The previous owner of my mazdaspeed protege installed the MFactory 4.687 Final Drive Ring and Pinion gears. I know that because I used the mfactory transmission calculator along with my observations from driving the car and the values match up with stock transmission ratios mated to a 4.687 final drive. My question is how do i go back to stock? Do I need to just get my hands on a stock ring gear or do i need the pinion as well? Also i read that you can't separate the ring gear from the LSD and if that is true then i need a whole new LSD right? Any help would be appreciated.