I have a actron obd 2 scanner would that work

 

Dont know if it helps but my 01 5.9 wouldn't shift out of 1st because the cylinder head was cracked. Had my engine replaced because cylinder 5 exhaust valve cracked so figured it'd be better to just swap instead of spending money on the old engine. Had a warranty with the new engine so I didn't have to pay anything when the cylinder head gave out. My code was different though was just a cylinder 8 misfire because the cracked was right in between the cylinder.

 

Maybe, plug it in, and scroll thru the data that's available.

 

What would I be looking for exactly.

 

Governor pressure. OR something along those lines.

 

I have these codes after I unplugged the 8 pin connector and test drove it I have the connector plugged in now.
p1763 governor pressure sensor high
P0713 transmission temperature sensor high
P0753 3-4 shift solenoid/transmission relay circuits

 

Those are the same codes mine throws with that unplugged. How did it drive with that unplugged?

 

With it unplugged I got it to shift from first to second but the idle was kinda kinda rough

 

Wonder if you have more than one problem.

Clear codes, plug the trans back in, see what happens. It seems you have an electronics problem though, since it will shift when the PCM is taken out of the equation.