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Thread: GQ Automatic gearbox Differences

  1. #11
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    That seems to make sense. I’ll see what happens when I bolt it all up and go for a drive, hopefully it works a bit better than the old one!,

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  3. #12
    Rotaredom NissanGQ4.2's Avatar
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    Is the newer box out of a Safari, could it be something 2 do with one being 24v and possible the other 12v???
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  4. #13
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    Yeah new one is out of a 24v Safari, the old guy converted it to manual and sold me the auto for cheap.
    My main concern was his Safari was a 1997, guess it’s 1996 build 1997 registered, but he said this trans guy said the boxes are all the same through the GQ series

  5. #14
    Patrol Freak jff45's Avatar
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    If your current vehicle is 12v, you'll need to swap out the 24v solenoids. That means removing the valve body.
    Not a difficult job, especially with the trans out, but does require a bit of mechanical aptitude.

    You should drop the pan of the new trans anyway to wash out the gauze strainer and flush with new fluid.

    Later GQs had the larger ribbed bellhousing with bigger torque converter. I think that started with the TB42 EFIs.
    John

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

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    My truck is 24V so there shouldn’t be a problem in that sense. I’ll drop the pan and give everything a tidy up and check over before putting the new box in. Interesting about the bell housing sizes, I’ll be checking the difference once I have the boxes sitting side by side.

  8. #16
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    So after some more research it appears that I may have a non turbo automatic behind my motor.
    The gearbox currently in the truck has a non ribbed bell housing and I have been informed that a ribbed bell housing gearbox will not fit.
    So it turns out that although I have a factory black top turbo motor the ribbed bell housing turbo automatic will not fit and I need to source a non ribbed automatic, so I’m guessing my truck has had a motor swap at some stage.
    The ribbed bell housings are bigger and deeper and cause the gearbox mounts to sit roughly 70mm back.
    Would like to say thanks to all those who offered help and advice, was really appreciated.

  9. #17
    Patrol Freak jff45's Avatar
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    I have a TB45E trans with the ribbed bell housing behind a ‘96 factory turbo engine. I’m using the original TD42T flex plate with the standard TB45E torque converter.
    This is in a GU so I don’t know about the trans mounting in a GQ but the box certainly fits.
    John

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

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    That’s interesting, I am wondering if that is the case with what I have, a non turbo bell housing on a turbo gearbox.
    I’m tempted to put the box in just to see if it will fit......

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    Patrol Freak jff45's Avatar
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    I’m not aware of a “turbo” version of the RE4R03A trans for a TD42T. A stock TD42T is not a particularly powerful engine.
    John

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

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    Apparently the “turbo” version has a bigger, deeper torque converter with a couple more clutch plates and is from 93 onwards, this is what my transmission guy has told me.
    I ended up buying a rebuilt unit and put it in the truck which bolted up with no issues, well until I drove it at least.

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