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My GQ has a big crack in the diff

Tech Talk for Nissan owners.

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Posts: 158
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My GQ has a big crack in the diff

Post by create »

I noticed a small puddle appearing under the front diff pumpkin on my GQ. I cleaned up the area and left it. When I came back the next day and had a good look I found I have a hairline crack in the weld about 50mm long. Can I drain the oil, grind back and then mig weld it?

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Post by 351ciofgrunt »

Yes this is very common, I ground out a hairline crack in my rear diff and mig welded it.
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diff crack

Post by goods »

yes you can, but it will crack again one day! best to get another housing when one comes up cheap but a weld will get you through for a while.
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Post by pinkfloyddsotm »

damn thats crazy!
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Re: diff crack

Post by familybus »

goods wrote:yes you can, but it will crack again one day! best to get another housing when one comes up cheap but a weld will get you through for a while.
why will it crack again if cleaned properly and maybe even a very tinny hole drilled in the ends of it and then welded up real good?
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Post by steveoo »

mine cracked in the same spot too. Mig welded it up about 2 months later cracked again.
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Re: diff crack

Post by big red »

familybus wrote:
goods wrote:yes you can, but it will crack again one day! best to get another housing when one comes up cheap but a weld will get you through for a while.
why will it crack again if cleaned properly and maybe even a very tinny hole drilled in the ends of it and then welded up real good?
mine had numerous cracks happen in the same spot ... 14 on one trip alone !

had it done in all sorts of ways and by professionals as well as myself ... nothing stopped it happening again.
later housings [after 92 i think] are stronger.

i would suggest bracing the housing and then welding it up.
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