been around 420a's for a long while. been on this site for a long while as well. I don't post alot unless I have a really good question. The title says it all. The motor'll handle it, just curious about the tranny. I've done the most I can w/ the a604. Tranny temp gauge, 4 or 6 pass cooler (can't remember), relatively new a604. It's a 99 model so I know it's the most recent design. I'll never do more than 9 psi on first gear, but when it shifts to second, will it handle 16 or more? 20? Want to know some of the senior 2gnt'ers opinions on this. I'm slowly getting parts for a manual swap, but I need advice. money is tight so don't suggest to swap yet. Tell me about what the a604 can do for ME. lol Thanks :)