General Ford Discussion General discussion of Ford vehicles not pertaining to the Ford Ranger.

rear end whine

  #1  
Old 11-24-2013
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rear end whine

My 2011 ranger 4.0 5 speed manual 4x4 w/ 50K has developed a high pitched
whine coming from the rear end. Ideas?
 
  #2  
Old 11-24-2013
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Possibly the pinion bearing.
Could be wheel bearings.

Need more info.
What speed, only under load?
 
  #3  
Old 11-24-2013
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No load...the pitch increases with speed
 
  #4  
Old 11-24-2013
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By under load I mean on the gas. As in does it happen when you're coasting and off the gas
 
  #5  
Old 11-24-2013
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a howl or whine can be a few things, bearings are first guess, gears are the second. drain the fluid and see how much metal is in it.
 
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