TH400 pressure

[Nosman]

Hutch, thanks for the help earlier with the Griner brake apply issues, seemed to work good. The problem I'm having now appears to be pressure related possibly. Quick info on the car, 3550 lbs, approx 900 hp on spray BBC. When I grab high gear there seems to be very little initial rpm drop, and then after 1-2 seconds it drops a little further and you can feel the car bear down and pull, it runs about 140-142 mph. It started doing it in 2nd gear as well this weekend. We are going to put a pressure gauge on it to see where we are, but what would you like to see pressure wise with this thing, 200 or so? Fluid looks and smells good and it shifts great until I put more pill to it.
Just a little more info, Trans Specialties spragless converter, flashes 5700 or so on spray, Griner brake, Raybestos blues in fwd, direct and int.
Thanks in advance, Rick

[Hutch]

I like to keep them between 185 and 200 psi. Anything above that generates problems for me.

The problem your having sounds more like ,when you shift your running back onto stall speed at the shift when on the nitrous and this is making it fe3l as though the trans is slipping.

Let me know what you see.
Take care ,Hutch