Th400 won't budge after engine rebuild

[FirstOwner69]

Originally Posted by Mrturner1

WELL......took the pan off and filter off, removed the new extended filter pickup and read on one end "pickup" and the other end "filter"....I had it backwards and bolted the filter to the valve body which doesn't work with a longer tube. Im putting it back together now so we'll see

Hopefully this will (or did) fix your problem. It sounds like the converter isn't filling with trans fluid. Be sure to check the fluid level several times after you make your "repair" and run the trans through the gears with the engine running as mentioned above. The convertor will probably take a few more quarts to fill once the fluid starts pumping.