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Eureka! The fault was with the TCM. I couldn't use the donor PCM as the SKIM device intervened and killed the ignition circuit. Gladly though, the fault lay with the TCM, and with a donor unit and the original PCM the speed reading came back, and the dear 41TE started to shift up and down on cue. Th...

Thanks to 'Jenni' and 'O Demons'. Wise words from both. I have checked that red/white wire, and all places where 12V should be on the TCM / PCM. The two control modules did come from the same 41TE Neon. I did wonder about sticking the old PCM back (with fingers crossed), and with your encouragement,...

I would really appreciate your good advice concerning a 2001 UK Neon with limp in P1698. Unfortunately export Chrysler Neons received the 4 speed ahead of the domestic Dodge-branded cars and I have comms issues between TCM and PCM. All grounds are 100%, as are all interconnecting loom wires and conn...