Warn 2500 Grizzly 450

[Vertigo]

My non-running '08 450 hour 1450 mile 450 grizzly investment paid off! I paid a buck per cc...yup, $450.
It smoked mosquito-fogger bad, was missing starter solenoid, a fuse, racks and a few small plastics, needed a rear ujoint, a brake caliper and lever. Popped in the fuse, plugged in starter solenoid and a carb clean out came next.  After an oil change, seafoam treatment, and reseating rings by very hard and hot riding towing a 5' disc for two hours, it completely stopped it's bad habit! Changed oil and filter again (went synthetic), and have put a hundred hours of trail-busting and mountain climbing, everything is working perfectly, and not using any oil.

My current task is to repair the winch, if possible. It was crammed jam-packed full of dust, rust, and mud.
I disassembled it, cleaned it completely, found nothing overtly appearing broken, but it feels like the knob for freewheel/engage is "sticky".
I mean, REALLY sticky-the Mitsubishoid rhombus-triad looking mechanism appears to not release, unless I pull or tap on it.
I've not yet reassembled it, want to find out if the disengage action is normally this "sticky".

Anyone have experience with this? How about a schematic, or manual?