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NZ_M3 · 09-09-2017, 09:30 AM

In contrast to the other E46 M3 differential pictured below

Which carried the GKN part number GKN-V-405251 as opposed to the CSL/Z4M one which is GKN-V-406953.

My understanding however is the differential was updated in and around 2002 till 2015 with this new variant, but with the older one still in productiontill 2005 so it was a mixed bag of which one you got.

I believe but I can't confirm if you bought the new 481 part number differential now it'll be the CSL/Z4 one with GKN-V-406952 LSD

I also believe that if you cut one open the internal clutch are the same between both, it was just a casing change to manage lubrication issues with early diff groans and complaints.

IMG_4275.jpg

IMG_4274.jpg

IMG_4277.jpg

IMG_4276.jpg

09-09-2017, 09:30 AM	#6
NZ_M3 S5, Sport On, DSC M-track Join Date: Jun 2008 Location: Auckland, New Zealand Posts: 1,434 Casino cash: $13579	In contrast to the other E46 M3 differential pictured below Which carried the GKN part number GKN-V-405251 as opposed to the CSL/Z4M one which is GKN-V-406953. My understanding however is the differential was updated in and around 2002 till 2015 with this new variant, but with the older one still in productiontill 2005 so it was a mixed bag of which one you got. I believe but I can't confirm if you bought the new 481 part number differential now it'll be the CSL/Z4 one with GKN-V-406952 LSD I also believe that if you cut one open the internal clutch are the same between both, it was just a casing change to manage lubrication issues with early diff groans and complaints. IMG_4275.jpg IMG_4274.jpg IMG_4277.jpg IMG_4276.jpg Last edited by NZ_M3; 09-09-2017 at 09:42 AM.