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Discussion Starter · #1 ·
wondering if anyone can tell me how to find out if the trans and diff in my 2001 z06 are original and stock parts for the car. diff part # 12561853 and trans part # 115102501. Both pieces broke and it's obvious that someone had their unskilled hands on the car before I got it.
 

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Discussion Starter · #4 ·
went to dealer and got the part numbers to replace both items and found different numbers from what is in the car. bought a new diff and the housing casting is different. the new one looks to be stronger in the area where mine broke. I wondered if the z06 might have had heavier duty units installed from the factory.
 
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