03 Rancher ES shifts but display shows –

New battery last fall fall, display reads N when started and shows – when shifted to 1st but goes into 1st gear. It will not shift back down to N without shifting up to 2nd after that I can shift back down to 1st which again shows – on display then into N or R. All gears work but display only displays R N – 2 – 4 5 occasionally when shifting down from 4th 3 will show on display. I have tried wiggling connections on angle sensor and the wires on the gear position connector along with checking them for corrosion all were nice and clean including the thumb switch and the wires going into the back of digital display. None of this made any difference. I also adjusted the clutch, again made no difference. ANybody have any suggestions what the problem could be? I have searched all over and have not found any other problems with this issue. At times with the atv not running, key on shifting to 1 with ES will show 1 on display and other times it only shows – and if it shows 1 on display when not running and I start it and try it it only reads –