so yesterday i went to have my car protuned. the car shook pretty violently and assumed the center diff was on its way out. i bought the car a few years ago with an sti 6 speed transmission and need help finding out the year of it so that i can fix my center diff problem. the cv axles are green and and the inner part that connects to the trans is female. there is no dccd unless it is not wired up. thanks.