parked the truck last night with everything working find, come out this morning to run to town and no 4th gear? shifts fine till 4th and nothing there, just revs. Also everynow and then under easy acceleration it feels like it grabs, lets loose, grabs and goes shifting from 2 to 3rd. Is the tranny finally done and need to rebuild or is it computer problems? I have a ATS converter and ValveBody with co pilot. Lately when using the exhaust brake with the copilot on 4th the brake would hold and slow the truck down, then when shifting to third it would kick off and on until i turned the brake off. Any ideas? Wes

 

Have you checked all of your fuses? Just a thought. I had something like that on my old F250 and it ended up being the shift solenoid.

 

done some more research and pulled a P1740 code. Wes

 

P1740(Torque Converter Clutch Inductive Signature Malfunction)

Hope this helps