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Old 07-07-2011, 08:40 PM   #1
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shaking silverado


I have an extended cab 4wd 2000 silverado. The truck shake a little at exactly 20mph. I notice it more when i am giving it gas. I can feel the vibration in the pedal. Its fine once it hits 25 but will do it again at 60mph. I also make a weird clanking sound, usually when the truck is cold, which only happens at low speeds but goes away once i get moving. It sounds like it is coming from behind be. I was thinking driveshaft. What do you guys think. How can i troubleshoot it?

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Old 07-07-2011, 09:00 PM   #2
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shaking silverado


sounds like a driveshaft u-joint. jack up the truck so rear wheels are off the ground and check for play in the joint. If there is any, replace it

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Old 07-07-2011, 10:57 PM   #3
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shaking silverado


pull out drive shaft and lubricate splines in yoke. super typical for GM trucks.
shake at low speeds - you need to give more info.
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Old 07-08-2011, 08:45 AM   #4
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shaking silverado


I believe that Mr. Chips and Ukrkoz have you on the right track, so I would definitely proceed as they described. Along with that, although I think they have been discontinued, and don't know if they were still using them in 2000, or not, check to see if your rear drive shaft is one piece or two, and, if two, check that all three u-joints are synched, or oriented the same. Also, my brother had a GM pickup sometime around then that had a composite driveshaft, which he had to replace, due to an incurable imbalance.
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Old 07-09-2011, 07:59 AM   #5
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shaking silverado


Quote:
Originally Posted by DexterII View Post
I believe that Mr. Chips and Ukrkoz have you on the right track, so I would definitely proceed as they described. Along with that, although I think they have been discontinued, and don't know if they were still using them in 2000, or not, check to see if your rear drive shaft is one piece or two, and, if two, check that all three u-joints are synched, or oriented the same. Also, my brother had a GM pickup sometime around then that had a composite driveshaft, which he had to replace, due to an incurable imbalance.
I think only the reg cab with longer beds still use a two piece with a center carrier bearing assembly, but I do agree, sounds like a drive shaft issue.
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Old 07-09-2011, 09:37 AM   #6
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shaking silverado


well, he needs to be less worried about yoke. that slow speed shake points either towards trannie or ignition issues, and that is more important. those trucks are known to clunck and rattle into hundreds of thousands of "start and go" miles.
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Old 07-09-2011, 10:49 AM   #7
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shaking silverado


sounds like a ujoint , i would change it cause they are not greasable and need to be replaced eventually anyways , plus its cheap and will eliminate 1 possible cause if its not the ujoint. always go with the 'spicer' brand if you can .

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