1999 f250 7.3 powerstroke not shifting in drive but will shift into 1st and 2nd manually

[Owen]

Hey so I'm having a hard time figuring out why my 7.3 only stays in first in drive but won't shift out of that but I can manually put it in 2nd just fine its the 4r100

[Don Ridley]

Post your question on this Ford truck forum:
https://www.ford-trucks.com/forums/index.php

There are transmission experts there that can help.