hey hope I'm doing this right
my f550 v10 acts like fuel pump weak but replaced pump and filter same
trans codes so I unplugged trans runs fine so I replaced trans with jasper rebuild same issue any suggestions

 

Welcome to the site..

What were/are the codes stored?

Also, any time you suspect a pump or fuel starvation, it's a good practice to put a test gauge on the fuel rail and monitors fuel pressure and test for volume prior to a replacement.