Quote:
Originally Posted by ls1nova71
You need the part of it that lets the PCM know what gear it's in. But you don't have to use the truck one, a simple wire that is grounded in park and neutral will work, but you need to change it in the tune for that route to work. That said, it really isn't all that much harder to keep it and run the starter relay off of it and also the back up lights. Using the switch on the transmission you get a more positive neutral safety since it will only start in neutral and park, sometimes using the column mounted NSS you will get some slop in the linkage and will have to fiddle with the shifter to get it to start in neutral. It's a design flaw that gets worse with age and wear, so I just keep the trans mounted switch.
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As always you are more thorough than me
My transmission really only has input from the VSS sensors (well the second one on a 4l80e isn't technically a vss, but for conversation sake), I do not use the PRNDL indicator, the whole thing has been removed. The thing is I don't use a NSS, my truck can start in gear, and I also don't run reverse lights of any kind..so I'm a couple wires shorter than most swaps.