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1997 - 2003 F-150

Need help please!!

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Old Apr 7, 2011 | 03:37 PM
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From: KY
Need help please!!
what would make my 97 F150 4x4 have a vibrating sound like ur going over rumble strips when you step on the gas sometime? i already change the rearend gear oil and add additive to it..
 
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Old Apr 7, 2011 | 03:48 PM
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From: Joplin MO
Bad u-joints.
 
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Old Apr 7, 2011 | 04:06 PM
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ok ty.. i will try that.. i was hoping it wasnt the tranny cause i had that fixed 5 years ago..
 
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Old Apr 7, 2011 | 04:55 PM
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From: Joplin MO
Drop the driveshaft - you will be able to tell right away if they are loose. You might even be able to see looseness just by shaking and trying to rotate the driveshaft in place.
 
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