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1999 Ford F-150 rear end clunk

Tiny
MUDDIGER
  • MEMBER
  • 1999 FORD F-150
  • V8
  • 4WD
  • AUTOMATIC
  • 165,000 MILES
My rear in cluncks when it is put in reverse and if you shake it it side to side it makes a clunkinn sound I replaced the front seal on the front of the rear end and it dont leak but you can move the drive shaft up and down were it meets the rear end any ideal what could be wrong and how to fix this problem ps I have replaced the u joints as well
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Tuesday, September 14th, 2010 AT 4:44 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,254 POSTS
If you have play at the shaft going into the differential, the pinion bearing is bad.
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Tuesday, September 14th, 2010 AT 8:41 PM
Tiny
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  • MEMBER
  • 6 POSTS
Well that make it clunck when im off roading as well
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Wednesday, September 15th, 2010 AT 5:50 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Yes.
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Thursday, September 16th, 2010 AT 7:26 AM

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