Differential noise or center support?
Just noticed a new noise. Basic description would sound like a snow tire on a bent rim but only starts at 20mph and more so on deceleration. Can hear it more after it warms up, not loud, faint but there.
I thought it was the differential but the fluid is perfectly clear with no metal at all. I swapped this into the new ride and had to replace the input flange and fresh fluid. At the time the pinion did have a slight unhappy bearing feel to it. Drove it 5000 miles since in city and on several long highway trips (+500 miles) and no issues. I still worry.
This car always did have a driveshaft imbalance type vibration which mostly went away with the 3:64. I would guess differential bearing but it is not constant IE the description of snow tire on bent rim. It's like a howling that warbles... wu wu wu wu wu real fast. I doubt the wheel bearings or cv joints, this noise is too fast.
If it was the differential I would guess it wouldn't warble and be more constant. At the present time I am unable to do more trouble shooting due to all my stuff is still holding my sons car in the air.
I am also thinking a tire since these are about half way done but to notice it this sudden makes me wonder.
Been searching all day and come to the next question I just can't find an answer to:
Is it possible for a center support bearing to make this type of noise?
95 E34 530I V2.37
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