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Not too sure on how it works. I tried dissecting the blackbox but RENNTech actually painted over the circuit board to hide what kinda doodads they put in there.
All I know is that it somehow works in conjunction with the snowchain switch. If you look at the diagram, which shows that you tap into the snowchain switch, what it basically does is it keeps it on regardless of speed (the snowchain light is permanently on). If it involved solely that, it doesn't quite explain tapping into the ASR wires in the computer box.
I would surmise though that it somehow blocks the speed differential signals or something from reaching the ASR module so it doesn't kick in above the snowchain cutoff point.
The snowchain switch alone is a bit useless after the initial launch as you'd already be past the cutoff point when you shift into 2nd gear at WOT. The upshift causes wheelspin sometimes as well.
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