Are the two bolts on the underside of the car that secure the shifter mechanism to its mounting bracket suppose to be tight, or left a little loose so the shifter can slide with the engine as it moves around in response to torque? The reason I am asking is I hear some creaking noise from the shifter when I start out from a stop, either forward or in reverse. I disassembled the shifter and re-greased it during my clutch job; did not see anything wrong but maybe I missed something.