300 TDI Disco shudders bad at 70mph

Hi all, not long owned my disco and love driving it until I get to 70 mph and feels as is body's gonna shake off the chassis, has anyone ever had this issue before? if so how to resolve? been told swivel shims, steering ball, track rod ends, suspension, brakes i know are all ok as renewed all round. Cheers Al.

body mounts

Not lost a tyre balance weight have you?

Also check prop shaft UJs as well.

steering damper?