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Diff Pinion Flange Dropped Off

Discussion in 'Defender 90 / 110 / 130' started by Oldseadog, May 9, 2019.

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  1. Oldseadog

    Oldseadog Well-Known Member

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    DSC00195.JPG DSC00194.JPG DSC00179.JPG DSC00179.JPG DSC00191.JPG Apparently, the split pin was so corroded that it fell out of both the castellated nut and the pinion, which stripped the threads out of the nut.
    The two remnants of the split pin show no signs of corrosion, and the only bits to be found were the ends of the 'legs, with the 'bulb' part and the legs through the pinion missing.
    Can anyone recommend an independent engineer/metallurgist to give a professional, unbiased opinion?
    DSC00191.JPG
     
  2. TorsionBhudda

    TorsionBhudda Well-Known Member

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    Looks to me like that nut was already stripped when fitted and has pulled of the pinion shaft threads as they aren't damaged. I'd have expected both the nut and shaft threads to be stripped if the pinion flange dropped off. Who says that the split pin failed?
     
  3. jamesmartin

    jamesmartin Well-Known Member

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    split pin condition is irrelevant,nut hasnt just undone due to split pin failing.that nuts been over tightened or props slide is seized and its been pulled off slide hammer style over a little time
     
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  4. Oldseadog

    Oldseadog Well-Known Member

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    Thanks for that @jamesmartin. I hadn't considered that possibility!
    They have had the propshaft off to change the gearbox, and would surely have noticed had it been siezed either when removing or refitting it!
    Had the propshaft siezed earlier, the only other time it was off was during the chassis change, a couple of thousand miles ago, when noting amiss was noticed either.
    Is this down to incompetence on their part, I wonder??
     
  5. tottot

    tottot Well-Known Member

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    I also think a duff already damaged nut was fitted at some time and things only came apart when the split pin gave up having taken a battering for some time from the loose nut.
     
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  6. Scooby22

    Scooby22 Well-Known Member

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    Often spit pins ars reused which weakens them having being bent then straightened then rebent, and if this has been done twice or more the split pin could easily snap, looking at the photo of the remains of the spit pin it looks like this is what has happened. They should really only be used once then discarded.
    The nut may also have had a damaged thread when put back on.
     
    Last edited: May 10, 2019
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  7. Oldseadog

    Oldseadog Well-Known Member

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    It would appear that our Guru, Sir @jamesmartin is quite correct, as I went down and took a few more pics yesterday, and sure enough, the propshaft was siezed up solid!
    As I have only done a few hundred miles since getting her back from a gear and transfer box rebuild (by Ashcrofts,) is it possible for the shaft to sieze up in such a short time, or would it be quite obvious to whoever removed and refitted it that something was not quite right with it, making it difficult to replace?
    Historically, both of the propshafts tended to be greased annually, which is why am am amazed that he front one was siezed, unless overtightening the collar might have had any affect on it?
    Would the garage be responsible under a duty of care to inform me that the shaft was siezed solid?
    The half shafts didn't asppear to be too badly damaged, and I think that that can be mainly attributed to wear.
    A couple of further pics to be going on with, and your views and comments would be very much appreciated. DSC00200.JPG DSC00201.JPG DSC00202.JPG DSC00205.JPG DSC00206.JPG ...
     
    Last edited: May 12, 2019
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  8. tottot

    tottot Well-Known Member

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    That the diff pinion threads escaped with no visible damage is interesting, guess it is a lot harder than the nut. Halfshaft wear looks normal.
     
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  9. Oldseadog

    Oldseadog Well-Known Member

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    I have arranged for an independent inspection of the propshaft and diff as per the garages' suggestion, and now they suddenly say that 'it's not convenient' because, even though the premises will still be open, their Ops Director is on holiday!
    Can they refuse access?
     
  10. tottot

    tottot Well-Known Member

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    Do not see why you and anyone you want can not go and take a look. It is your truck after all .
     
  11. Oldseadog

    Oldseadog Well-Known Member

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    I assume that they want access to the inspector without him having any chance of discussing the issues with me first, thus allowing them to present their excuses uncontested.
     
  12. border

    border Well-Known Member

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    Which Axle is it Mate ? Ive got a coupe of decent half shafts, if there the same your welcome to them.
     
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