Author Topic: Neutral safety switch bypass  (Read 662 times)

Mileswinger

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  • 1977 trans am 403
Neutral safety switch bypass
« on: May 19, 2022, 02:16:22 PM »
Is anybody familiar on how to bypass the neutral safety switch I am in the process of wiring my ls 6.0 and it has gone from a auto to a Manuel t56 magnum How do I bypass the switch so that I am able to make it work or turn it off completely with the new transmision
1977 trans am 403

b_hill_86

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Re: Neutral safety switch bypass
« Reply #1 on: May 19, 2022, 02:34:34 PM »
As long as the backdrive linkage is disconnected, which it would be with a trans swap, you can technically leave it alone. My 77 is factory auto to 4 speed swapped. I left the neutral safety alone and leave the column in the “park” position and there are no issues. Granted, the car will start with it in gear and the clutch out which some may not like.

You could also unplug the wire from the switch and put a jumper between both terminals to completely eliminate the switch.

And lastly, you could hook up the wires to a clutch safety switch like factory 4 speeds had to prevent the car from starting with the clutch out.
-Brian-

1977 Trans Am 400 4 speed

Mileswinger

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  • 1977 trans am 403
Re: Neutral safety switch bypass
« Reply #2 on: May 19, 2022, 05:53:48 PM »
Would anything change if I have a steering column swap?
1977 trans am 403

Wallington

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Re: Neutral safety switch bypass
« Reply #3 on: May 19, 2022, 06:01:20 PM »
Who's doing the engine swap and wiring?

b_hill_86

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Re: Neutral safety switch bypass
« Reply #4 on: May 19, 2022, 07:49:21 PM »
Would anything change if I have a steering column swap?

Likely, yes. You could probably still use a jumper or use it for clutch safety. Don’t forget you’ll lose reverse light function too just fyi but there are ways to remedy that
-Brian-

1977 Trans Am 400 4 speed

Re: Neutral safety switch bypass
« Reply #4 on: May 19, 2022, 07:49:21 PM »

Mileswinger

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  • 1977 trans am 403
Re: Neutral safety switch bypass
« Reply #5 on: May 20, 2022, 11:39:07 AM »
Ok I will just jump them any chance you know the colors of the wire that need to be jumped?
1977 trans am 403

b_hill_86

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Re: Neutral safety switch bypass
« Reply #6 on: May 20, 2022, 04:21:28 PM »
My 77 is purple and purple with a white stripe. If your old column is still in, they’ll be plugged into the neutral safety switch mounted low on the column near the pedals. It can kind of be seen here on Firebirdparts’ website.

https://firebirdtransamparts.com/techinfo/harness/optionwire/optionwire.htm
-Brian-

1977 Trans Am 400 4 speed

Wallington

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Re: Neutral safety switch bypass
« Reply #7 on: May 20, 2022, 04:23:46 PM »
Get yourself a service manual for whatever year it is. You'll need it several times during an engine swap, rather than guessing or asking those who do have one.

b_hill_86

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Re: Neutral safety switch bypass
« Reply #8 on: May 20, 2022, 05:43:24 PM »
No doubt the manual is a life saver.
-Brian-

1977 Trans Am 400 4 speed

kentucky yeti

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Re: Neutral safety switch bypass
« Reply #9 on: May 24, 2022, 06:52:45 AM »
From a friend who just did this: You can get rid of the back drive rod and attach an external NSS, like from Flaming River.  Reverse lights and neutral safety switch are operational.  That's if you did a steering column swap. 

    ***Also, you can get a kit from Firebird Central (DAS-2076) to add to the floor shifter.  That's what I am going to do on my '69.
Mike (aka Yeti)

1977 Y82 W72 Auto
2015 F-150 Lariat 4x4 (twin turbo)
2016 Explorer Limited
2012 Mustang

Re: Neutral safety switch bypass
« Reply #9 on: May 24, 2022, 06:52:45 AM »
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