[AT] AC WD45 Tranny question

[Al Walker]

Hi all,
The shifting on my WD45 has been sloppy for years. Right now, I have it 
in 1st gear and can not shift it out. I suspect the shift lever may have 
come out of position.  Is this likely to be in the tranny itself, or 
could it be "just" the shift tower assembly? Is there a kit, or 
recommended group of parts, to re-build such a shift tower?  Sorry, only 
have operators manual, no parts or service manuals yet. Recommendations 
for these manuals?  Thanks in advance.
Al in sunny NW MN.