"COMPLETE UPGRADED VALVE BODY" "SONNAX VALVES FOR HIGHER LINE PRESSURE"
I'd say that's your answer right there..I'm willing to bet with that "upgraded"
They have the line pressure jacked up wayyy too high..
It might make it harder to accurately check the line pressure if there's broken bits in the transmission again..
That's where I would start though..
Note: All pressure tap locations are clearly MARKED right on the case on AODE's & 4R70W's.
Main Line Pressure
In P/N, OD, D/2, 1 @ Idle Hot - 50 to 75 psi
In P/N, OD, D/2, 1 @ Stall Hot - 160 to 210 psi
In Reverse @ Idle Hot - 80 to 120 psi
In Reverse @ Stall Hot - 220 to 280 psi
In P/N, Rev., OD, D/2, 1 @ Idle Hot - 0 to 9 psi psi
In P/N, Rev., OD, D/2, 1 @ Stall Hot - 83 to 93 psi
Note You can check for leaks in the Clutch/Band circuits by comparing them to Main Line Pressure. They should be within 10 psi of each other.
How To Check It
Install pressure gauge in line pressure tap.
Install a 2nd gauge in the clutch tap that you want to check.
Clutch/Band pressure should be within 10 psi of line pressure when the clutch is applied
In P/N, OD, D/2, 1 @ Stall Hot - 160 to 210 psi..This one's important..Do not exceed 220 psi!
If you're not familiar with the inner workings of the valve body, and line pressure is way too high..
It might just be easier for you to find a stock unmodified valve body..Then install that..That is of course if the transmission hasn't sharded itself already..
Good Luck Man!