My sons Corsa Merit 1.1 (petrol) has a thump from the floor when he changes gear - he`s a bit heavy footed. Yesterday whilst it was up on a lift having the tracking aligned, I asked the fitter to shine his lamp on the rear engine stabiliser. I could see that the upper part of the rubber has been touching the floorpan, and that the whole thing seemed rather soft and easily moved about. Does anyone know how much movement there should normally be in this rubber mounting? Ron(UK)