I came across this page this morning while searching the net for upgrades on the A604. This site seems to have a lot of upgrades, though I am not sure, maybe someone can verify these uprgrades for future insight for us A/T guys.

http://www.transmissionspecialty.com/parts/HTM-Part-Pages/Chrysler.htm


*rebuild in process*
GST Muffler
injen short ram intake
magnecore 8.5mm wires
EGR removal/blockoff
front/rear strut tower bars
GSX dual piston calipers

bump, I also found a site wit A604 codes and problems, how to diagnose etc...

http://www.robskorner.freehomepage.com/faqs/Trans/A604codes.html


*rebuild in process*
GST Muffler
injen short ram intake
magnecore 8.5mm wires
EGR removal/blockoff
front/rear strut tower bars
GSX dual piston calipers

thats cool bro thnx for the links...
there are many other upgrades u can do tho..... as long as your in the tranny that is..... and 90% of those internal parts are in a master rebuild kit produced by a company called Cal-Transmission.

good looking out tho
jake