I have a 1941 9N with something locked up. Tractor was overhauled by my brother about 15 years ago and last started 12 years ago. Last year I decided to resurrect it. Engine was set so trans fluid in jugs and rocking it in 3rd loosened it. Has spark and fuel but won't start with starter. Pulled it from storage a couple months ago to pull start it. Now will not turn engine over when pulled. Wheels run opposite directions. Engine still turns over with starter. Rolls fine in neutral or with clutch out. Have rocked it in all gears with PTO in and out. Filled trans with trans fluid and diesel. Was stored indoors and found a few oz. of water when drain plug removed. Has sat for a month with occasional rocking and no visible change. Thinking to remove trans cover but appears to be quite a job and I won't know what to look for when I do get in there. Certainly no enthusiasm to split and remove trans. Sorry for the epistle but wanted as much covered as possible. Any suggestions or comments would be greatly appreciated. Thanks, Tom