I have a 2000 dodge ram 1500 v8 magnum sport,""Replace Torque Converter Clutch (TCC) Solenoid"

i have a 2000 dodge ram 1500 v8 magnum sport, my check engine light went
on so i took it to autozone and the computer brought back a error reading or
something saying, "Replace Torque Converter Clutch (TCC) Solenoid, and
the error codes read, P1740 TCM Internal Malfunction. what could this be?
Before i had my buddy replace the transmission fluid (no shavings but dark in
color) because i guess i accidentally put it in overdrive because the light was
on for that and the trans temp light was on too and it started smoking from
engine so he fixed it by replacing the trans fluid (very well done btw), i do
think it needs just a bit more trans fluid because it very minorly jerks but soon
after he did all that this happened. What could this error be that i got from
Autozone?
Thanks in advance :)