After a trans rebuild I cant get oil to the top end. None in the filter either. I thought I checked everything when i put the cases back together. Oil pump was new in august and seemed fine. Changed the spring and ball and seat in the clutch cover too. What did I miss. Gears were aligned on the clutch and oil pump gear also. This seems common on rebuilds but this is the 2nd time I have rebuilt it and I am missing something. I only let it run about 10-15 seconds. That should have been enough.