4R75E Code P0731
 

After rebuilding the transmission and doing some test driving, maybe after 5 miles and some starting and stopping, I get this P0731 first gear incorrect ratio. New clutches, seals, EPC solenoid, and shift solenoids from Ford, sent the valve body away to get checked and rebuilt, new oil and filter, converter, new sensors on the transmission. Line pressures are good. What driving I’ve, done, seems to have all the gears, reverse is good too. Any thoughts?
Thanks

This transmission is in 2007 F150 5.4

It is starting off in 1st gear and not second , right?

Might look a little deeper into speed sensor.

Scanner shows 1 st gear and then if I’m looking at things correctly, I watch the gear ratios change on the scanner as it is shifting
Thanks