Question: 08' Express 2500 ....Front end violently shaking.... - Page 3 - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
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Old 04-22-2011, 10:34 AM   #21 (permalink)
doswacko
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Quote:
Originally Posted by NorCal 2500HD View Post
This started a few months back, going down the hill the front end shakes like crazy in 2 certain spots. Next day turned the rotors and put the pads back on and everything seemed fine. Following week same 2 spots did the exact same thing, but when I tried to slow down it seemed like the shaking got worse. Had the Idler and Pitman replaced few days later. Following week no shaking, thought I had it fixed. Week after that, came back again....Dealership said everything looked ok. Didnt know what else it could have been so I decided to do my route backwards....Never had the issue going down on the new side. So today I had to do the route the orig way and it happened again...I prepared myself and slowed down to about 40. I literally had to stop in the lane to get the shaking to stop.

Ive noticed it is worse when I have it stacked from the front of the fender-well to the back door. It also slightly happens when I hit a fairly large bump in the road.....

Rotors are good....
New Idler/Pitman Arm...
Tires are good..........


Any ideas on what can be causing this?
Thanks
Brian
Both my vans have the same problem from a month or so of new.
Empty or full they shake, braking down the large hills going to limerock park racetrack.
they dont shake the other direction.
The dealer has replaced almost everything they can think of.
Im almost thinking its the road, but my trucks dont have the problem.

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Old 08-05-2016, 03:47 PM   #22 (permalink)
mhck
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Same problem and solution on my 2007 GMC Savana Diesel

Quote:
Originally Posted by NorCal 2500HD View Post
So the problem has been solved....It was the front right tire and slightly warped front rotors.
The belts inside the tire were starting to separate.That mixed with the warped rotors would cause the problem. Slapped 4 new tires on and had the rotors turned and it has completely gone away......
I had the same problem start 4 days ago. I started looking into replacing steering components until I came across this thread. Turns out last time I had the tires rotated (5/18/16), they didn't adjust the pressure in one of my BFGoodrich All-Terrain T/A KO All-Terrain Radial Tires on the front. So I was running 80 psi in one tire up front, and the spec'd 50 psi in the other. Nonetheless, both front tires had internal belt splitting after 27k mi of mostly highway use. The tech told me the weight of the vehicle and motor up front can split the belts under high pressure, but that doesn't explain why the second tire split. The only thing I can think of that caused the splits are some railroad tracks close by the house that I cross on an almost daily basis. I spent $900 and had 4 Michelins put on and it drives very smooth. My rotors are almost new, so they were not the issue.

A note on the BF Goodrich T/A KOs (now they have the KO2s). They are beefy all terrain tires. There is no way two of them should have failed after 3.5 years & 27k mi. I drive them easy. I contacted BF Goodrich and they would not warranty or prorate the tires. The other negative about the tires is I lost 1 mpg using them, again on a diesel van.


Last edited by mhck; 08-05-2016 at 03:47 PM.
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Old 08-06-2016, 12:27 AM   #23 (permalink)
ShopSpecialties
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I can get 60,000+ miles out of Hankook Dynapro ATM. I never go by what is on the door sticker for PSI. Fronts at 65 always and rears go from 55-65 depending on what I am doing.
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Old 08-06-2016, 01:32 AM   #24 (permalink)
mhck
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Quote:
Originally Posted by ShopSpecialties View Post
I can get 60,000+ miles out of Hankook Dynapro ATM. I never go by what is on the door sticker for PSI. Fronts at 65 always and rears go from 55-65 depending on what I am doing.
Good to know, thanks. I never looked into Hankooks, but judging from the reviews and price they are winners. I drop the psi on the rears, but have never tried running a higher psi on the fronts. I appreciate the info.
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Old 08-08-2016, 03:18 PM   #25 (permalink)
jon-d
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very similar problem with my 03 van and recently experienced in on my 09. in both cases it was the same long hill that started it. the solution for my 03 at least was to change out the rotors to slotted ones with holes. I picked up a set from summet for about $200 I think? that permitted the hot gasses to escape during heavy braking. I never had another issue with those rotors even on the hill that caused the initial problem. now on to my 09..
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Old 09-18-2016, 02:47 PM   #26 (permalink)
carpetmike
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front end shake 08 express

i had same issue with mine. i got slotted rotors. they are thicker and cool better. dont tend to warp as easily
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Old 09-28-2016, 01:07 PM   #27 (permalink)
showtimextx
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Same issue here. Happens with my van loaded or not loaded down hills depending how I apply the brake. Looking at getting some good slotted rotors this winter. Had a couple scary shaking moments that the cost of all new rotors was justified.

Hope this fixes it.

I have roughly 10,000km on new tires air pressure has been changed (based on another thread). No idea if steering components are good but I need brakes anyways.
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Old 09-28-2016, 01:25 PM   #28 (permalink)
ShopSpecialties
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Most likely need an idler arm and possibly pitman also.
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2006 Chevy Express 1 Ton Ext Duramax, EFILive. Edge Insight CTS. Truck-Lite LED Headlight. Throttle Down Kustoms Bumper.TCI Deep Pan. Fumoto valve. Diamond Eye 4" Turbo Back Exhaust BYE BYE Kitty and Ruffler. B&M Supercooler. AEM dry filter with custom air intake made by yours truly. PCV Re-Route. Diamond Eye turbo direct pipe. Kennedy lift pump. EGR valve and cooler delete. Trex-Tech Up pipes. Batmowheel. Turbo Performance Products turbo sock. Setrab fanpack fuel cooler.

I am here to help 24/7 and if anybody has a issue with me I am also here 24/7 to resolve anything. Please feel free to pm, call, fax, email, anytime with any questions what so ever.

Duane
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