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Thread: Troubleshooting Diff Lock Issues

  1. #11
    Expert Mike02Ti's Avatar
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    Thats the actuator. Vac solenoid is passenger side of the car up on the firewall in the engine bay.
    Most people including myself who have had issues with them have changed them out for a MAC solenoid valve.
    Mine was rusted internally and stuck the valve shut so it wouldnt engage same as yours.
    About $180 but well worth it. The locking of the diff now feels quicker to engage and disengage

    Sent from my SM-G920I using Tapatalk
    2002 GUIII Ti 4.8
    Details here

  2. The Following User Says Thank You to Mike02Ti For This Useful Post:

    Maxhead (10th April 2017)

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  4. #12
    SUCH IS LIFE Maxhead's Avatar
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    Quote Originally Posted by Yendor View Post
    It’s a bit hard to tell by the photo, what’s a bit out of shape? The whole unit where it mounts to the diff or the connection of the bottom vacuum hose.

    The bottom vacuum hose is for diff lock off. The top vacuum hose in your picture is diff lock on.
    Quote Originally Posted by Nisshead View Post
    The vac solanoid looks ing good shape, like new really

    This is the bit I'm worried about as it's a bit out of shape









    ................on the road
    It looks like its been pushed up a bit. I will take another photo froma different angle







    ...........on the road
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  5. #13
    SUCH IS LIFE Maxhead's Avatar
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    Looking for an old thread

    @Yendor






    ................on the road
    Last edited by Maxhead; 11th April 2017 at 05:12 PM.
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  6. #14
    SUCH IS LIFE Maxhead's Avatar
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    Quote Originally Posted by Mike02Ti View Post
    Thats the actuator. Vac solenoid is passenger side of the car up on the firewall in the engine bay.
    Most people including myself who have had issues with them have changed them out for a MAC solenoid valve.
    Mine was rusted internally and stuck the valve shut so it wouldnt engage same as yours.
    About $180 but well worth it. The locking of the diff now feels quicker to engage and disengage

    Sent from my SM-G920I using Tapatalk
    Do you know if they can be fixed?
    I don't mind spending a couple of hundred to get it sorted.

    I know Nissan will blame my aftermarket exhaust to be the issue...lol







    ................on the road
    ________________________
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    I don't have a short temper. I just have a quick reaction to bullshit


    WARNING: Towballs used for recoveries can, and do kill people and damage property.

  7. #15
    SUCH IS LIFE Maxhead's Avatar
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    Ok got it back in shape but no cigar, still not engaging.

    Thinking the vac solanoid could be the issue.







    ................on the road
    ________________________
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    WARNING: Towballs used for recoveries can, and do kill people and damage property.

  8. #16
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    With the engine running and the diff lock switch on you should have vacuum in that top hose only at the diff.

    When you switch the diff lock switch off you should have vacuum in the lower hose only.

  9. The Following User Says Thank You to Yendor For This Useful Post:

    Maxhead (11th April 2017)

  10. #17
    Expert Mike02Ti's Avatar
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    The stock solenoid cant be fixed. They fall to bits if you try to get inside them. Nissan could replace them if need be but i have no idea on cost.
    I have attached a few pics of my MAC valve.
    I even bent the original bracket to mount the MAC onto. Some have made their own brackets to hold them. Took about 20 mins to do including wiring the 3 wires up into the original harness.
    Its dead easy

    Part number was 45A-AC1-DDBA-1BA
    I also ordered fittings to suit with it. So you will need a breather and 3 x push type fittings if you set it up the same way as mine. I think it was 4mm line I used which I ordered 1m of it. You dont need that much but I kept it as spares and its cheap.
    I rung MAC direct and they were more than helpful and overnight bagged it to me as well.

    Sent from my SM-G920I using Tapatalk
    2002 GUIII Ti 4.8
    Details here

  11. The Following 2 Users Say Thank You to Mike02Ti For This Useful Post:

    Maxhead (20th April 2017), Patrolowner (25th January 2019)

  12. #18
    SUCH IS LIFE Maxhead's Avatar
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    Quote Originally Posted by Yendor View Post
    With the engine running and the diff lock switch on you should have vacuum in that top hose only at the diff.

    When you switch the diff lock switch off you should have vacuum in the lower hose only.
    I'll get onto this shortly







    ...........on the road
    ________________________
    ______ 2017 D-Max _______



    I don't have a short temper. I just have a quick reaction to bullshit


    WARNING: Towballs used for recoveries can, and do kill people and damage property.

  13. #19
    SUCH IS LIFE Maxhead's Avatar
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    Quote Originally Posted by Yendor View Post
    With the engine running and the diff lock switch on you should have vacuum in that top hose only at the diff.

    When you switch the diff lock switch off you should have vacuum in the lower hose only.
    Ok,

    With the engine running and locker ON there is definetly no vaccume on the top hose.

    With locker OFF there is vaccume on the bottom hose







    ................on the road
    ________________________
    ______ 2017 D-Max _______



    I don't have a short temper. I just have a quick reaction to bullshit


    WARNING: Towballs used for recoveries can, and do kill people and damage property.

  14. #20
    SUCH IS LIFE Maxhead's Avatar
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    Quote Originally Posted by Mike02Ti View Post
    The stock solenoid cant be fixed. They fall to bits if you try to get inside them. Nissan could replace them if need be but i have no idea on cost.
    I have attached a few pics of my MAC valve.
    I even bent the original bracket to mount the MAC onto. Some have made their own brackets to hold them. Took about 20 mins to do including wiring the 3 wires up into the original harness.
    Its dead easy

    Part number was 45A-AC1-DDBA-1BA
    I also ordered fittings to suit with it. So you will need a breather and 3 x push type fittings if you set it up the same way as mine. I think it was 4mm line I used which I ordered 1m of it. You dont need that much but I kept it as spares and its cheap.
    I rung MAC direct and they were more than helpful and overnight bagged it to me as well.

    Sent from my SM-G920I using Tapatalk
    Thank you so much buddy. Great help
    Quote Originally Posted by Nisshead View Post
    Ok,

    With the engine running and locker ON there is definetly no vaccume on the top hose.

    With locker OFF there is vaccume on the bottom hose







    ................on the road







    ...........on the road
    ________________________
    ______ 2017 D-Max _______



    I don't have a short temper. I just have a quick reaction to bullshit


    WARNING: Towballs used for recoveries can, and do kill people and damage property.

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