1999 Ford F150 rear end clunk

1999 FORD F-150
165,000 MILES • V8 • 4WD • AUTOMATIC
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MUDDIGER
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  • 6 POSTS
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
Sep 14, 2010 at 4:44 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
If you have play at the shaft going into the differential, the pinion bearing is bad.
Sep 14, 2010 at 8:41 PM
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MUDDIGER
  • MEMBER
  • 6 POSTS
well that make it clunck when im off roading as well
Sep 15, 2010 at 5:50 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Yes.
Sep 16, 2010 at 7:26 AM
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