2002 Sebring Limited Convertible Diagnostic Code P0740
I understand code means "torque converter clutch circuit" but I can feel no change in driving characteristics. Had transmission serviced with oil and filter change plus an additive. Car ran for about 40 miles before light came on with same code. Still detect no change in driving characteristic.
Dealer wants $600 to look inside transmission before giving me estimate for repair. What is likely problem? Should I keep driving auto until it drives as though something is wrong?