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Hi, new to the bm seen.. And am currently at the very early stages of building a e36 m3 drift car... I know this has been done to death but just checking.... I planning on selling my current LSD unit and replacing with a welded one... I'm looking for something a long the lines of 3:9 or 4:1... I know I can get a 188mm cwp off eBay....but looking to know what other model 3 Series can i get the diff from, i know ther are different size casing... And will it bolt straight in??... Or will I be changing shafts&prop too?? Any advise be greatly appreciated thanks
 

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E30 325 has a 3.91 diff in a 188 cwp. Early e34 autos had a 4.4 in a 188 cwp. Both would need to be put into an e36 case.
 

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Thanks for info....could I just pick up a standard e36 open diff, fit a cwp from e bay...weld her up and drop it in and off I go..? That's wat I was thinking of doing
 

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Need complete cwp and differential unit from donor ratio diff snd then fit that to an E36 casing.

Just the cwp won't work as the crownwheel offsets are different.
 

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Will the casings from 323.. 325..328 just bolt straight in the my subframe and I can just use the shafts and prob I have then!!
 

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Will the casings from 323.. 325..328 just bolt straight in the my subframe and I can just use the shafts and prob I have then!!
Yep, straight fit.

I'd be interested in your diff too as need a 3.15cwp and LSD unit for a customers E30 and need a E36 casing an M3 output flanges for making my own 4.4 for my Evo.
 
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