I was gonna ask if you tried to manually shift it into first to take off. Sounds like it may not be down shifting correctly. Since that transmission is electronic, there are some factors that could keep it from down shifting properly.
Throttle position sensor
vehicle speed sensor.
Sticking 1-2 shift solenoid
Generally when the filter gets plugged in the trans it causes it to hard shift , or string out the gear longer than it needs to before shifting.