Resonance from rear at 60 mph

mhjo

NAXJA Forum User
Location
Norway
I get a deep bass resonance from the rear that propagates into the chassis when I drive around 60 mph.
It almost goes away when I reach 70 mph. It also reduces if I put the transfer case into 4wd fulltime.
It is most noticeable during acceleration.

FYI: I have had the wheels balanced, rims checked, drive shaft checked, new engine mounts and transmission mounts..

I really want to solve this since it is the only issue with the car.
 
That kind of suggests pinion bearings.
 
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