Case 850K Won't move

Hi i have a 2005 Case 850K series 2. 2700hrs. It started getting finicky last year on me. Machine fires up fine, put the lock levers down, move the joystick forward or back and it blinks F or R. If you sit and screw with it for 5-10 mins it will come out of park and work fine until you shut down and start back up. Also every once and a while you can be tracking along and the machine will just stop and throw you almost out of the seat if you do not have the seat belt on. Currently it is...

Case 850K Won't move

Case 850K Won't move