currently doing a 4l80e swap and noticed my trans doesn't have the provision for the Neutral safety switch. Am I able to delete that switch? also, i can use the OEM TCM to control the 4l80e with a segment swap?
currently doing a 4l80e swap and noticed my trans doesn't have the provision for the Neutral safety switch. Am I able to delete that switch? also, i can use the OEM TCM to control the 4l80e with a segment swap?
https://www.pcmofnc.com/product/pcm-...rsion-harness/
As the GTO is so weird about so many things, it doesn't share a TCM OS with anything else that ever came with an 80E, so no segment swaps available that I know of. (you could use the entire OS from a truck and it would talk to the ECM fine, but the rest of the car wouldn't like it)
i already have the harness. the 4l80e doesn't have mounting points for the Neutral safety switch. so seeing if I need a new transmission or i can delete that.
mmmmmm what to do about the TCM then i guess.
You already have 'a harness', or you already have a 60E to 80E adapter harness that works with a plain 60E TCM OS? If you already have an adapter harness, do you have the wrong one for your version of the 80E?
I don't think I've ever seen one with no bolt holes for a P/N switch. What year is it? What did it come out of?Originally Posted by Swayc09
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I don't know if I've ever encountered one without those holes.. Are you sure?
That switch mainly just handles if its in P/N or not or reverse.
Tuner at PCMofnc.com
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4L80e from summit
https://www.atechmotorsports.com/parts/BMM-118001BM
https://www.atechmotorsports.com/parts/BMM-118001BM
i have the 60e to 80e adapter harness - the harness plugs into the transmission electrical connector.
Glad I'm not the only one LOL
One of my best friends is a transmission builder with probably 30 years experience. I'll run this by him.
Last edited by edcmat-l1; 10-09-2023 at 03:49 PM.
EFI specialist
Advanced diagnostics, tuning, emissions
HPtuners dealer and tech support
email=[email protected]
I used the gear selector's neutral position for safety switch.
The 4l80e has a gear position on the side which is used by the ECU for physical gear position. But a neutral safety switch is usually part of the ignition circuit - not the ECU. And although I am sure you could use the signal off the side of the transmission for neutral safety it doens't make sense to me to do that if you have a perfectly good OEM style shifter. The 4l80e also has an internal pressure switch to tell hydraulically which gear is on but that wiring is internal and also wired to the ECU directly for reporting current gear.
This is the gear position sensor on the side of my 4l80e transmissions
But it wires to the ECU not the ignition. It may be used for some OEM vehicles neutral safety but I did an engine swap into a Nissan so I don't really know how that originally works. Just trying to help.
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