Trying to hook up speedo cable in the 57 bird to newly installed t-5, I am using my speedo gear from the original auto tranny, I can't get the gear assembly to fully seat it stops about 3/8" from fully seating. Without the gear it will fully seat, I have tried removing part of the nub at end of gear and doesn't improve the situation any. It does however fully seat with no gear. I ma suspecting the gear teeth don't mesh, I have tried slightly turning gear at each attempt as well. Any ideas? It is a 91 world class t5 for mustang.