Allison 4 speed

I need to get in touch with someone who is able to educate me in regards to allison's 4 speed auto. I have a Heavy duty project that needs manual conrtol of gear selection. I hope some of our members can help.
Thanks Guys!
Perry

here is some info on the allison tran

http://www.rvusa.com/forum/mbbs22/forums/thread-view.asp?tid=1558&start=1

http://advanceadapters.com/resources/978/Allison1000.html