Alfa 156 wheel bearings, drive shafts or other?
My 156 20v is making a rumbling noise, speed related and relative to the road surface. I have changed both drive shafts now and it is still there. I have tried spinning the wheels and holding the springs and nothing. No play either.
Today I swapped the tyres around and still no change. There is no perceptible change in the noise loading up either side round corners either. I am pretty sure it's the front as I can feel the grumbling on the pedals and to a lesser extent the steering.
Is this front wheel bearings or something else like the diff? It also makes no difference if under acceleration, breaking or coasting.
Logic points to wheel bearings but none of the usual tests indicates so.
Any thoughts gratefully received.