"Space Saver" spares and Posi

Discussion in 'General Automotive Tech' started by doc540, Feb 14, 2008.

  1. doc540

    doc540 New Member

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    Can anyone document with a factory link whether or not a space saver or "doughnut" spare is ok to use on my '95 Roadmaster wagon with its posi rearend?

    I've found online spec's saying both Roadmaster sedans and wagons were equipped with space saver spares, but the posi issue wasn't addressed.

    Thanks
     
    doc540, Feb 14, 2008
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  2. the Rev

    the Rev senior junior Charter Member

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    no links...just 30 years of messing in the wheel n tire world..;)

    the spares usually say on them...'do not exceed--mph'....the rims are light duty and will not take any sh-t and abuse...:D


    dats all i got:)
     
    the Rev, Feb 15, 2008
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  3. Stormin' Norman

    Stormin' Norman Well-Known Member

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    Like 30 MPH, isn't it?
     
    Stormin' Norman, Feb 15, 2008
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  4. tbirdsps

    tbirdsps New Member Charter Member

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    When you have posi-trac the owners manual stated not to use on the rear axle which would require two tire changes. Put the donut on the front and move the front tire to the rear.

    Due to the diameter difference the clutches in the posi would wear very fast. A rebuilt on the posi rear or any differential for that matter is pretty expensive.

    I don't have a reference but it's true. Either buy a full size spare or don't ever use it on the rear.
     
    tbirdsps, Feb 15, 2008
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  5. the Rev

    the Rev senior junior Charter Member

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    GOOD POINT Tbird !!!...i wasnt even thinking about the gear mix:49:
     
    the Rev, Feb 16, 2008
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  6. $arge

    $arge New Member

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    i second this motion... if one wheel is big and another small they will turn at diffetent rates.. not so good


     
    $arge, Feb 17, 2008
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