Guys, I've done some more research, and it seems like the E46 3 series guys who have ZF 5 speed autos (ZF5hp19), and are supercharged, have similar problems with the heat like us 6AT (ZF6hp19) guys. From looking at their posts, they installed a temp monitor, and found that our heat exchanger is useless unless the trans temps go over 235F, which is the cooling system normal operating temp. At 242F, the cooling system starts limp mode preparations. In normal street driving the trans temps were hovering around 203-212F (Way too Hot Obviously), so the heat exchanger isn't doing anything. On the track, after a few laps the temp monitor for the trans showed temps hovering around 266F! The cooling system is at the mercy of this influx, of heat, and at 266F trans oil temp, the supercharged 3 series guys would start to go into a trans limp mode, where the car won't allow high rpm upshifts. They all installed trans coolers in their cars, instead of going the larger radiator route. Some links:
Trans Temp data post #4:
http://forum.e46fanatics.com/showthr...mission+cooler
Trans cooler install with pics on supercharged car:
http://forum.e46fanatics.com/showthr...mission+cooler
Trans cooler Temp data on supercharged car
http://www.vsetrack.com/secondary_trans_cooler.htm