Transmission is over heating
Serial number. Fault codes.
Verify
BYN00443, no codes, transmission intermittingly flashing.
I wasn't aware transmissions could flash. Do you mean a warning light by any chance.? If so which one.? Post a photo if it is any easier. Does the machine have a transmission temperature gauge.? What does that show and under what operating conditions.? If there is a gauge and it is reading high has the transmission temperature been confirmed using an infra red temp gun.?
The transmission filter light flashes and the transmission temp guage go into the red. Moving and pushing dirt in second gear.
If you stop does it immediately cool down or does it cool down while pushing? Have you confirmed temperatures with a heat gun? What does your oil look like?