Well guys had rims and tyres re balanced for a 4th time still no difference had a mate come over with his Sri astra I swapped wheels and BINGO problem solvered.....so the new wheels that were put on have made the steering shake from day one the 2 front tyres had worn badly while back ones were fine....so there is definitely a problem with the wheels now to try and get something done about it as the tyre shop have known about the problem from day 1....