After days of searching I can’t find a specific answer to my problem. While not running I can shift smooth through all the gears. Even after I start it. I out it in first and take off and can’t get it to shift unless I slow way down then it will shift. But a little jerky. I have adjusted the clutch to 1/4 turn out from slightly seated. No change. If I hold up on the shift lever it stays in gear so I am assuming the shift plates are stuck together. It has sat up for a while. I changed the oil today( 10w40) and front and rear diff oil( all looked great) but at least it’s done. I read where I can add a little marvel mystery oil and that will help free them, so I’ve done that. So I guess now I just need to ride the mess out of it and see it it will free up? I tried holding the brakes and giving it throttle with no luck. Does this sound like just plates issue to you guys or something more?