Two likely candidates for clunking or thumping from the rear of the cehicle.
- the centre/front one of the three rear diff mounts.
- the VCU mounts
You can test these by getting under the vehicle, have a goiod buitchers and look for deteriorating rubber. A little bit of surface cracking is ok, but my rear diff mount had disintergrated completely. Then, whilst you are down there, grasp the propshaft and give it a good waggle up and down, side to side and see if you can witness it fouling. Also see if tou can get it to turn, and check for play ta the univeral joints.
For advice on changing the mounts, go to www.landyzone.co.uk
and search the Freelander forum. You can also get the technical "RAVE" discs from www.green-oval.co.uk
or com. Can't remember.