Error codes: P0715 and P0730. Both were noted as pending on the ECU which is why I never got a check engine light.
P0715: Input turbine speed sensor circuit 'A'.
P0730: Incorrect gear ratio.
I'm led to believe that the bad sensor is leading to an incorrect gear ratio which didn't make sense to me at first with an automatic transmission. I think because of the bad sensor(s) the TCM or PCM doesn't know the MPH or RPM of the engine and doesn't know when to shift. The computer then disengaged the transmission entirely but not to limp home mode probably because it couldn't. Worst case it is a TCM failure, torque converter failure, or electrical damage in hard-to-reach areas.