Got an 01 dodge with the nv4500 5spd in it. Recently i had to have the new updated 5th gear nut replaced. the other night on the way home from work it lost 5th gear again. Guy i talked to about it said he didnt think the nut should of backed off again since it had the keepers on it or thats what he told me. I was needing some ideas on what mite of happend. Could the nut back off again? Or could it be the spline gear below fifth? Its not makin any grinding noise or rattleing noise when you drive it. And when it went out again it didnt make any noise the motor just reved up. Can you guys help me with this one