hello steve
yes after speaking with some half tracks owners it appear that sometimes there is trouble with reverse gears in gearbox
i found idler reverse gear and shaft,brushing etc...very easily(from a good dealer),but reverse gear is rare.
i have an offer for this gear,new manufacture ,very very good quality at $500.I don't say that the dealer sell it more than value,because it's expensive to made this gear in machining,only thing i say ,it's to expensive for me.
i found an other solution here.
so normally now it's ok
now i am looking for infos about rear storage rack for M3 half track
willy