7.5 differential question?!?!?!?!


Rangerdave73

15+ Year Member

Joined
Apr 18, 2009
Messages
30
Points
3,101
City
Texas
Vehicle Year
1988
Transmission
Manual
what does it mean if the diff. locks up in reverse some times and chatters? I opened the rear end and there isn't any shavings or broken teeth. Is this an adjustment problem or pinion bearings or ????
 
Loose companion-flange/pinion nut

Bad front pinion bearing.

IF you get a funny "chunking" or "chuckling" sound when you engine brake
at highway speed that confirms the problem, but locking up in reverse is
a pretty dire symptom.

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