75 Mercury 4.5 transmission?

May 25, 2015
176
Macgregor, Hunter Venture 21, H25 Candlewood
So I did the usual impeller replacement, but some how got the shifter out of synch?
I can only get forward and neutral, no reverse.
Any tricks to get this lined up. The issue is at the transmission side, I can shift it with the lower unit out, just no reverse.