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Old 06-26-2010, 09:00 PM   #1
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Front tire vibration at low speeds

I have condition that I need help with troubleshooting. While traveling a lower rates of speed, when I hit a series of bumps in the road on the curbside, my front tire starts to vibrate to where it jerks the steering wheel back and forth until I slow down. I had my front end checked by a large truck mechanic and he found nothing loose. I suspect that it might be a stabilizer shock. Can anyone help me narrow my search?
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Old 06-27-2010, 07:34 AM   #2
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Darel,

I don't think the stabilizer shock alone is going to resolve your problems. At a minimum you're going to need to replace the front shocks as well. I'm betting that you probably have loose ball joints as well.

After replacing those items let us know what the results are. I'm betting that you have bad ball joints as well.

Brad
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Old 06-27-2010, 03:09 PM   #3
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Brad,
The stabilizer shock looks pretty new with no rust on the crown nut. So I figured that the previous owned must have changed it to try to eliminate the problem. I will change the shocks and let you know the out come. Thanks for the input. I really appreciate it.
Darel
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Old 06-27-2010, 03:42 PM   #4
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Is your truck a ford?
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Old 06-27-2010, 04:48 PM   #5
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Is your truck a ford?
Carl,

Darel was asking about the front suspension on his Argosy motorhome which sits on a Chevy P30 chassis.

Brad
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Old 06-27-2010, 05:19 PM   #6
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Hi, getting the shakes after hitting a bump in the road is caused by a few things;

(1.) Loose or worn suspension parts.

(2.) Zero, or very close to it, toe in/out.

(3.) Loose or worn wheel bearings.

(4.) Worn, or out of adjustment, steering gear box.

(5.) Any of the above, especially with an "I" Beam axle.

(6.) Worn out steering dampner/stabilizer.

Note: Although a steering dampner/stabilizer can and will, in some cases, stop this from happening, [wheel shake] it's primary purpose is to help keep the steering wheel from ripping your hand off during sudden bumps to your steering tires/wheels. You still need to fix the cause of the problem.
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Old 06-27-2010, 05:54 PM   #7
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I think if I were you I'd get my kreeper and roll under that baby and check all the tye-rod ends for play,it's very possible you have some worn steering parts. Jackup that front end and grab the top of each front wheel and check those KING PINS. The other most likely cause is a mis-alignment and bad shocks. If you are not capable of doing these tests,please find a big truck dealer,KW,Peterbilt,Freightliner ,they all have alignment machines and know how to properly check a heavy duty front-end such as you have.
GOOD LUCK
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Old 07-01-2010, 10:14 PM   #8
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The guy that checked my front suspension lives about 30 miles (mostly highway)away. No problems on the trip there and back. I checked the shocks and they both were bad. Replaced them last Saturday. I will be taking it for a short trip this weekend. I will let you know if I have any vibration.

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Old 07-10-2010, 07:19 PM   #9
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Back from a weekend trip in Michigan. The handling was smoother as far as the ride. No slap that I had experience since buying back in '03. As for the vibration on bumps at low speed, I didn't experiece it either. To know for sure, I need to take it to places that I have had it happen to me before. King pins may still need replaced.
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Old 08-03-2010, 08:03 PM   #10
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In an attempt to fill the front suspension airbags to the proper psi, I found them to have leaks. I ordered the new airbags from Air Lift Company for $132.54 to my door. I will do the install when they arrive.
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Old 08-04-2010, 12:31 PM   #11
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In an attempt to fill the front suspension airbags to the proper psi, I found them to have leaks. I ordered the new airbags from Air Lift Company for $132.54 to my door. I will do the install when they arrive.
Darel,

Prepare yourself for some bloody knuckles. Replacing those air bags on our 310 was a chore I won't soon forget. There are some good posts on the forum about replacing the bags. If you haven't already I would read them and follow their advice.

The one thing I would do different the next time is to use a water soluable hand cleaner as a lubricant. Slather a lot on them before and during the process of installing them.

Patience will also help a lot when installing them, and of course a few of your best choice words will as well .

Brad
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Old 08-05-2010, 10:26 PM   #12
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First and foremost I would like to thank everyone who has contributed their experiences on this forum. Your experience and knowledge are a huge asset. I replace my air coils tonight with minimal problems. I took from the experiences that were posted on this site that I found to make the most sense to me and my situation.
On Tuesday, I ordered my air coils for the Airlift website and printed their instuctions from their website and thought that I would get a jump on the tare out before the new aircoils came in. Following the instructions did not help. The removal was for the OEM aircoils which are black. My old aircoils were orange (heavy-duty), so twisting and pulling throught the small hole with vise-grips wasn't working. I couldn't get them to collapse enough. I resorted to cutting them in half with a utility knife, which didn't work too well either. I couldn't cut through with the knife. I was done for the night. Tonight (Thursday) they came in the mail and I had a revolation at work. I got out my cordless reciprecating saw with a long blade and was able to get the first one cut in two. It collapsed enough to get it through the hole. I got it out in about four pieces. Now for the install. I found that the squeezing them down and putting the valve stem cap on didn't hold well, so I squeezed it down and inserted a valve stem. I used the hose clamp method with moving the clamps long the way. Then I finished it with my floor jack. All ideas came from this site. It took about 3 hrs for the first side and about an hour and a half on the other. Doing the overnight air test right now. Thanks again for everyones input on this subject and al the rest.
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Old 08-06-2010, 05:23 AM   #13
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Pics of the install.
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Old 08-06-2010, 11:24 AM   #14
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Darel,

Glad you found a method that worked for you. Once installed I felt the ride improvement was worth the effort.

Brad
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