Not really sure what model the mill is but from what I've read it is a
2J head.
The problem is the backgear won't engage. The mill seems to run fine in
high but won't switch back to neutral or low. I know I'll probably have
to disassemble to top part of the machine to find out why but I wanted
to ask if anyone has any info on this problem or advice for what parts
I need to remove to gain access to the backgear.

Thanks,

Steve