A833 leaks

FYI;
I cut my H-pipe out to fit a GVod. That enabled me to take my aluminum-cased trans down in 17 minutes, on a 4-post drive-on lift ............ back when I was in my mid 50s, lol.(I'm 72 now)
I gotta tell you tho, I lost a significant amount of low-rpm torque, below 2000rpm. After spending a few hours on the tune looking for it, I gave up.
My final solution was a lower first gear, 3.09 versus 2.66. Problem solved.