Help ! Can I remove the trans, but not the converter ?

Stand the motor on the front pulley when re-installing. Set the trans on the motor tail up. If it doesn't go on all the way. Give it a couple of good hits with a sledge hammer on the rear of the trans until seated. This is quick and effective.

I use this method on everything. I have three drawers in my tool box. Hammers, Prybars, and Vise-grips. My theory is why hinder the process with Ratchets and wrenches.