904 Valve Body

64ValiantConv said
I'm no expert but this could have many other causes than the valve body. A bad seal on the 2-3 clutch apply piston? Worn clutch plates? Worn band? Weak 2-3 solenoid?

Me thinks you'll have to tear it down to find out. You seem to have all but eliminated the valve body as the source of the problem.

Thanks for the ideas but this trans is all brand new inside as it has been gone thru and seals replaced four times in the last five years. Thats the frustrating part.