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Thread: W58 Version Comparisons

  1. #31
    Junior Member Grease Monkey
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    Default Re: W58 Version Comparisons

    The steel plate type is definitely stronger from personal experience, sure we can argue each box has been treated differently etc etc but until someone buys 2 brand new NOS boxes, builds a test rig that runs them for 200000km at various loads I think the best we can go off is experience. My personal experience with 55's is they break easily. 58's (steel sw) have lasted much longer. The steel plate could be an indication of other internal changes also. Even 1.5" of alloy will flex somewhat (someone wanna do the math?) and even small flex when it comes to gear mesh can cause big problems.

  2. #32
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    Default Re: W58 Version Comparisons

    I have a box out of a 98 2wd hilux work mate with the fuel injected 2 litre.it has the steel plate in the middle.any body know what box it is?
    cheers, Alan.

  3. #33
    Toymods Club Member Conversion King big_zop's Avatar
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    Default Re: W58 Version Comparisons

    If you pulled it out of the original vehicle, then it will be on the build plate (thanks Norbie for the pic)



    The basic layout is the same for similar years. This is from an Aristo and second from the bottom you have "Trans/Axle A340E A01A". In place of the A340E, you should have your transmission code and it will say what the original gearbox is.

    More than likely being in a hilux it will have different ratios suited to towing. And if it is the original gearbox, searching either here or elsewhere would be able to tell you what you should find.

  4. #34
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    Default Re: W58 Version Comparisons

    Thanks for that Big Zop, it has G54 for the trans code, so what would that be?
    Cheers, Alan.

  5. #35
    Toymods Club Member Conversion King big_zop's Avatar
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    Default Re: W58 Version Comparisons

    Not too familiar with Hilux's, so you are going to have to look around for that answer.

  6. #36
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    Default Re: W58 Version Comparisons

    Quote Originally Posted by hemi twofifteen turbo
    The steel plate type is definitely stronger from personal experience, sure we can argue each box has been treated differently etc etc

    Even 1.5" of alloy will flex somewhat (someone wanna do the math?) and even small flex when it comes to gear mesh can cause big problems.
    I don't think the steel plate version is any stronger at all, infact its got nothing to do with what the plate is made from thats causing them to break.

    majority of ppl are stripping teeth off the input shafts, this is caused by the front layshaft bearing or input shaft bearing collapsing or wearing to the point where they seperate enough to chip the teeth off, this is obviously in a completely different area to the sandwich thus i dont think the plate material is the problem.

    im about to tear one down to have a good look at what can be done to increase the strength in the front of the box but ill post up my findings then.

    cheers
    linden
    Quote Originally Posted by WHITCHY
    Prefer someone around the Sydney area but will travel a few hours for a good box!

  7. #37
    AVGAS DRINKING Carport Converter 30psi 4agte's Avatar
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    Default Re: W58 Version Comparisons

    I tend to agree with you linden.......i mean it makes sense really. I dont think the sandwitch plate had anything to do with the boxes strength. There could be some flex issue but im doubting it.

    When i break mine it will be straight cut gear set

  8. #38
    As dodgy as a Backyard Mechanic GT1978's Avatar
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    Default Re: W58 Version Comparisons

    Quote Originally Posted by 30psi 4agte
    I tend to agree with you linden.......i mean it makes sense really. I dont think the sandwitch plate had anything to do with the boxes strength. There could be some flex issue but im doubting it.

    When i break mine it will be straight cut gear set
    Aren't straight cut gears weaker being that they take the load on a smaller surface area? I thought the only benefit of straight cut gears is reduced drivetrain losses again due to the reduced surface area of contact between the gears?


    Glen
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  9. #39
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    Default Re: W58 Version Comparisons

    Quote Originally Posted by GT1978
    Aren't straight cut gears weaker being that they take the load on a smaller surface area? I thought the only benefit of straight cut gears is reduced drivetrain losses again due to the reduced surface area of contact between the gears?


    Glen
    correct on the first bit, yes they are weaker but only in the teeth engagement.

    the second part is half correct, its not frictional losses from the teeth but the fact that the layshaft and mainshaft are trying to push different directions and load up the thrust bearings during acceleration and deceleration due to the helical cut on the gear.

    cheers
    linden
    Quote Originally Posted by WHITCHY
    Prefer someone around the Sydney area but will travel a few hours for a good box!

  10. #40
    Is a Chief Engine Builder wilbo666's Avatar
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    Default Re: W58 Version Comparisons

    Herringbone gearset FTW

    Cheers
    Wilbo
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  11. #41
    Learner Driver Backyard Mechanic
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    Default Re: W58 Version Comparisons

    Quote Originally Posted by wilbo666
    Herringbone gearset FTW

    Cheers
    Wilbo

    Is that a brand? got a link or a webite?
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  12. #42
    Toymods Club Member Conversion King big_zop's Avatar
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    Default Re: W58 Version Comparisons

    No, its a type of gear (like a V instead of a straight line).

    He was having a dig because noone makes it but would be the best of both worlds - the load carrying capacity of a helical along with no thrust loads of the straight cut. But cost more than both.

    Herringbone -

  13. #43
    Building Corollas Chief Engine Builder Cuzzo's Avatar
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    Default Re: W58 Version Comparisons

    Quote Originally Posted by AL510
    Thanks for that Big Zop, it has G54 for the trans code, so what would that be?
    Cheers, Alan.
    That code is the diff.

    You want to find W5*
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  14. #44
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    Default Re: W58 Version Comparisons

    I wasn't saying the steel sandwitch type was stronger due completely to the steel plate, -- but only in my experience the steel plate type has lasted longer. The steel plate could be a visual indicator of other internal differences. Has anyone noticed a difference in strength between the steel and non steel boxes, as I believe I have? All the 'heavy duty' boxes seem to have them? I've only ever broken gear teeth also. As for the teeth stripping (don't take this as pushing the flex argument too much) but flex = bearing side loading = more stress on bearings = accelerated bearing wear = gear teeth stripping?
    Last edited by hemi twofifteen turbo; 26-03-2009 at 09:04 PM.

  15. #45
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    Default Re: W58 Version Comparisons

    Quote Originally Posted by cuzzo
    That code is the diff.

    You want to find W5*
    Actually cuzzo it is a gearbox code. used in 4wds generally.

    if it was a diff code it would have 3 numbers ie G342 etc
    Quote Originally Posted by WHITCHY
    Prefer someone around the Sydney area but will travel a few hours for a good box!

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