Just had track rod end ball joint fitted to the rear left side. Thought this was the problem because there was play in the wheel. but the vibration is still there. every time I take off with a bit of power The vibration is very distinct, can feel it coming up through the centre console lid when my arm is resting on it. This is starting to worry me know. Prop shaft?

have you had the prop bearing checked for play,this is a common problem on the 300

rear gearbox mounts can go also

Thanks fellas, back to the garage to check it out, Having the gearbox dropped soon anyway to fix an oil leak so i'll have it checked then.