I guess this should have been called "info from DD2 users with automatics"??
Having just joined the ranks of DD2 users last Saturday, I can't tell you much about the autos. I have a 6-speed that is (amazingly) holding the power with no clutch upgrade. I have my EZ set on extra tame.
If I were an auto guy, i would get the TC/VB done FIRST, even if i never planned to bump up the power. The factory setup slips WAY too much, and torches ATF quickly and easily. This slippage makes your torque converting good at one thing only "converting" TORQUE INTO HEAT!
LSMITH is right on here. Doing the upgrade now, will the trans is still healthy will make final setup cheaper and easier. It's the difference between stitches and chemotherapy. I'll take the stitches. Once you get the TC/VB done, IF you should someday want the FULL rebuild from (insert vendor), you can keep the parts you already bought and the rebuild will be cheaper. Also, you can go longer before you need a rebuild, because you fixed the bad parts that were causing most of your trans wear!! HEAT is the biggest enemy of an automatic-- BY FAR. Lose that "heat generator" that Dodge calls a torque converter and you will drastically cut heat, get more power to the ground, get better mileage, and let your trans last longer. An extra-deep pan is a nice band-aid, but won't fix the cause. If you get rid of the source of heat, then you won't NEED a huge pan that doubles the cost of ATF changes!! This stick shifter would recommend an 89% TC.
I have put the biggest transmission cooler i could find on all my autos. They last me a long time. I have 100K and lots of bracket racing on my maxima auto, and it's still very tight.
HOHN