1992 F250 Multiple Error Codes

I've got multiple error codes on my F250.
It doesnt seem to have the power it used to, ie when I floor it when pulling toys, it doesn't down shift by itself. But other than that it drives as normal.

I don't have any blown fuses. Could this be a bad ground?

636 Transmision Fluid Temperature Too Hi or Too Low
634 Transmission Range Sensor Voltage Higher or Lower
452 No Input from Vehicle Speed Sensor
122 Throttle Position Sensor Below Minimum Voltage
327 EGR Circuit Voltage
328 EGR Valve