help needed with 904

I'm with AJ on this........ I tore my valve body apart yesterday because my car had hardly any reverse when cold, and sure enough, one of my check balls (#4 to be exact) apparently didn't get put back in when I did my shift kit..... Pull the valve body, do an air check on the trans to check for leaky seals and band and clutch operation, and take the valve body apart, just to be sure nothing is missing!!!!!