727 TC Installed - Probably Wrong...

another possible cause (this is assuming you DID seat the TC) is that one or more of the TC bolts were never tightened enough - - it only takes one.
Omg i did the same thing I tightened up 3 and left one little looser than the rest and it got caught on one of the main supports in between the motor and the transmission. I had to physically unbolt the motor from the transmission to separate them to remove the bolts and started over