Rob Woolliss

Hi just joined hoping for some vital information, my car a 2 litre impreza automatic is acting rather wierd ! we have only just bought it and have now noticed a juddering when reversing or turning corners ive taken it to a garage who know the cars got this problem its been up on the lift all day with a mechanic of 30 years standing checking out all the usual problems, bushes, drive shafts ,ect, but can find no reason for the cars juddering problem, has anyone else out there experienced such a problem and may know of a possible cure? any help would be much appreciated cheers, Rob.