Scanner reporting C0236 rear wheel speed missing

Clear the code and take the car for a ride. After around 8 MPH guess (speedometer not working) the ABS goes on and brake light is on also with message fixed braking system. Also, at the same time the transmission drops to limp mode, like I am in second gear.

Replaced transmission VSS and same results.

Checked voltage and resistance, of each front left and right wheel sensor both with in spec.

Shift fine, no other issues I am aware of.

Is there a way to verify the VSS (transmission} is good? Suspect possible EBCM or PCM controllers. Not sure what it could be.

Note: Replaced PCM 2 years ago had numerous code errors. Fixed the problem.

Please advise.