During normal driving I have no problems with the steering. No hint of vibration over a range of speeds. Very slight steering wheel play whilst stationery.
However, I clipped a sunken drain with the NSF wheel doing about 50mph and the subsequent vibration or wobble was quite alarming!! I eased off the accelerator, allowed the car to slow down and eventually at around 20mph all was back to normal. Driving thereafter was normal. Some days later ( and about 60 miles covered) and exactly the same thing happened.
Anyone point me in the right direction of what to check?