Rythmic Rumble (vibration)

mhjo

Founding Member
Nov 9, 2000
490
0
17
Oslo, Norway
When driving between 50 and 70 mph I get this rythmic (galloping) rumble in the car. The rythm seems to be more or less constant. It is there when acelerating. It reduces when driving down hill.

There is also a slight vibration before shifts (AOD) There is also a certain vibration when reving engine in Park, but this is much less than when driving.

Wheels are balanced
Driveline is balanced

Can someone provide me a check list?
 
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