mine did the same thing about a week or two after I bought it. 5th just went completely out on me driving down the highway. Drove around on 4 gears for a couple of months then the whole thing started going out. From what Ive read the ax5 sucks and the guy who decided to put it in should be shot and beaten
. Seem stupid to put another ax5 in or do a rebuild. So since I had a ax15 laying around I started that swap and will hopefully finish it this weekend.