I need advise Quattro brethren: I was thinking about changing the trans fluid on both my audis with synthetic, My 90 is an auto, my Coupe Q is a manual. someone told me once that syn would put more load on my synchros? really? I just want my trans to last forever, so if you have some advise, let me know! Christian J Long 1990 90 1990 Coupe Q