If you are having this in FIRST, then you need to check for slop in the shift cables.. under the shift boot look at the bushings.. then at the shift tower on the engine check there.. also in the middle (under the car where the shift cables leave the interior on the way to the engine) there is a joint.. check that too.. MY car had a TERRIBLE 1st gear grind.. would pop out of gear etc.. that was the problem was misaligned cables..