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Old 04-07-2007, 05:51 PM   #1
young grasshoppa
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Question Excessive vibrations?

My 72 C-10 (350/3sp) is vibrating badly under acceleration. Before there was only a slight vibration, but now it shakes the whole truck. It is most noticeable from a stop. At cruising speed it is fine (until acceleration).
What's most likely wrong?
Thanks

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Old 04-07-2007, 06:43 PM   #2
dave2953
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Re: Excessive vibrations? :confused:

Do you have a 2 piece drive shaft? I would think it's the center support bearing, but that usually causes a vibration even if you aren't accelerating (driving) You could check it if you have one just to rule it out.
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Old 04-07-2007, 07:01 PM   #3
cdowns
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Re: Excessive vibrations? :confused:

check for worn broken motor mounts
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Old 04-07-2007, 07:11 PM   #4
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Re: Excessive vibrations? :confused:

U-joint or center support. Better get it fixed or you are in for a surprise.
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Old 04-07-2007, 11:42 PM   #5
young grasshoppa
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Re: Excessive vibrations? :confused:

Quote:
Originally Posted by jhow66 View Post
U-joint or center support. Better get it fixed or you are in for a surprise.

Ha Ha

Surprise it was! I tried going for another spin, and barely made it down the road. I shattered the drive shaft off of the U Joint. There is play is the support bearing.
Luckily it was just down the road from the house. So now there are two things to fix.

Thanks for the help
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Old 04-07-2007, 07:19 PM   #6
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Re: Excessive vibrations? :confused:

if you sit still, left foot on the brake, right one stabbin the gas... do you feel the same vibration?
If so, you need to look towards a tune up.
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Old 04-07-2007, 07:25 PM   #7
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Re: Excessive vibrations? :confused:

Check this:
http://www.napaonline.com/masterpage...ng+%26+Support
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Old 04-07-2007, 07:27 PM   #8
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Re: Excessive vibrations? :confused:

And this:
http://www.napaonline.com/MasterPage...t+Transmission
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