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Welded diff...Stainless Rod???

Discussion in '40- & 55-Series Tech' started by xjnation, Aug 3, 2005.

  1. xjnation

    xjnation

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    I was once told by a metallurgist that welding a diff with a stainless welding rod is the best way to go. Any experience with this. I believe he said it better because of low iron content. Its been a while... I have the SS rods so eventually I'll try it, unless someone knows why I shouldn't. Any ideas??? :confused:
     
  2. woody

    woody unhelpful spotter Staff Member Admin

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    I didn't....mine has been thrashed for a couple years with zero problems....heck, welded up another just for fun this week, and to have for a spare.

    See my writeup in the tech links, follow those instructions, call it good.
     
  3. Mark W

    Mark W

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    I would tend to agree. How you weld it will have much much much more impact than the rod you use.


    Mark...
     
  4. Isotel

    Isotel

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    Woodys Method works Great for me Too!!
     
  5. brian

    brian SILVER Star

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    if tig.ing sure go for it, if using a stick machine pass. using a stick machine, might as well just use either 7018 or 10018.
     
  6. andrewfarmer

    andrewfarmer

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    I prefer going to a foundry and filling the centre with aluminium. Being slightly softer it absorbs a little of the shock loading - can be enough to save an axle :)
     
  7. clemson55

    clemson55

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    Just follow woody's tech and you'll be fine. Good penetration in the weld is more important then the rod type you use anyway.
     
  8. Pin_Head

    Pin_Head

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    SS rod has a high nickle content and the rationale for using it on iron or steel is because it tolerates high amounts of carbon (like in high carbon steel or cast iron) without the risk of brittle iron carbides precipitating in the fusion zone. Nickle mixes ideally with both iron and carbon. The rational doesn't hold up for gears, because they are made of 8620 alloy and are surface (case) hardened. Other than the surface hardening that is only about .010 deep, there isn't enough carbon in 8620 (.2%) to worry about.

    While SS or nickle rod would be fine, so would just about any other rod.
     
  9. haystax

    haystax

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    I used some stuff called Eutectic? or something - blue flux coating and gold colored rod, may have been SS rod but I'm not sure, my neighbor lent it to me for the project.

    For the dude who filled the diff with aluminum - how the F did you get the clips in the axles after it was filled - not too many FF rear ends around this part of the globe.
     
  10. andrewfarmer

    andrewfarmer

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    Fair enough - in this part of the world they're common, and an essential upgrade if doing hard wheeling :)
     
  11. bad_religion_au

    bad_religion_au

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    what sort of $$$ are we talking for the aluminium fill... my bro's lookin at welding up his diff but if this is an effective method (also FF).... welll
     
  12. PUPTLAM

    PUPTLAM

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    Dont hold me to this but I believe 6011 rod is the norm for welding diffs with an arc welder. has something to do with the grease and oil soaked into the metal. The 6011 is good for welding dirty metal. Something I read in off road magazine, and i cant find the article.
    All i know is whatever the base metal is in the gears is what you want to weld them with. Stainless is great for not being a disimilar metal or galvanic corrosion problem but it will still add to a cyclic corrosion problem faster than a mild steel to mild steel application.
     
  13. andrewfarmer

    andrewfarmer

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    you'll need to price it at a foundry near you.... :)

    you'll need to pull the centre, remove the side bearings, and take some axles with you - you fit these to prevent al getting in the splines - push them in as far as you can.
     
  14. xjnation

    xjnation

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    Good info, everyone. Thanks .
     
  15. Trollhole

    Trollhole THC Supporting Vendor Moderator

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    Ok I need a pic of this.

    How in the heck do you get the c-clips back in?

    And if you mean only on a Full Floater then you need to state that. Someone will read this and go do it with a c-clip diff and be screwed.
     
  16. Isotel

    Isotel

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    they are talking about a FF Axle -- dosent require C clips
     
  17. bad_religion_au

    bad_religion_au

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    and if your silly enough to do a mod without researching the implications, well their silly...