I've got my 727 out and apart. We're going to start putting it back together tomorrow and I'm looking for solutions to the "morning sickness" problem these transmissions have (i.e. they won't go in gear unless allowed to idle in RNDL for 30 sec, P won't work). This one has had it pretty bad too. All I have to do is let it sit overnight and it won't go in gear right away.

I did a search and so far I've seen:
1) Bad converter (getting a new one from TurboAction anyway)
2) "Converter drain back valve" on the "top of the valve body" has some crud in it" (I cleaned the VB myself a few years ago and didn't see anything)
3) Pump bearing clearance is too loose

Anything else we should check for that might cause this?

The pump itself looks to be in great condition but we will double check the tolerances before we put it back together of course.

Thanks!