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Rear diff assembly swap in a 120

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  • Rear diff assembly swap in a 120

    Looking at installing a locker in the rear of my 2004 kjz120r with the 1kz-te,

    I see that the rear diff in a 150 series is a bit tougher and comes with a factory locker. I've heard they bolt right up in a 120, wondering if there's anything I need to be aware of regarding models of 150/120 and different diff ratios. i believe mine is currently 3.909 and the 150 diff is 4.01, if this is a deal breaker or do i need to swap the front diff as well?
    Similarly, does anyone know of any issues with brakes lining up/plumbing up?

    Struggling to find any reliable info so any help would be appreciated.

    Cheers

  • #2
    You will need to match front and rear ratios in diffs or you will be winding up the trans.

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