My 2003 TD5 defender 90 has started vibrating/shaking when accelerating... I can let off the throttle and it disappears and can even drive with a light foot and its fine... start to accelerate or push it up a hill it starts to shake.... also some metal clink/clanking noise... but I know I have a rear strut mount gone and getting some noise there, but sounds like similar noises coming from up front.

Check the propshafts