Deutz M620 drive problem

[Mixedupfarmer]

Got a problem with the drive on deutz M620. Start the tractor, and put in any gear, the tractor moves 2-3 meters, then stops, with the M on the cab pillar display moving to N (neutral), and a bleeping that appears to come from the pillar. No error codes on the dash, can't see anything wrong. Dip the clutch or shuttle, and repeat, and it will move 2-3 meters again. Any ideas?

 

[Yale]

We have a m620 but never had that. Is it linked to perhaps a speed sensor somewhere if it happens consistently when moved?

 

[Mixedupfarmer]

We have a m620 but never had that. Is it linked to perhaps a speed sensor somewhere if it happens consistently when moved?

Could be, thought it might have put an error code on dash though.