On the way home from crosshills as I hit about 40 on the first stretch of road leaving the gate I got nearly uncontrolable vibration and shaking through the stearing wheel, only thing I could do was slow down gently and it disappeared at about 20 mph.
Tried the following
Stopped at nearest garage and inflated all tyres to 32 psi
Check all steering linkages (and tightened a few lock nuts on the heavy duty steering rods.
I had during the event fitted a spare I have never used before so immediatly thought its not ballenced but the problem does not seem to be speed related, can happen at 30 but on a smooth road 50mph was fine, it was generaly set off by a rough road surface.
I can confirm the pannard rod bush is Knackered and has a lot of play, and also the vehicle pulls to the left under braking.
And suggestions to help me get this sorted would be appreciated