My tractor started rolling when in park. I noticed under the cab the roll pin on the transmission lock was missing. I got that fixed then the shifter was stuck in park. If I loosen the clamp holding the cable (under the cab) it will shift out of park, but still rolls. I was told the cable could be stretched, so I was going to adjust it or replace it. Currently the linkage is at the top of the threads on the cable. I tried adjusting it down and it didn't seem to make a difference.
Someone else then told me the roller on the park pawl probably got loose when the roll pin fell out and I would need to go through the floor of the cab open the top of the transmission to get to it. I haven't tried that yet.
I don’t know why it gets stuck in park or rolls.
Can someone help me? I'm not much of a mechanic so step by step details and pictures would be great.