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Clunking when accelerating and letting off

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Old Sep 21, 2006 | 09:29 PM
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mrl390
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Clunking when accelerating and letting off
I have a 1993 F150 4x4 with a 5.0. When I am accelerating and i quickly let off the gas, there is a loud clunk. I also hear this clunk when i let the truck coast and engine break then put my foot back on the pedal. What is this clunk? Its driving me crazy.
 
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Old Sep 21, 2006 | 09:47 PM
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Real good chance it is a driveshaft universal joint. Service immediately!
 
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Old Sep 21, 2006 | 09:48 PM
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Take a look at the u-joints, that's a possibility.
 
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Old Sep 21, 2006 | 10:28 PM
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After checking the u-joints, check the transmission and motor mounts.
 
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Old Sep 21, 2006 | 10:52 PM
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and carrier bearing if you have one
 
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Old Sep 22, 2006 | 06:43 PM
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Everyone says check the U-joints. What am i looking for?
 
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Old Sep 22, 2006 | 07:19 PM
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both ends of the driveshaft. see if they are loose.
 
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Old Sep 22, 2006 | 08:27 PM
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i find it helps to jack up the rear end while checking the U joints on the drive shaft.
 
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Old Sep 22, 2006 | 10:04 PM
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There is a TSB on the tranny mount. Common issue.
 
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