Neutral Safety Switch Adjustment

Discussion in 'Troubleshooting & Diagnosis' started by Sweet76, Aug 10, 2011.

  1. Sweet76

    Sweet76 Veteran Member

    101
    0
    Sep 20, 2006
    Appomattox, VA
    I posted the other night about the location of this switch. I crawled under the dash and found it. Removed the 1/4 inch bolts and the two wires...easy enough. I installed the new one. Adjusted it back and fourth until the car started in Park and the back-up lights came on in Reverse...I thought all was well but it's also starting in Drive...never did this before. I almost hit the shop wall with the drivers door !!...I adjusted the switch several more times with the same results..starting in drive...I also went under the car and tried adjusting the rod running up to it...same deal...starting in drive...the switch that I got from NAPA has some extra wire terminals on it. The original only has four but this one has like 8 terminals...When I questioned this he said that this is a "generic" switch but should work fine. Ive been dealing with this NAPA store for years and this guy is a pretty sharp cookie but after 2 nights of adjusting this entire mechanism and the car still starting in drive I have to wonder if I got the wrong switch...Any ideas, suggestions or advice would surely be appreciated.
     
  2. Twisted_Metal

    Twisted_Metal Moderator Staff Member Lifetime Gold Member

    24,835
    166
    Feb 26, 2004
    Bloomington, MN
    Mine does the same thing. I've never been able to find the sweet spot in the adjustment of all the parts. :mad:
    (Cable adjustment, back drive linkage and NSS switch.)

    Maybe I just lack patience in getting it adjusted properly. :screwup: )

    It's a nice evening... I think I'll give it another shot.
     
  3. Sweet76

    Sweet76 Veteran Member

    101
    0
    Sep 20, 2006
    Appomattox, VA
    Thanks Twisted, I just don't like the idea of my car starting in "drive" !!
     
  4. Twisted_Metal

    Twisted_Metal Moderator Staff Member Lifetime Gold Member

    24,835
    166
    Feb 26, 2004
    Bloomington, MN
    Dammit... I just wasted two hours trying to get it right.
    It's so close but I still can't make it hit 2nd with the slap shifter. (From 1st to 2nd.) :mad:

    And it still starts in OD too. :(
    (ShiftWorks kit on a stock shifter with a 200-4R.)

    I may have to tweak the bracket to get the gears right.
     
  5. hogg

    hogg Veteran Member

    2,977
    16
    Dec 29, 2000
    pegram,tn.,cheatam
    Did you try to adjust the pointer a string atached to the colum with a screw,or check for slack in the rods under the hood
     
  6. frank5s

    frank5s Veteran Member

    133
    1
    Sep 6, 2008
    Naperville Il
    try googling the number off the old switch if you still have it. Also Rock auto shows several different switch one might be better than a generic
     
  7. Sweet76

    Sweet76 Veteran Member

    101
    0
    Sep 20, 2006
    Appomattox, VA
    Im thinking that there may be some slack somewhere. It's the original stuff so its 35 years old. I noticed that it don't take much to throw it off. Im also going to search for another switch.

    Thanks for your input.
     
  8. Gary S

    Gary S Administrator Lifetime Gold Member

    20,140
    66
    Apr 14, 1999
    Bismarck, North Dakota
    Have you tried adjusting your old switch? If it is the original GM switch, there is a good chance it will align better than the replacements.
     
  9. Sweet76

    Sweet76 Veteran Member

    101
    0
    Sep 20, 2006
    Appomattox, VA
    I havent tried that Gary. I beleive that there was nothing wrong with the original switch now. Could it be that from having the transmission out a couple of times that the mechanism just simply got out of adjustment ?? Im considering putting the old switch back in like you said and trying it again. The NAPA generic switch has like 6 terminals and my original has only 4 so I can see were your coming from.

    Thanks again for all your help.
     
  10. oledave60

    oledave60 Veteran Member

    804
    0
    Jan 28, 2009
    E. Texas
    The switch on my 73 had 6 spades. The extra two were for the seat belt wires. I am not using them and it doesen't effect the starting.
     

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