Simple way to smooth out a rough shift.
This will work on all EARLY 8000 series John Deere tractors (black stripe decal) unless you have major transmission issues. For a simple walk though on how to calibrate the transmission on all 8000, 8010, 8020, series tractors I'll post a link below. This video goes through the process more in detail and is more for tractors that are experiencing issues.

   • John Deere 8300 Transmission Calibration  

Here is also a link on how to diagnose why your tractor doesn't go out of park at an idle.

   • JD 8300 Park Brake Issue PCU 29