I have a rebuilt mack 10 speed (multi speed reverse in a 2000 RD Dump. It’s got less than 200 miles on the rebuilt trans but it continues to trouble shifting between hi and low range as well as now all of a sudden it will randomly pop out of gear in hi range while the stick never moves. (It seems like it goes into neutral range.) even though I don’t touch anything. Is there anything outside the transmission that could be causing or did I a get a shotty rebuild? Can the shifter knob assembly have anything to do with it? Or maybe air line problems. Any suggestions would be greatly appreciated.
