Drive line vibration

Third post thread today. My D2 2003 TD5 has an annoying vibration when traveling above 80mph. It has been getting worse for the last 4 or 5 years and since about 60,000 miles. Now 115,000. It comes at about 80 and sometimes you seem to be able to drive through it but its always hanging around. Little bit load and even direction sensitive but more speed than anything. Props seem great and of course if I had failing UJs I wouldn't have had it for so many miles and years. I have a feeling it is out of balance props but really do not know. Incidentally, my 300 tdi is the same. I take this Landie to the Alps every year and like to maintain 90 to 100 mph on the Autoroutes Bang on where the vibration is. I'd buy a D3 if I had 30 grand lying around but just can't justify it for the amount of use it gets and it's still a fantastic drive in so many ways. My Cooper S mini would crap all over it in so many ways but for eating mile after mile of motorway and/or climbing a snow covered mountain switchback it's fantastic. Every Discovery I have owned has succumbed to a similar drive line vibration after a few years but I just don't know what to replace to get rid of it. Local Dealer says it's all good but they don't take it up to 100mph. Any ideas? somebody must have got rid of it at some time.

My vibrations (ooo, err) were from a split donut on the rear prop of my 300

tyres,prop doughnut ,bushes

Tyres are new Wranglers. No split in doughnut but rubber may be hard. Bushes in suspension wouldn't quite cause this surely but seem fine anyway.

Hi..i have the exact same vibration at speed over 70 mph on my 1999 discovery V8i..i had been told to replace the cardon front prop..i did and guess what!! the vibration is still there..tried rotating the tyres and had the steering alignment checked...absolutely mind boggling to the mechanics and yes they dont drive above 70mph at my garage either..SO??????? any clues guys...

Are u sure about the wheel balancing? ... try to find a service where they do balancing for higher speeds... the normal wheel balancing equipment turns it up tu max. 70mph... even though it looks like a balancing issue to me

I have the same vibration with my 2001 TD5, Knowbody seems to have a clue what it is, not even the the main stealers. After many problems with the car i.e 2 x steering boxes, watts linkage, air con, injectors, three amigos, compressor, injector loom, hub bearings, the list goes on and on. So in the process of getting a 56 plate disco 3. TD5 is a lovely truck, but time to save money and move on.
Thanks to everyone on the forum who gave me advise over the past 4 years.
Goodbye.

Blimey does a TD5 do 90 to 100 ????????????? never been above 70 and that was downhill with a following wind!!!