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Discussion Starter · #1 ·
Can anybody tell me about a 65 Chevy differential? I have pressure building up in my differential and I see a stem sticking out the top, is that a vent, if so how do I clean it or replace? Also I can’t seem to find the serial number where it’s supposed to be, where would it be? what I do see is embossed on case GM12 and 3856525, what is it?
 
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