4L60E Torque Converter

[solidaxel]

Are the internal wire harness the same for a 2003 and 2008?
I am having trouble with a 741 code TC stuck off

The trans computer is a T42 and is for a 08 and my trans is 2003 is there any wiring/harness difference
that would cause a 741 code?

The trans is an upgraded/rebuilt from a local builder that has built trans for me for many years, before I go to him I am trying to dot all the "I" and cross all the "T's"

The trans does go into lock up at 55mph for a short time 20 to 30 min of driving, but if I go to WOT "I think"
this is where things happen!
3rd and 4th seem "confused" for a while and will finally shift into 4th, but does not go to lock up

I have moved the purple wire from the brake switch and hooked to the ground wire at the tail lights and with the brake on it has 12vdc at the purple wire
brake off no voltage at purple wire when if in off

P0741 is TCC lock up off