I've recently given alot of thought to supercharging my 1997 528i. the only thing that's holding me back is the high milage and the auto tranny. the car has 169K but it runs strong. i just had the head redone and the head gasket replaced so the engine is pretty solid. but the tranny (which was replaced 2 years ago) gives me doubts. can the GM 4-speed handle the boost? has anyone had any experience with this setup? thanks for any info