Ford Wiring/Electrical :: PCM Randomly Shifting - 0.04V Dither?
Aug 13, 2017
m having a really difficult time with my '95 7.3. Basically, the PCM is randomly shifting the transmission out and back into 4th with the TC locked. When I say randomly, I mean very randomly: sometimes once in a 100 miles, other times chronically, with no relation to weather, temps, incline, driving conditions, etc.
According to FORScan (using a high quality ODBLink SX USB cable) some sensors are showing a 0.04V dither (this is with the engine off, van immobile): I've already replaced the PCM ($$$) to no avail.
I'm truly lost as to what to try next. I'm about ready to drive this thing into a canyon. FORScan screen shot showing 0.04V spikes
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