You're right Bill and I hope you're doing well. Anything that could disrupt the pulses from the sensor could set the code. And a chain with a lot of slop could create havoc on the pulses. Another likely scenario would be the reluctor with loose pins as this seems to be a problem area. Again, looseness in the pins of the reluctor would upset the timing of the pulses. But I figure one may as well check the wiring and see the results of the sensor since they can be checked from the outside of the tranny.