Yeah, I did a lot of reading there, looks like CarlD could help.
I'm starting to figure stuff out, though. Here's the update after my commute home:
I changed the MTH on my ISS and OSS codes to add 300 before displaying, and everything looks right, except at a dead stop when both read 300. By the time the ISS reads 900 it's accurate and I assume the OSS is accurate by that time too. It stays accurate up to 70mph.
The issue of the ISS reading higher than idle when it shouldn't seems to have explained itself once I fixed the numbers. ISS reads as if I'm in gear when I'm in Neutral. Theory: ISS is not measured between the TCC and the transmission, it's measured somewhere between Neutral and the gears...or there is no sensor and it's calculated.
The TCC Slip Speed XGauge code I tried (which I may have not mentioned above) just needed to be divided by 10 and it seems to be correct now. However, it reads 5000-6000 when I'm in Neutral. WTF?
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