which do i have?

[new2bmw]

i have gone on real oem and bmwfans and am trying to figure out what differential i have? Can somebody go on and read it and explain to me which i have? here is the links to the differential from my car on both sites. Mine is an automatic (for now)

realoem

http://www.realoem.com/bmw/showparts.do?model=1084&mospid=47302&btnr=33_0014&hg=33&fg=05

bmw fans

http://bmwfans.info/parts/catalog/E30/2-doors/USA/318i-M10/LHD/A/1983/november/browse/rear_axle/rear_axle_drive/

[LivingLegend06]

Just go under your car and look at it. There is a little tag that has all the info you need.

[bzboardz]

read the tag on the diff

[geezerman402]

S means LSD, the next three numbers is the ratio. FYI.

[matias88e30]

^^ Just do what they said and you'll be fine