64 727 help

[Bb70charger500]

OK I'm not usually in this older car area but I need some help ,I'm working on my 1964 300 K I know it's not a b body but it doesn't mater, I just had the trans rebuilt and I got it in the car won't start now I can jump the relay and we're good . so I'm guessing the neutral safety switch ? but this is a very different setup then I am used to it's a floor shifted car but has two cables a park cable and then a gear selector cable. I see a switch on the side but it's a single terminal looks like a reverse switch, the trans shop shrugged his shoulders I ordered a part from rock Auto but it says 1970-2001 on the bag and it's a plastic thing with a rivet someone help me out here is the single terminal a neutral switch or reverse light switch . where can I get one as apparently rock Auto has gone insane in the membrane!

 

[Bb70charger500]

they sent me this as a n.s.s.

 

[Glenwood]

Make sure the NSS is continuous to the transmission body and that the transmission/engine has a good ground strap.

 

[Bb70charger500]

Well I just got off the phone with a old mopar friend he couldn't stop lol at me and rock Auto we figured out the switch I'll attach the picture of one after I found out a part number

 

[Bb70charger500]

Thanks guys I'll double check the grounds but I'm 100% sure everything is good . I'm actually familiar with this switch it's the same one that we used on the dump trucks trans as a reverse switch when the trans got rebuilt they always failed no mater what once the pressure is off the ball it brakes !

 

[khryslerkid]

Sounds like your cable adjustment is off. Read the adjustment procedure in this link...

http://www.1962to1965mopar.ornocar.com/transtech.html

 

[HEMI-ITIS]

There is a short and a long NSS.Also a 1 wire and a 2 wire,just don't ask me which is which,,,,,

 

[Bb70charger500]

Now your making life difficult again! well he said he didn't mess with any cable adjustments the car gos into every gear fine and drives perfectly

 

[HEMI-ITIS]

LOL,,,,just check the NSS wire at the starter solonoid for ground.If it's not grounding then it is the switch,,,,,but which switch??

 

[Bb70charger500]

Thanks guys I have a few things to look into I guess

 

[Bb70charger500]

You know why do I always skip the easiest test first ! Never fails that's why I hate elc problems I always assume the hardest repair first

 

[miller]

I ran into the same thing on my 64 Sport Fury. Console shift car, 727...on 64 models found out the nss switch is different, between push button, and console shifts. Just so happens I put a 67 model 727 in my 64.
You need a nss for a 67-68 727. (Did the builder swap 'em? If the trans is out of the car, should have had the correct one, with the right selector comb.)
67 model 727's nss was missing. The nss out of my 64 console shift 727 slipped right in my 67 727!

 

[Ski 61701]

Have someone push the neutral button on the dash and see if the rooster comb actually touches the nss. It almost looks as if the fingers on the comb are too short to reach the nss itself. Hence the longer arm looking thing sonnax sent you. Does that somehow get riveted to the rooster comb?

 

[Bb70charger500]

Nope it's my trans ,he is an actual builder I stamp all my stuff when it gos to him I get my stuff back everytime

 

[khryslerkid]

Have someone push the neutral button on the dash and see if the rooster comb actually touches the nss. It almost looks as if the fingers on the comb are too short to reach the nss itself. Hence the longer arm looking thing sonnax sent you. Does that somehow get riveted to the rooster comb?

He has a floor shifter instead of the push button.

Did you hold the key in the start position and move the shifter slightly back and forth to see if the ssn makes contact?

 

[Ski 61701]

Guess my gist is make sure the gear selector is in neutral and see if the comb makes contact with the switch.

 

[Ski 61701]

Im basing my response it looks like he has the pan off. Im really curious what that little lever thing is that he posted earlier

 

[miller]

That particular NSS only covers a couple years...meaning it's harder to find. Don't know if it helps, but the seal it takes is a cupped crush washer type. At least that's what's on mine.

What your looking at is fairly easy to check! First, locate the single wire, that runs from the NSS to the starter relay. Make sure it's in good shape. Pull the wire at the starter relay, use a multimeter at that end, and check for continuanty to ground. Should have contact to ground, both when shifter is in park, and neutral.
If not...you'll get fluid out of trans...pull the NSS. Look in the trans, at the rooster comb...should have a 'finger' on the comb, centered at the NSS hole, both park and neutral.
You can also check the NSS (installed), via the shifter, going from the NSS's stud to ground, to see if there's contact.
If not...wrong parts, or needs adjustment on the shifter.

 

[dvw]

2 different single pin switch styles. White plastic plunger and steel plunger. steel is longer than the plastic. Steel one has threads deep enough that the rooster comb can hang up on it. This will cause the rooster comb not to move all the way to neutral. If the switch is the shorter style it may not be depressed far enough. Easy to check. Ohm meter should show continuity to ground in neutral, then the switch is working. Look at the starter relay circuit. If you want to know for sure drop the pan and take a look. The amount of interference is very little.
Douug