hi has anyone else encountered tramlining or a tendancy to wander when driven on country lanes or uneven surfaces my d2 td5 has 18" wheels with goodyear 255/55-18 tyres my local landy specalist has recommended changing all 4 tyres to grabber at's however i would appreciate some advice from someone who isn't trying to relieve me of £600 it has only just passed m o t and i have checked suspension and there is no obvious play i am also thinking of converting to coil springs all round and lowering it 2.5" to meet my needs {towing and family transport rather than crossing sahara}