My 93 has the same problem and this is one problem that has existed since first owning the vehicle. I, long ago, read of some bulletin that basically said that this problem was due to a mis-match of some gear and that it would require a change of that gear in order to mesh correctly. I was never able to get the detailed hard info, i.e. paper, from any source, but there were quite a few listed problems that seemed to indicate a number design problems that needed attention. I had gotten the list of defects that listed these campaign problems from a library source that had compiled such auto related problem info. I still have the printout somewhere. My list did not go into great depth for each problem as it only listed these problems. Again, this was info from many years ago, yet this one problem stuck in my mind as it was very apparent from day one....
Maybe someone who is Saturn experienced with the history of the 93's campaign bulletins can add, or shed, some additional info