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Old 06-28-2018, 07:34 PM
Oldnek Oldnek is offline
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Join Date: Mar 2011
Location: Ulladulla, Australia
Posts: 1,346
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I actually had this same problem today, welding brackets to a old diff housing.
After I welded and ground smooth there were craters, so I drilled those out and tried welding again, only to be in the same situation, so my issue appears to be contamination, from Diff oils and impregnated corrosion on the housing.
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EK Holden V8
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