P0715 and P0720 codes with no fix…Help!

At various times, I have had both P0715 and P0720 codes. I have replaced Input Speed Sensor, Intermediate SPeed Sensor, vehicle Speed Sensor, and TCM. I have used multiple sensors. I have checked continuity on all sensor wires. Mazda dealer recommended the same path that I already took, so I took the car home. Not sure where to go next. Help !!
 
Year car?

Engine?

I assume it's an automatic?

For my car, the 2.3L for 2008, the Input Speed Sensor appears to connect to the PCM. So I would suspect a bad PCM.

You really need the Factory Service Manual for your year vehicle with the wiring diagram to see what best to look at.
 
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