The gearbox doesn't move the selector. D engages the gubbins in the valve body to allow the TCU to control the various clutch packs to allow it to select forward gears. Anything after D is synthetic as far as the gearbox is concerned. That just lets the TCU do different things depending on the position of the F125. Think of S or 432 as 'driver request' to the TCU to do something different to D. Mechanically the gearbox doesn't care.
The 5-arc set in my switch looks flawless. The contacts are slightly grubby but nothing stands out. I'll get a pic later.
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