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Clunking sound when letting off throttle

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Old Sep 19, 2004 | 08:16 PM
  #1  
460_Sprout's Avatar
460_Sprout
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From: Thorold, Ontario, Canada
Clunking sound when letting off throttle

I have only had the truck for a short while and its only been on the road for the last 2-3 days. I noticed tonight when I let off the throttle there is this clunking sound, and it also happens when I re-apply the throttle but not as bad. I was wondering if this may be a bad tranny mount or something like that? Any ideas?

BTW its a 1977 F250 4x4 with 35 inch tires.
 

Last edited by 460_Sprout; Sep 19, 2004 at 08:22 PM.
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Old Sep 19, 2004 | 10:11 PM
  #2  
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hdgapeach
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From: Franklin, GA
Motor mount, tranny mount, universal joint, ring & pinion......
Check the u-joints first. They're easy enough to grab hold of by hand and check for slop. The rest (unless extremely obvious) might be easier with a passenger listening and looking to pin point the location while you operate the truck and reproduce the "clunk".
 
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Old Sep 19, 2004 | 10:22 PM
  #3  
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460_Sprout
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From: Thorold, Ontario, Canada
I'll chekc the u-joints tomorrow. The sound seems to be coming from directly under the cab, or just behind it.
 
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