MuuMuu101's 68 Dart, A Learning Process...

I'm a little surprised here, does the kit allow pulses per mile programming? The transmission already has a VSS electronic speed sensor in it, on the passenger side that uses a Ford connector (Standard Motor Products S699, I believe for a 2004 Mustang with a 5-speed). Should be 17 pulses/revolution
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Also your reverse lockout solenoid isn't hooked up? That's the connector right above the mechanical speedo take-off. I have mine powered by megasquirt when the vehicle is under 5 mph so it's a breeze to stick in reverse.