Hi all ' have any of you encountered horrific vehicle handling ( uncontrolable steering vibration ) due to either a hole or hump situated in the 1st lane just before northbound parbold exit . This has occurred to me on several occasions most recently 5/3/2013 with a 3.5 ton trailer in tow . But this has happened in different vehicles ( all land rovers ) i have checked all ball joints , steering dampers swivel bearings and all seems fine . Wheels are ballanced correctly , is this just a land rover thing or are there other vehicles out there being affected so violently on this section of the m6 .