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Vibrations

Old May 2, 2007 | 10:23 AM
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Vibrations

I have an 89 f350 w/ 351, For some reason when ever I accelerate hard or am crusing at around 50 - 60mph the truck the vibrating like hell? I have replaced the read universel's twice already. Could it be the front one or could it be that i have a warped drive shaft. Im thinking about pulling it apart this weekend and rolling it on the ground to see if it is warped. Could the vibrations be caused by anything else. Oh and the front end was just redone no more then 6 months ago. Thanks
 
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Old May 2, 2007 | 12:33 PM
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is it an automatic or stick?? it could be an out of balance driveshaft. or could be in the tranny. if you have a miss in the motor and an auto tranny you can also get a bad vibration at different times.
 
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Old May 2, 2007 | 02:01 PM
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its an auto and the trani was rebuilt last year
 
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Old May 2, 2007 | 02:31 PM
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do you know which tranny you have?? aod or c6
 
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Old May 3, 2007 | 08:13 AM
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I wanna say aod but I am not sure. Is there any way to find out. I know it is the stock tranni
 
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Old May 3, 2007 | 09:30 AM
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is it 4sp=aod, or 3 sp=c6. if it's the aod you will have a cable running from the tranny to the throttle linkage on the motor.
 
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Old May 3, 2007 | 06:13 PM
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Change the other u-joint as well. Its only like 12 dollars. If one was bad chances are the other was not too far behind.
 
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Old May 3, 2007 | 09:56 PM
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Ill have to check this weekend what type of tranny it is because I am not with the vechile, Its at home and I am at college been werkin on it on the weekends. But ya I think im definitly gunna change the other U joint out. thanks
 
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Old May 4, 2007 | 12:09 AM
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Sounds like a drive shaft issue.
 
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