1. Drive about 60 MPH on a smooth straight road. Check the Torque Converter Clutch (TCC) operation.

2. If it shudders or is not smooth when engaging, flush the fluid and put in only ATF+4.

3. If there is no converter lock-up, replace the torque converter.
Tech Tips:
The P0700 code means that the Transmission Control Module (TCM) has a stored code and requested the MIL be turned on. On this vehicle the TCM and PCM are in one computer but the scan tool has to go into the individual module to read codes.