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Username Post: Neutral Safety Switch for OD trans?        (Topic#366467)
gpbeau 
Newbie
Posts: 3

Age: 54
Loc: Cleveland, OH
Reg: 09-21-21
09-21-21 09:15 AM - Post#2827599    

I run a 4L80e in my '67 coupe and use the original column shifter. Everything works great except the reverse lights come on in Neutral and the car can only be started in Park because the Neutral Safety Switch was intended for a 3-speed and now the detent positions don't align with the reverse and neutral positions on the switch. Does anyone know of a late-model application (late model being 80s or early 90s....) that used an OD trans (2004r, 700R4, 4L60/65e, 4L80/85e)that would bolt on to the '67 column? Ideally, it would use the same harness connector, but I can swap that out to the correct connector for the new switch. All suggestions are appreciated!



 


jktucker92 
Silver Supporting Member
Posts: 493
jktucker92
Loc: West Richland, WA
Reg: 02-05-17
09-23-21 11:48 AM - Post#2827804    
    In response to gpbeau

On the 4L80E, there is a neutral safety switch on the side of the transmission. If your transmission doesn't have one, you could buy one and get the corresponding connector for it in a junkyard. You would have to run the wires from it inside to use the functionality and splice it into the harness somehow.



 
gpbeau 
Newbie
Posts: 3

Age: 54
Loc: Cleveland, OH
Reg: 09-21-21
09-23-21 02:23 PM - Post#2827817    
    In response to jktucker92

Thanks for the reply. That's the transmission range switch for the 4L80e. I didn't install one, but that's an interesting thought. I think that requires a selector shaft which is easy enough to change. Do you happen to know if the range switch also includes a reverse switch.? My major annoyance is that I don't have reverse lights except in Neutral. Would also be nice to be able to start the engine in neutral, too. THANKS



 
jktucker92 
Silver Supporting Member
Posts: 493
jktucker92
Loc: West Richland, WA
Reg: 02-05-17
09-27-21 07:37 PM - Post#2828148    
    In response to gpbeau

Yes, the selector switch does include the backup light circuit. Attached are the related diagrams from a 2004 Truck. Looks like pin 11 (pink) is used to power the two circuits you're interested in, Pin 10 (Gray) powers the backup lights, and Pin 1 (Dk Green) Enables the start circuit. Note that for 2004, the switch enables a relay, and the relay provides power to the starter solenoid. I don't know if the switch can handle the power required to operate the solenoid itself, but you could definitely use it to enable a relay like the stock application.

Attachment: Backup_Lights.gif (166.09 KB) 1 View(s)


Backup light circuit


Attachment: Starting.gif (164.78 KB) 1 View(s)


Starting Circuit




Attachment: Tranny_Connector.png (97.97 KB) 0 View(s)



 
gpbeau 
Newbie
Posts: 3

Age: 54
Loc: Cleveland, OH
Reg: 09-21-21
09-28-21 05:19 AM - Post#2828155    
    In response to jktucker92

For the win! I started researching this and found a ton of diagrams and pinouts--mostly for the 2-connector version of the PNP--this looks like the single-connector which I prefer. Good call on powering the starter solenoid--I hadn't gotten there, yet. Yes, it likely makes sense to use a relay and I think there is already one in place in the fuse box for my LS conversion; will have to verify that. This really looks like a good solution--thanks for the suggestion!



 


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