32RH transmission slipping between gears

Go hit up your local transmission shops, you might have to buy the while valve body but it gets you back on the road.
 
That must be why why they switched to some kind of a synthetic material for the check balls in the 42RLE.
Give Joe at Westminster Transmission a call at (714) 898-0089. He is the absolute guru of Jeep automatic transmissions and may have some good suggestions on where to get that plate or at least some ideas. He also preps some of the transmissions in King of the Hammers race vehicles, he knows what he is doing and he know the 32RH inside and out.