Land Rover Repair: discovery vibration, td5, axles

Question
help 2000 td5 i have a vibration coming through the body of vehicle this happens at 65 and clears at 75 wheels have been balanced and rear prop and uj has been changed thanks

Answer
You took the first, easy, step.  Now it gets harder.  First I would look really carefully to see if anything is loose.  Then I'd run the vehicle with the axles supported but on a lift, and I'd watch to see what shakes.  You have to be really careful doing that because it's dangerous, but it may be the only way to find the shake.  Another suggestion is to run 70 on the highway and have another observer car alongside . . . sometimes you can see a particular wheel shaking at speed in that manner