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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Decided to fit a M3 diff



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      09-19-2013, 01:54 PM   #309
Malexander
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Quote:
Originally Posted by Drawn05 View Post
I have the M3 rear on my FBO 135i and I am also 6AT. Going taller than stock sounds silly to me. I have the 3.85 of the manual M3 and it is perfect.
Hi!

Just wanted to ask you about your rear diff. Did you use the m3 diff with sideshaft?

Did you only change the cv joint to m3 or did you used the whole shaft?
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      09-20-2013, 06:34 AM   #310
Rob S.
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I am sorry for the topic hijack but i dont know where else to ask it.

I can buy a ''complete'' M3 DKG rear (about 60k) for a very good price. You can see the picture in my attachement.

Can someone take a look at it and tell me what other parts i will need to make the swap complete?

Thanks.
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      09-20-2013, 06:47 AM   #311
RimasRS
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Quote:
Originally Posted by Rob S. View Post
I am sorry for the topic hijack but i dont know where else to ask it.

I can buy a ''complete'' M3 DKG rear (about 60k) for a very good price. You can see the picture in my attachement.

Can someone take a look at it and tell me what other parts i will need to make the swap complete?

Thanks.
Take everything if you can, subframe with bushings and rods nice suspension upgrade. But for diff you need sideshafts, diff, and prop shaft which is not on the picture. Prop shaft has to be shortened and welded with your current prop shaft and balanced.
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      09-20-2013, 06:54 AM   #312
Rob S.
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So i would only need to buy a prop shaft, correct?
I can buy the whole thing for about 600 dollar.
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      09-20-2013, 07:02 AM   #313
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I suggest you to read the whole thread to get an idea to what you are doing. The price is very good for all those parts which you are getting.

Quote:
Originally Posted by Rob S. View Post
So i would only need to buy a prop shaft, correct?
I can buy the whole thing for about 600 dollar.
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      02-21-2014, 10:57 AM   #314
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what would this m3 diff conversion cost with used parts? and labour costs?
what is a good price for the parts?
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      02-21-2014, 08:14 PM   #315
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what would this m3 diff conversion cost with used parts? and labour costs?
what is a good price for the parts?
$2000 in parts plus whatever local labor rate is...
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      02-21-2014, 08:20 PM   #316
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+ the cost of rebuilding the M3 diff since the M owners are having to do rebuilds at 60-80 thousand miles. Just buy a quaife, wavetrack or OS giken
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      02-22-2014, 12:03 PM   #317
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Rear axle complete 800
But that's where the conversion can lead you down a rabbit hole

I replaced brakes suspension brake lines and the bill depends on you taste

Labour for me was 800 but I lent a hand
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      05-20-2014, 02:51 PM   #318
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I see a lot of posts referring to the 335i Auto prop shaft but I have a Manual 6 speed trans in my e92 335i. RealOEM shows my propshaft being 1471 / 1472mm in length and the Automatic Trans 335i having a 1472mm length propshaft.

The reason I ask is that I have already bought the M3 propshaft and wanted to know if I must buy an Auto 335i propshaft also or if my current propshaft on the car now will work to do the joining of the two M3 and 335i propshafts?

Also, just so I am clear. With regards to the rear axles/driveshafts going out to the tires from the M3 diff. If I were to only replace my diff with an M3 diff then I would need the longer (according to realoem) M3 driveshafts going out to the 335i hub assemblies and even though the M3 shafts are longer they will fit into my hubs?

Thanks!
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      05-20-2014, 03:13 PM   #319
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Quote:
Originally Posted by vertigo44 View Post
I see a lot of posts referring to the 335i Auto prop shaft but I have a Manual 6 speed trans in my e92 335i. RealOEM shows my propshaft being 1471 / 1472mm in length and the Automatic Trans 335i having a 1472mm length propshaft.

The reason I ask is that I have already bought the M3 propshaft and wanted to know if I must buy an Auto 335i propshaft also or if my current propshaft on the car now will work to do the joining of the two M3 and 335i propshafts?

Also, just so I am clear. With regards to the rear axles/driveshafts going out to the tires from the M3 diff. If I were to only replace my diff with an M3 diff then I would need the longer (according to realoem) M3 driveshafts going out to the 335i hub assemblies and even though the M3 shafts are longer they will fit into my hubs?

Thanks!
Pretty sure you need to use the m3 axles with the 335 outer portion where it mates with the hub. Don't quote me on that, but I'm pretty sure that's what you have to do.
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