I got this car a few months ago. Was informed of a transmission leak, so i continually checked the transmission fluid and added as needed. The reverse worked at first pretty fine, and then i went to reverse to back out of a driveway, and i had to rev it a bit more then usual and it seemed to hesitate, and then a few days later I tried to reverse and it wouldn't move, there were no sounds other then the engine revving and nothing happening. Do I need to replace the whole transmission or what?