i fixed the vacuum leak and that fixed the hvac problem, its so nice to have the ac in my face now lol. i have not tried a different tcu, and i also dont know my line pressure, a thought just came to mind though, when i installed my trans cooler i didnt bipass the stock one just pretty much tied in to it im thinking i should eliminate it altogether so it just uses the new cooler and radiator, maybe its causing some kind of restriction?
so it should go (trans - radiator - cooler - back to trans) correct.