Hey wes, is that new nut the split nut with the 1\4 bolt in it? If it is, it is not the right fix, the earlier nut with no split is. My 99 gear box with 40,000 mi had that split nut and it was loose. Do the tdrammbr fix and you will be good. Very poor design on 5th gear. Good luck, I have part numbers if you need them. Tim