Motor, tranny, or what ?

[Ray-F250]

hey felas so I tried pulling my tractor today and my truck barely could make it up the smallest of hills blowing black smoke rpms at 2500 and couldn’t break 35 mph what is wrong with her now

 

[Ray-F250]

Oh yeah and she wasn’t shifting correctly either never would shift to 3 rd it seemed

 

[Ray-F250]

Oh yeah and she wasn’t shifting correctly either never would shift to 3 rd it seemed