back in the day they would boost line pressure with a part, this was pretty common on the earlier units.
I haven't heard of a pump dying due to line pressure being boosted, but who knows.
These days you can do it via a tune, and what I did was to just boost the pressure by a few percent in the clutch pressure settings.
Pretty much I didn't like how 2-3 shifted, so I would boost that until I was happy.
I also played around lightly with the oncoming pressures to help speed up apply and remove the delay and a slight slip that was present.
Do i know what I'm doing?
nope!!
With my fresh transmission with good clutch pack clearances, I didn't need much to make me happy.
I'm pretty much on a stock tune at this point, I think I have 1-4% pressure boost in some gears.
but mostly I have that since the tune was for a 5.3, and I'm no longer running a 5.3.