The transmission has been acting funny for the last couple of days. Today while driving on the highway it reved from 3K to 33K and back down and back up and back down (pretty fast) and then I lost all power from the SC which stopped working. When I came to a stop the car stayed in the upper gear and wouldn't downshift even if I tried manually. It goes into park, reverse, neutral and drive but not any low gears in drive.

From what I've read, it may be a few things, solenoid, conductor plate, transmission fluid level, speed sensor......

The trouble codes are;

P0758 ShiftSolenoid B Electrical

P0715 Input/Turbine Speed Sensor CircuitMalfunction