structural integrity weak? Do i have to take the cab of the frame? In the pic you can see that the bodylines don´t match ihad them close with the shims and now its almost as bad as before! __________________ My little US vehicle parts business: http://www.thegearheaddepot.com/ Come have a look! ´81 GMC C 10, Spanish Red Last edited by moneyeater; 04-29-2008 at 10:36 PM.

04-29-2008, 11:00 PM	#2
bigblock73 yeller Join Date: Oct 2001 Location: Twin Cities Posts: 13,824	Re: The ship sinks slowly! Replace the cab mounts/bushings. It is either that, or your floor or the cab perches are rotting away. You don't need to remove the cab to replace the bushings. __________________ Jeff 73-87.com 73-87.com Facebook page 73-87 cab corner 6x9 speaker brackets for sale 67-72 cab corner speaker brackets for sale 47-54 cab corner speaker brackets for sale Last edited by bigblock73; 04-29-2008 at 11:00 PM.

04-30-2008, 08:28 PM	#6
moneyeater Registered User Join Date: Feb 2003 Location: Northern Germany,near Bremen Posts: 684	Re: The ship sinks slowly! Hmmm-- the cabmounts are new ones from energy suspension and the cab was sandblasted,inspected and then painted. Ok all that was 7 or 8 years ago but the truck has never been on the street or even outside the shop!!! __________________ My little US vehicle parts business: http://www.thegearheaddepot.com/ Come have a look! ´81 GMC C 10, Spanish Red

05-02-2008, 12:04 AM	#7
moneyeater Registered User Join Date: Feb 2003 Location: Northern Germany,near Bremen Posts: 684	Re: The ship sinks slowly! Is it possible that the framebrackets that hold the cabmounts are weak or loose and sag with the weight of the cab? __________________ My little US vehicle parts business: http://www.thegearheaddepot.com/ Come have a look! ´81 GMC C 10, Spanish Red

05-02-2008, 12:24 AM	#8
slug Registered User Join Date: Jan 2008 Location: Groves,TX Posts: 483	Re: The ship sinks slowly! Just Crawl Under And Check It Out. You Should Be Able To Tell If The Frame Mount Is Bent Or Comeing Loose From The Frame __________________ there is nothing better than cutting metal with fire.......except cutting metal with electricity!!!

05-02-2008, 05:01 AM	#9
tyjoja Registered User Join Date: Jan 2007 Location: albany oregon Posts: 168	Re: The ship sinks slowly! also change your front body bushing on either side of the radiator, did all six of mine and had no trouble at all, hear some have trouble getting the bolts loose if you have any probs with rust. I also bought the poly bushings from energy suspension. good luck

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