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Irish law on welded diffs.

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  • 21-07-2019 10:51pm
    #1
    Lehane94
    Registered Users Posts: 1 ✭


    Anyone know the actual law or garda regulations on cars with welded diffs? Are they completely illegal or what?
    Tagged:


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    #2
    El Nacho
    Registered Users Posts: 22 ✭El Nacho


    If you look at this page by the RSA they say Permanently locking a differential by welding or other means has a dangerous effect on the handling of a vehicle , from that I would think it will fail an NCT.

    http://www.rsa.ie/Documents/Consultations/consultation%20on%20vehicle%20modifications%20-%20feb%202013.pdf


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    #3
    PsychoPete
    Registered Users Posts: 8,573 ✭✭✭PsychoPete


    Just fit a 2 way to the car


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    #4
    colm_mcm
    Registered Users Posts: 73,382 ✭✭✭✭colm_mcm


    El Nacho wrote: »
    If you look at this page by the RSA they say Permanently locking a differential by welding or other means has a dangerous effect on the handling of a vehicle , from that I would think it will fail an NCT.

    http://www.rsa.ie/Documents/Consultations/consultation%20on%20vehicle%20modifications%20-%20feb%202013.pdf

    Cars with welded diffs have passed NCTs.
    Not that that means much as they don’t test the car while it’s turning.


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    #5
    El Nacho
    Registered Users Posts: 22 ✭El Nacho


    colm_mcm wrote: »
    Cars with welded diffs have passed NCTs.
    Not that that means much as they don’t test the car while it’s turning.

    perhaps not, but they do check the brakes, surely that'd highlight trouble at the rear end if they are out of balance?


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    #6
    9935452
    Registered Users Posts: 2,749 ✭✭✭9935452


    El Nacho wrote: »
    colm_mcm wrote: »
    Cars with welded diffs have passed NCTs.
    Not that that means much as they don’t test the car while it’s turning.

    perhaps not, but they do check the brakes, surely that'd highlight trouble at the rear end if they are out of balance?

    If the diff was welded, would the balance not register as perfect?


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    #7
    El Nacho
    Registered Users Posts: 22 ✭El Nacho


    9935452 wrote: »
    If the diff was welded, would the balance not register as perfect?

    I'm not 100% sure how the NCT does it, but when I lived in the UK they tested both sides independently on the rollers.

    From my understanding if the diff isn't sufficiently opened it could be thrown out of the rollers. It happened with LSDs so I imagine it could easily happen to a welded diff.

    It would occur when the side with the worse brakes wants to slip before the harder locked side. The mismatch in braking torque across the axle would cause the skip


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    #8
    mickdw
    Registered Users Posts: 23,260 ✭✭✭✭mickdw


    Why in the name of Jesus would you want to take a welded diff yoke onto the road?


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    #9
    cruizer101
    Registered Users Posts: 3,205 ✭✭✭cruizer101


    I can't imagine you would be able to get insurance on a car with welded diff anyway


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    #10
    colm_mcm
    Registered Users Posts: 73,382 ✭✭✭✭colm_mcm


    mickdw wrote: »
    Why in the name of Jesus would you want to take a welded diff yoke onto the road?

    Because drift car


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