I'd bet a six pack that there is no problem with the tractor drivetrain. Hydro tractors, even 30-35hp ones loose alot of speed going uphill...... You have to ease out of the pedal and let it catch up.
Video please. Also in the video please include you challenging the trans... In other words.. Put in 4x4 when in loose dirt and ease bucket against a tree or in a pile of dirt... Full throttle low range give it some pedal and see what happens..
Video please. Also in the video please include you challenging the trans... In other words.. Put in 4x4 when in loose dirt and ease bucket against a tree or in a pile of dirt... Full throttle low range give it some pedal and see what happens..