Car turns over (starts) only in N, not Park
#3186670
10/26/23 02:31 PM
10/26/23 02:31 PM
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Joined: Dec 2021
Posts: 1,144 Loudoun County, VA
Brad_Haak
OP
super stock
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OP
super stock
Joined: Dec 2021
Posts: 1,144
Loudoun County, VA
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I've lived with it, but I know this isn't "correct" in terms of standard 727 functionality. Suggestions, appreciated! Thx
2021 Challenger 6.4L Scat Pack 1320 100% stock: 1.680, 11.894 at 113.75 (DA 175 ft) weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)
1973 Challenger 452 ci street/strip [2008] pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
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Re: Car turns over (starts) only in N, not Park
[Re: Brad_Haak]
#3186674
10/26/23 02:40 PM
10/26/23 02:40 PM
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Joined: Jan 2003
Posts: 20,184 Park Forest, IL
slantzilla
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 20,184
Park Forest, IL
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Linkage/cable slightly out of adjustment is where I'd start.
"Everybody funny, now you funny too."
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Re: Car turns over (starts) only in N, not Park
[Re: AndyF]
#3186743
10/26/23 11:06 PM
10/26/23 11:06 PM
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Joined: Jan 2003
Posts: 15,411 Omaha Ne
TJP
I Live Here
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I Live Here
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Posts: 15,411
Omaha Ne
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That failure tree has several branches. Could be a bad neutral start switch, missing switch, wiring failure, internal failure inside the transmission, etc.
A visual check is the first thing. See if the wiring is hooked up, is the switch installed, etc. You can check the switch for operation with a voltmeter. If the switch isn't working it could be a bad switch or it could be a busted rooster comb. Might need to pull the pan off the transmission if the string of clues leads you there. If it starts in Neutral, the wiring and switch would have to be OK
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Re: Car turns over (starts) only in N, not Park
[Re: stumpy]
#3186753
10/27/23 01:10 AM
10/27/23 01:10 AM
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Joined: Nov 2004
Posts: 16,487 On the run…
BloFish
I Live Here
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I Live Here
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On the run…
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Shift linkage adjustment. Park is touchier than neutral. That’s usually the case.
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‘65 A100 ‘69 ‘Cuda ‘73 Vega GT ‘06 Mega Cab ‘14 Mercedes SLK
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Re: Car turns over (starts) only in N, not Park
[Re: BloFish]
#3186796
10/27/23 11:27 AM
10/27/23 11:27 AM
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Joined: Dec 2021
Posts: 1,144 Loudoun County, VA
Brad_Haak
OP
super stock
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OP
super stock
Joined: Dec 2021
Posts: 1,144
Loudoun County, VA
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Linkage has new bushings and has been adjusted for clean engagement from P to 1... thinking it's the NSS now. Thx
2021 Challenger 6.4L Scat Pack 1320 100% stock: 1.680, 11.894 at 113.75 (DA 175 ft) weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)
1973 Challenger 452 ci street/strip [2008] pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
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Re: Car turns over (starts) only in N, not Park
[Re: Brad_Haak]
#3186826
10/27/23 12:42 PM
10/27/23 12:42 PM
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Joined: Sep 2003
Posts: 19,466 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,466
north of coder
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all the NSS does is complete the ground circuit to the starter relay, allowing the relay to energize the starter circuit. if it starts in neutral but not in park, the switch is good. that leaves only the linkage adjustment or the rooster comb as problem areas to address. the NSS may need to be tightened a little more, or the wiring inspected to be sure the shift linkage is not inadvertently "moving" the plug a little. that tidbit cost me more than a few hairs to be lost before discovering that.
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Re: Car turns over (starts) only in N, not Park
[Re: TJP]
#3186830
10/27/23 12:58 PM
10/27/23 12:58 PM
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Joined: Jan 2003
Posts: 25,858 Rio Linda, CA
John_Kunkel
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Too Many Posts
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Posts: 25,858
Rio Linda, CA
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If it starts in Neutral, the wiring and switch would have to be OK Yes, the pic below shows the contact points that ground the switch, Park is the top arrow and Neutral is the bottom arrow. If it starts in Neutral but not Park, the linkage is preventing the roostercomb from traveling far enough to make contact.
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Re: Car turns over (starts) only in N, not Park
[Re: moparx]
#3186841
10/27/23 01:43 PM
10/27/23 01:43 PM
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Joined: Jan 2003
Posts: 15,411 Omaha Ne
TJP
I Live Here
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I Live Here
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Omaha Ne
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all the NSS does is complete the ground circuit to the starter relay, allowing the relay to energize the starter circuit. i f it starts in neutral but not in park, the switch is good.t[u]hat leaves only the linkage adjustment or the rooster comb as problem areas to address.[/u] the NSS may need to be tightened a little more, or the wiring inspected to be sure the shift linkage is not inadvertently "moving" the plug a little. that tidbit cost me more than a few hairs to be lost before discovering that. With what he and others are saying The switch doesn't know or care what position the shifter is in only that the contact point is depressed or touching the rooster comb to ground the signal wire. There are different rooster combs as well. tightening the switch as MOPARX suggested and if possible may do the trick. The attached pic is a generic 727 valve Body but shows the two points that ground / depress the contact. Second pic is of a 3 pin NSS with the center pin being the contact point.
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Re: Car turns over (starts) only in N, not Park
[Re: John_Kunkel]
#3186925
10/27/23 09:06 PM
10/27/23 09:06 PM
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Joined: Jan 2003
Posts: 15,411 Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 15,411
Omaha Ne
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If it starts in Neutral, the wiring and switch would have to be OK Yes, the pic below shows the contact points that ground the switch, Park is the top arrow and Neutral is the bottom arrow. If it starts in Neutral but not Park, the linkage is preventing the roostercomb from traveling far enough to make contact. You treed me with the post & pic John 🍻
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Re: Car turns over (starts) only in N, not Park
[Re: Wheeler]
#3187157
10/28/23 08:07 PM
10/28/23 08:07 PM
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Joined: May 2019
Posts: 6,282 nowhere
Sniper
master
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master
Joined: May 2019
Posts: 6,282
nowhere
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Bad neutral safety switch?
The NSS doesn't have different positions for P and N. It is simply an on/off switch that the rooster comb inside the trans actuates.
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