Seeing as I dont know any BMW sites and its not for my car anyway I thought Id ask you lot. I know theres a couple of you with them on here

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My mate has lost 2nd gear in his E36 325i and is looking for a replacement box for it. Are the gearboxes model specific or will any of the 6 cylinder gearboxes from 3 and 5 series of the past fit?
Cheers folks.