Hey Barry, I have a 84 633 with an auto tranny. What ever you do make sure you have the tranny checked out. The ZF 4HP22 is notorious for frying during emission testing or a/c refridgerant filling.One way to tell if the trans is going south is put the trans in nuetral while running at idle see if the car creeps on level ground. Mine blew 2 days after purchasing. Good Luck Robin F. : Looking into buying an 84' 633csi auto. What should I look for? Any help would be great. This will be my first e24 purchase. Thanks.