Transgo TF2 on a 904 is not shifting

If ur tranny is lock up u cannot use a non lock up converter Unless u changed the input shaft and assorted pieces. Does the input shaft have splines to the end? A lock up doesn’t have splines to the end. About 3/4 inch from the end is also smaller. Kim

How to disable the lockup feature on a lockup A-904 or A-727 - Slant Six Forum
I did this on mine