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bw1356 interior cracks

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Old Jul 16, 2015 | 12:48 PM
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bw1356 interior cracks

I have removed and disassembled the BW1356 transfer case from my 1990 F350, and the inside of the aluminum front half is covered in little spider web cracks, most especially on any outside radius. Is this normal for aluminum, or do i need another case half? The below picture is just a sample, the whole thing looks like this.
 
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Old Jul 16, 2015 | 01:10 PM
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That's from when they casted the case, nothing to worry about
 
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Old Jul 16, 2015 | 01:35 PM
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That's good to hear. I was puzzled why the back half looked in better condition despite being made of soft magnesium. The outsides are opposite, though. Outer magnesium looks like bird **** and the outside of the aluminum looks brand new. The groove that holds the oil pump looks perfect, too. Makes me wonder if anybody has ever had a pump failure with an aluminum BW1356.
 
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Old Jul 16, 2015 | 07:28 PM
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Originally Posted by ifrythings
That's from when they casted the case, nothing to worry about
Yep agreed.
 
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