727 Problem

We fixed the problem by putting a standard valve body in and it now works properly. The transgo kit gave a different shift piston so we think that this may be incorrect for my valve body. Down the track we will put the standard shift piston back in the valve body and put that valve body back in to see if this works. Have any of you guys had this issue with a trango kit installed before?
I’ve never had that problem. Did u adjust the new manual valve? Kim