Today I got the compact solenoid in the mail. I dumped some oil in the gear and transfer. And did the bench test. Worked great. I spent the extra bucks and got the round case with the solenoid, and it looks like I may be able to mount it on the side of the gear case. I will mount the winch before I dissemble it. So I can get an idea of what's going on. Here's some pics of the bench testing and the compact solenoid case.
Bench testing
Compact solenoid in housing
Compact solenoid housing held up against case. I'll see if it will really works in that location once I get it sitting in the frame horns.