I have a defender 90, I have fitted heavy duty track rods,new track rod ends,new steering drop arm ,new steering damper,wheels are balanced and tracked but I am still getting a serious wobble with major vibration coming through the steering wheel when I accelerate up to 30-40 mph.It feels like the wheels are wobbling as if they are ready to come off.Oh and I have checked that the wheel nuts are tight.Any advice please.. Duncan