short throw shifter

Whats the best short throw shifter to put in a '08 GT with 3.73 gears?

Just installed a Steeda t5/t45 Tri-ax shifter for my 99 Cobra and it's having issues getting into 3rd and fifth gear as well as reverse. We followed the instructions and watched some installation videos to make sure we did everything as we were supposed to. This shifter is supposed to work with...