GU II ute 90K/hr vibration

Hi I have a 03 series 3 GU running Cooper XTs on standard alloys and had them rotated, balanced but at 105 Klms they vibrate.
Also I have also spoke to other Patrol owners,they also have a problem with pulling to the left which mine does, if someone has a remedy it would be great.
Cheers.

I have heard that in some cases it can be a dodgy engine mount, left hand side, I think. Another one can be the tyre tread not on straight, however there are other many and varied issues with the patrols.