Quote:
Originally Posted by gringoloco
He's saying to have the ground side of the TCC switched through the 4th gear pressure switch and the positive side controlled by the PCM through a brake switch so that it will only lock up in fourth gear and disengage when you hit the brakes. This is how my vacuum setup is wired.
The VSS you chose may not give you the fidelity needed for the PCM to know what speed you're actually traveling. Dakota Digital has a signal multiplier and you may be able to change the input via tuning software to remedy this.
I think this is very do-able and a neat option to have if you can get it to work.
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Ok, I follow you on the wiring of the pressure switch. As far as the pcm goes, I need to look into it more but I believe there is a wire going from my pedal switch to the computer telling it when the brake is engaged. Basically the brake interrupt wire would be passing through the PCM on its way to the trans. The PCM could (hopefully) connect or break that circuit using information from the map sensor. This way, the brake pedal would need to NOT be engaged AND vacuum conditions would have to be right in order for the solenoid to see this signal. Maybe this is all too good to be true, that's why I'm asking and trying to understand.
As far as the Dakota Digital VSS goes, you could be right. EFI Live can do a lot in the way of making adjustments to accept different input frequencies and what not. I will do what I need to do to make it work one way or the other. I know it has been done plenty of times by others.