It is doubtful that there is a mechanical problem on the transmission side, there just isn't enough to go bad related to the speed sensors. The transmission would be long inoperable before the slotted wheels spin off center enough to affect the sensor operation.

The goal is to look at the wave form ( where the wire goes into the trans computer ) and see if it changes, if the wave form changes when the error code is tripped there is a wiring or sensor problem. If the wave form remains consistent, there is a problem with the computer.