E46Fanatics - View Single Post - Rear diff is toasted!!!
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Old 03-11-2011, 08:34 AM   #13
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Join Date: Aug 2009
Location: St Louis, MO
Posts: 3,008
My Ride: 01 330x-xi
I swapped all the flanges on my diff. Input/output. Not hard just take your time. Use a punch/welding marker to mark the input flange with the nut. That way you can re tighten the input flange to spec. I put a brutal 4k on my diff since then. I used a shock proof diff fluid that was recommend (name escapes me atm) Blue something iirc
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