Part-time high school kid was out with the 1370 last night putting out bales for the cows and claims he was jumping out to tear the twines off the bales and threw the transmission in park and it kept rolling.  When I checked it out all the drive gears and power shift gears engage correctly and drives fine, but there is no resistance at all when engaging the gear shift into park can't even feel anything engaging.  He is a really good kid, but I'm guessing he threw it in park while it was still rolling and something broke or sheared.  Any ideas where to start or what would cause this?  Thanks.

Eddie