Q: What would the most likely problem be for the engine codes: 0700 and 0740 on 2003 Chrysler Town & Country

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A leaking transmission was discovered and the fluid was low. The vehicle surged when downshifting while breaking at or above 45 mph. The solenoid gasket and the transmission pan gasket have been replaced. New fluid has been added/changed to the proper level. The Town and Country still surges, but now at a lower shifting point-- second to first. The surging is less severe. Codes 0700 and 0740 are present. What is the most likely problem? Is it a good idea to flush the transmission? Is there a device which can clear the codes and reset the PCM? Thank you in advance for your helpful answers.
(1) Answer
(1) Comments
Sounds like the TCM has failed (Transmission Control Module). You should take to trans. shop for diagnosis. Other possibility is the torque converter clutch solenoid. Best to get the diagnosis before throwing money and parts at it.