Doesn't sound like a TQ converter problem at all, sounds like a burned up 3rd and/or 4th gear clutch pack. If the converter were toast, you'd not build pressure and not move much at all in any gear.
http://www.bnmotorsports.com
"And I will strike down upon thee with great vengeance and furious anger those who attempt to poison and destroy my CEG brothers. And you will know I am the Moderator when I lay my vengeance upon you."
