My New Holland 3630 started to have problems shifting gears, all the lights were flashing and not going into gear after turning the tractor off and back on again, then it would go into gear. Now it doesn’t go into reverse and it goes forward when I shift gears. It stops and operates as if it wants to back up but does not move.
The first thing is to be absolutely sure that the battery and alternator meet the specifications. Then go through the troubleshooting section of the repair manual if the battery is good and the charging system is in order.