Hopefully this is an easy question for a TR vet to answer. My trans installer didn't reinstall my cat hanger since it was torn almost completely in half. Now I'm trying to decide whether to buy another one or not. Is the cat hanger really needed? If not, does the trans at least need to be shimmed to make up for the missing cat hanger? Will that ~1/4" make that much of a difference to the drivetrain?