These days its like one problem after another


The citroen estate has just started to rumble/grumble/vibration from the front (more to the off side) when im in gear and moving forward at around 1200-1400rpm, At other speeds it is fine.
So i suspect the gear box and the wheel bearing is ok, so was wondering if its the O/S drive shaft but its strange it only occurrs in the rpm range of 1200-1400??????????????
Any help greatly appriciated.


