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rear grind while turning from stop

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Old Apr 12, 2010 | 08:14 AM
  #1  
wolfgang031691's Avatar
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rear grind while turning from stop

I have a 2002 F150 XLT FX4. It doesn't happen every time but it only happens when turning from a stop.

It happens turning both left and right.

I get a very quick grind sound from my rear end. I am thinking a bearing is going bad on my rear axle.

I've read when a rear-diff fluid change can help this out. I will try that.

If that doesn't work, can I fix this (IE how difficult is this)? Or am I better off taking it to the dealer?
 
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Old Apr 12, 2010 | 06:12 PM
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the noise is sthe limit slip cluthc chattering. when you turn a corner, the two tires have to turn at different speeds. the cluth slips. in a straight line, it dont do it... You need to go to Auto Zone and get a 7 oz bottle of friction modifier and add to the oil.. if your gear lube is original or old, you might want to change it out also. Use 75 w 140 synthetic.. takes 2 quarts i think,,, plus the friction modifier.
 
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Old Apr 14, 2010 | 08:11 PM
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3 quarts of royal purple 75w140 would be best
 
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Old Apr 14, 2010 | 09:43 PM
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my 98 f150 4x4 did the same thing when I first got it. it had the tires and wheels changed from 17's to 16's so I put the 17's back on it and it stopped
 
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Old Apr 14, 2010 | 09:46 PM
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it's the clutch packs. i've tried RP, Amsoil, SynPower all with and without friction modifiers....no luck. will have replaced one of these days.
 
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