Problem with 2001 TJ Neutral Safety Switch - JeepForum.com

 
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post #1 of 13 Old 07-03-2008, 08:26 AM Thread Starter
OrlandoTJ
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Problem with 2001 TJ Neutral Safety Switch

My issue is the Automatic transmission (A/T) shifter is loose (i.e, has about 1/8in movement when in a selected position (Park,Rev,Drive, etc) and occasionally it appears the NSS does not allow me to start the engine (symptoms: power is evident but nothing happens when turning the ignition switch). Note: When I move the A/T shifter through the gears (brake pedal depressed and switch in ACC position) then put the shifter back in park, the engine will start.

Question:
1) Where is the NSS on a 2001 TJ w/ Automatic (3-speed)? ( I am guessing on driver side where the cable comes out of the firewall into the transmission?)

2) Is there an adjustment to the NSS or do I need to replace it? If so has anyone done this and can share the How to?

3) Finally is there a way to "tighten" up the A/T shifter (or is this related to the NSS?)

Any and all suggestions/comments/pictures are most appreicated.
Thanks in advance

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post #2 of 13 Old 07-03-2008, 09:48 PM
sturgeda
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I have the same issue with my '98 TJ. I had a new NSS put it and it still does the same thing. Now when the symptom happens, I press the brake and shift into neutral. Turn the key and away I go.

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post #3 of 13 Old 07-04-2008, 05:17 AM
dodgetk81
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The switch has no adjustment. Your issue seems to be with your cable. Check each end to make sure its clipped fully into the bracket.

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post #4 of 13 Old 07-05-2008, 01:49 PM Thread Starter
OrlandoTJ
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Thanks for the replys, I'll inspect the cables to ensure they are connected correctly.
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post #5 of 13 Old 07-05-2008, 01:53 PM
Jerry Bransford
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It's not the NSS, it's the cable length adjustment which is done at the forward-most cable attach bracket on the transmission. A lock clip is pulled out and the cable housing is moved fore or aft until it is positioned properly.

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post #6 of 13 Old 07-07-2008, 10:01 AM Thread Starter
OrlandoTJ
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Thanks Jerry. Altough I am a bit nervous on doing adjustments on a "working" tranny. Do you have any additional steps on adjusting the position of the cable and will this tighten up the "play" in the T-handle?
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post #7 of 13 Old 07-07-2008, 10:07 AM
Jerry Bransford
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You're not adjusting the tranny itself, you're just adjusting the length of the shifter cable until it is the correct length so it properly engages the NSS. Once you look at the forward attach point on the transmission where the cable first attaches to it, you'll soon find the lock clip. With that released, and that clip won't come off entirely, you can just slightly move the cable fore or aft until you get the NSS so it reliably starts in Park and Neutral. It won't take much fore or aft adjustment to get it right. I knew nothing of how to make that adjustment until I installed my automatic tranny (converted from a 5-speed manual transmission) a few months ago when I HAD to and then it was easy once I actually started the job.

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post #8 of 13 Old 07-07-2008, 10:43 AM Thread Starter
OrlandoTJ
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Sounds like a simple fix. I'll give this a try later tonight. Again thanks for the input!
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post #9 of 13 Old 07-11-2008, 11:15 AM Thread Starter
OrlandoTJ
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Just an update, based on the above suggestions I went and checked around the cables connecting to the transmission and found that the throttle valve level was loose and I could move it up/down on its connection shaft (almost to the point of it coming off). After re-tighting the bolt holding it to the shaft, the T-shifter now engages each gear as it did when new. Also the issue of not being able to start the Jeep so far has not occured.

Thanks again for pointing me in the right direction.
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post #10 of 13 Old 08-30-2009, 06:23 PM
Snydermann
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throttle valve location???

I am having the same symptoms as OrlandoTJ. Where is the Throttle Valve located? I assume it's under the hood. I have a 2003 TJ, and the above pics do not match mine.

Last edited by Snydermann; 08-30-2009 at 07:40 PM.
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post #11 of 13 Old 08-30-2009, 06:26 PM
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Quote:
Originally Posted by Jerry Bransford View Post
You're not adjusting the tranny itself, you're just adjusting the length of the shifter cable until it is the correct length so it properly engages the NSS. Once you look at the forward attach point on the transmission where the cable first attaches to it, you'll soon find the lock clip. With that released, and that clip won't come off entirely, you can just slightly move the cable fore or aft until you get the NSS so it reliably starts in Park and Neutral. It won't take much fore or aft adjustment to get it right. I knew nothing of how to make that adjustment until I installed my automatic tranny (converted from a 5-speed manual transmission) a few months ago when I HAD to and then it was easy once I actually started the job.
And this is on the tranny itself not inside at the shifter, correct?

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post #12 of 13 Old 08-30-2009, 07:14 PM
Snydermann
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Quote:
Originally Posted by OrlandoTJ View Post
Just an update, based on the above suggestions I went and checked around the cables connecting to the transmission and found that the throttle valve level was loose and I could move it up/down on its connection shaft (almost to the point of it coming off). After re-tighting the bolt holding it to the shaft, the T-shifter now engages each gear as it did when new. Also the issue of not being able to start the Jeep so far has not occured.

Thanks again for pointing me in the right direction.
I read and understand the post about adjusting the cable the runs from shifter to tranny. But, based on Orlando's update about his throttle valve level(?) being loose, I am leaning toward that being the cause of my shifting problems. My shifter assembly and plastic rod seem to be functioning properly. But my shifter has slipping issues between Drive and Neutral, it slips into neutral while driving over a bump on the road, so the shifter is not locking into "D". Also, the engine runs rough while shifting. I assume I make any throttle valve cable adjustment on the top of the engine.

I hope this makes sense

Last edited by Snydermann; 08-30-2009 at 07:59 PM.
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post #13 of 13 Old 09-05-2009, 03:17 PM
opticalwaveguy
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This link describes similar problems and fixes. I think the part that you tightened was actually the lever for the shift cable (that the TV cable also attaches to).

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