if I recall correctly the 1g dsm's vss is a small box on the back of your gauge cluster... mine reads 2 mph when sitting parked lol... I think when it is under 8 mph on the logger is when the studder works.. no need to add any wires..
what I did was change the setting down to 2500 rpm's and tested it.. it worked so I moved it up to 4500 where it sits at now. hope this helps.
Steve