Update: I posted over on Ford Truck Enthusiasts and thankfully Mark Kovalsky, a 20-year transmission engineer with Ford, replied.
The 4R100 did change from a single gear-driven VSS speed sensor in 1999 to two magnetic-reading sensors, a TSS and an OSS, in 2000.
I found the code tag on my replacement transmission and unfortunately it's a 2001, built 12/4/2000. So while the harness on my van has only one sensor connector, this transmission expects two.
MG sent the SGI-5E, but on reflection I think what Bet on Black said in post #22...
Quote:
Originally Posted by bet on black
I would find a pcm and trans harness for the 4r100 instead of trying to band-aid it and using the wrong pcm and harness.
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and what MadScience said in post #25...
Quote:
Originally Posted by MadScience
My last thought is that switching the PCM might be slightly more right.
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...would be the better approach. So off I went searching the interwebs for one of each. Easy peasy, right?
Wrong! Yes, refurbished PCM's are readily available. However, the 2000+ harness,
Ford part #YC2Z-7C078-CA, has been discontinued. If anyone has a line on one, please let me know.
Ford Parts Giant has
a harness whose part # is very close, but it says it's for 5.4L CNG vehicles only. I can't see why it would be different, but then again I'm the guy who couldn't see why a 2001 4R100 would be different!
No one at FPG would confirm if the CNG harness would work; nor would they send me a pic; nor would they even tell me if I could return it if it didn't work. After 2 days of buck-passing on their side, I got frustrated and told them to pound sand.
So now I'm keeping my eye on local Pick n Pulls for a 2000+ E350 with a 5.4...