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Thread: GQ Automatic gearbox Differences

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    GQ Automatic gearbox Differences

    Gidday,
    Does anyone know the differences between autos on the GQ Safari/Patrols?
    I’m looking at swapping my broken auto from my 1990 factory turbo Safari for one out of a 1996 factory turbo?
    Both trucks are TD42 T diesels.
    I’m sure my truck has had a later model turbo motor installed but not sure about the gearbox.
    Having a quick look at the gearbox’s the main wiring plug looks different? The older box has 8 wires where as the newer box has only 7.
    This wiring plug comes out of the box from above the rear of the pan on the drivers side of the gearbox.
    Any help is greatly appreciated

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    Rotaredom NissanGQ4.2's Avatar
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    Try this thread mate, sorry can't help with the plug wiring issue sorry , maybe one of the gearboxes aftermarket upgrade that required an additional wire.

    Can you get the model number of the gearboxes they should be stamped on the housing somewhere

    http://www.nissanpatrol.com.au/forum...on-Differences

    Look at post #7 day 7
    Last edited by NissanGQ4.2; 10th May 2020 at 04:55 PM.
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    Rotaredom NissanGQ4.2's Avatar
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    I know when I rebuild my auto gearbox a part I needed was different from what was sent and needed

    http://www.nissanpatrol.com.au/forum...earbox-Rebuild

    I got slack and never finish my write up
    Time is never wasted when your wasted all the time



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    Cheers for that. I’ll have a look and see if I can get the numbers.
    The boxes themselves are identical, it’s just the one plug that’s different, as well as the plugs coming off the shifters.
    Makes me wonder if the control units/computers are different also?
    Will do some more investigating and have a good read up on your rebuild thread

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    Patrol Freak jff45's Avatar
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    Might help if you post some pics. The later boxes have 8 wires: 5 for the 5 solenoids, 1 for the temp sensor & 2 for the temp switch.
    John

    2001 GUII TI 4500 - Now converted to TD42T auto with Nomad valve body

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    These are the plugs I am talking about. The last 2 photos are of the gearbox that’s in the truck at the moment, 8 wires and the 2nd photo is of the newer gearbox plug, 7 wires, and where the wires come from the gearbox. The plug and wiring exits the same place on both gearboxes.
    Also added a picture of the shifters side by side, the single plug shifter is off the newer gearbox

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    Patrol Freak jff45's Avatar
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    Looks like someone has bridged the black & white temp sensor wires. Here’s a pic showing where the wires go inside the trans.
    The 4 wires in the 2 plugs at the top of the pic go to the 4 solenoids on top of the valve body.

    You can see the black & white wires that go to the temp sensor.
    Pic is of a ‘99 TB45E trans.

    ...
    7653312B-7F18-40B6-8E7E-F20AB8B7FD9B.jpeg
    John

    2001 GUII TI 4500 - Now converted to TD42T auto with Nomad valve body

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    Would those wires being bridged allow to lock up to work sooner or is there another purpose to bridging them?
    By looking at this picture I would assume that I can plug the new gearbox in without any dramas?
    Really appreciate the help, not many transmission workshops are knowledgable on these gearboxes in my neck of the woods!!

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    Patrol Freak jff45's Avatar
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    Might have been done because of a bad temp sensor not allowing lockup.
    John

    2001 GUII TI 4500 - Now converted to TD42T auto with Nomad valve body

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