GMC HD Suspension BOUNCE (expansion joints) - Page 54 - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
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Old 10-28-2010, 12:11 AM   #531 (permalink)
LA DMAX
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Quote:
Originally Posted by RJWesleyIII View Post
whats the difference between this upper and the one listed above? (25791031)
Not exactly sure what they changed if they even did change anything about it, but if you order the 25791031 it will say it's been superseded by the number I gave.

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Old 10-28-2010, 09:20 AM   #532 (permalink)
sarends
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I have an 08 crew cab 2500HD Duramax with a Rancho 4" Lift. It rode and bounced like crap when I first bought it. I went from 35" tires to the 33" Michelin LTX MS2 tires, which made a small, but noticeable improvement in ride quality/smoothness. Then I discovered this thread (because I was searching desperately for a solution to my truck's bouncy ass craziness) and installed the cab mounts. The truck is simply TRANSFORMED - I could not be more pleased. In fact, it is hard for me to understand how such a simple fix could make such a gigantic difference.

I am the most surprised reading this thread that the overwhelming consensus isn't full tilt elation over the way the cab mounts vastly improve the ride. I have thought a few times (while reading the lukewarm positives on what the cab mounts do) that perhaps my improvement was greater than everyone elses BECAUSE my truck had a 4" lift. Anyway, DO IT, it will make a HUGE difference!

Quote:
Originally Posted by gsdzel View Post
Will these body mount parts work for Lifted Truck?

I see alot stock height trucks using the upgraded cab mounts, not too many lifted trucks? Cognito 7-9 Lifted...

From what I saw, this can be a "Do it" yourself project? These are part #'s that has been identified?

http://www.gmpartsdirect.com/

GM PART # 25791031
CATEGORY: All
PACK QTY: 2
CORE CHARGE: $0.00
GM LIST: $38.78
OUR PRICE: $23.80

GM PART # 25791032
CATEGORY: All
PACK QTY: 2
CORE CHARGE: $0.00
GM LIST: $38.78
OUR PRICE: $23.80

GM PART # 15854745
CATEGORY: All
PACK QTY: 2
CORE CHARGE: $0.00
GM LIST: $3.47
OUR PRICE: $2.13


Any guidance would be appreciated?

GSDzel

www.spectrumgpstracking.com
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Last edited by sarends; 10-28-2010 at 09:25 AM.
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Old 10-29-2010, 07:05 PM   #533 (permalink)
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Quote:
Originally Posted by sarends View Post
I have an 08 crew cab 2500HD Duramax with a Rancho 4" Lift. It rode and bounced like crap when I first bought it. I went from 35" tires to the 33" Michelin LTX MS2 tires, which made a small, but noticeable improvement in ride quality/smoothness. Then I discovered this thread (because I was searching desperately for a solution to my truck's bouncy ass craziness) and installed the cab mounts. The truck is simply TRANSFORMED - I could not be more pleased. In fact, it is hard for me to understand how such a simple fix could make such a gigantic difference.

I am the most surprised reading this thread that the overwhelming consensus isn't full tilt elation over the way the cab mounts vastly improve the ride. I have thought a few times (while reading the lukewarm positives on what the cab mounts do) that perhaps my improvement was greater than everyone elses BECAUSE my truck had a 4" lift. Anyway, DO IT, it will make a HUGE difference!
What shocks you runnin'?
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Old 10-30-2010, 05:35 AM   #534 (permalink)
sarends
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Rancho RS9000 adjustible

Before the cab mounts, I tried every combination I could imagine of tire pressure and shock setting. The best combo was low tire pressure and a setting of 2 - 4 on the Ranchos all around.

However, changing the tire pressure and Rancho settings made minor changes in the "crazy ass bounciness" - at optimized tire pressure and shock setting I MAYBE made a 5% improvement in "crazy ass bounciness".

The cab mounts have, for all practical purposes, eliminated the bounciness.

SInce the cab mounts, I can now increase both my tire pressure and Rancho firmness (which I have done) without increasing the bounciness. I increased the tire pressure and Rancho settings because I prefer a little stiffer overall ride.


Quote:
Originally Posted by tileman2003 View Post
What shocks you runnin'?
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Last edited by sarends; 10-30-2010 at 05:36 AM.
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Old 10-30-2010, 08:51 AM   #535 (permalink)
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I put these cab mounts in my 09 and I never really thought it made much difference until I bought a used 08. Now I can see the difference they make. The 08 is much rougher even with 17 wheels instead of 20's on my 09.
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Old 10-30-2010, 09:20 PM   #536 (permalink)
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So do I need 2 of each of the 3 part numbers?
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Old 10-31-2010, 06:32 AM   #537 (permalink)
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Bigger the wheel the less sidewall on that tire. Trucks bounce worse for that reason and you have to soften the suspension to kill that Cali bounce. It's just the way the truck bounces. Bigger costs more to turn and burn so if you love the look be ready to pay for the rest. 16'' wheels and tires just seem to work better for me I'm stayin' with it.
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Old 11-25-2010, 09:49 AM   #538 (permalink)
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I just did the replacement on my 2003 3500 and indeed a big difference in ride quality was had.

To answer some of the recent questions. The upper mount is new and hydrolic. The lower rubber bushing is taller than the stock one on my truck, so its a new part as well, and then the lower washer allows the lower rubber bushing to roll over, but it looks the same as the stock part.

Ride improvement is substantial, even on a 1 ton.
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Old 12-08-2010, 11:56 PM   #539 (permalink)
captjohn
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My dealer attempted the upgrade today but said the bolts were too short. I have nerf bars that use the bolts but its mount is only 1/4" thick. They said the bushings themselves were 1/2" thicker and add the 1/4" for the mount lost 3/4" on the bolt length. Did anyone else have this problem? I left it there and they were calling GM. Is the replacement bushing much larger in diameter? The one I saw looked like a steel flying saucer and much larger for the upper and the lower was a little taller than OEM.
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Old 12-09-2010, 12:30 AM   #540 (permalink)
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I had no problems installing them at all. I have bars as well and there was plenty of bolt left over. Now with that being said. I bought my truck with the bars already on it. I don't know if those were factory bolts or not. Sounds fishy to me IMHO.
God Bless and Good Luck.
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