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  #1  
Old 08-17-2013, 03:14 PM
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Join Date: Jul 2011
Posts: 396
300ce upgraded to c36, need differential suggestions

I have a 300ce that I plan of upgrading to a c36 engine.
I was wondering what would be a good differential to use.
Currenly I have a 2.65 without asr. I know it is a matter of preference, but what would be a good medium? I have a 3.27 differential in the garage.

Also I have an e320 coupe that I might swap the c36 engine instead. This e320 coupe does have asr. What differential should I use in this car? Where would I source a differential with asr? Which years and models should I be looking to source one from.

Another side note. I have two 5 speed transmissions that I could put in either of these cars. I have one out of a 1986 300e (5 speed overdrive) and I have a Getrag from the16V cosworth. If I did the c36 engine swap, what would be the prefered transmission and dieferential.

Keep in mind that I don't drive in racer mode, but I would like to have something peppy off the line. I probably never drive over 85 MPH.

Thanks. All your input is greatly appreciated as I plan to build a dream coupe.

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  #2  
Old 08-17-2013, 07:18 PM
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Join Date: Dec 2011
Location: Norwalk, CT
Posts: 236
I have a C36 engine swapped into a w124 wagon. I have the parts needed to go the getrag swap. I am planning on using the stock 2.65 rear end as the getrag does not have an overdrive and therefore would be the same on the highway with the 4 speed auto.

If you use the 300e overdrive unit a 3.07 rear end would be a nice option. Here is a good chart for all the w124 gear ratios:

http://www.w124performance.com/docs/mb/other/differentials.pdf
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  #3  
Old 08-17-2013, 09:23 PM
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Join Date: Sep 2007
Location: ohio
Posts: 159
i've got a hard to find 3.64 gear 124 diff, used on euro 200d 5 speeds

make it a fun stop light to stop light beast


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  #4  
Old 08-17-2013, 10:09 PM
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Join Date: Dec 2011
Location: Norwalk, CT
Posts: 236
That is probably the smaller sized diff. The later coupes used the 210mm diff.

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