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      09-19-2021, 03:46 PM   #1
BMWs4me
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BMW rear differential relisted...

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https://f10.5post.com/forums/showthread.php?t=1891443

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      09-25-2021, 04:33 PM   #2
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      09-26-2021, 02:28 PM   #3
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May I ask where you bought this or had it installed?
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      09-26-2021, 02:35 PM   #4
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May I ask where you bought this or had it installed?
I purchased it completely assembled from Birds Automotive in the UK, and had it shipped here. Very reputable company!
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      09-29-2021, 08:48 PM   #5
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I purchased it completely assembled from Birds Automotive in the UK, and had it shipped here. Very reputable company!
Very much so, this is amazing glws
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      10-04-2021, 10:55 PM   #6
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      10-05-2021, 09:07 AM   #7
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If I had tons of money I would go for this in a second!
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      10-05-2021, 09:55 AM   #8
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Running this LSD in my car now, no issues. Thats a great price!
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      10-12-2021, 07:39 PM   #9
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      10-22-2021, 04:00 PM   #10
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      10-25-2021, 03:30 PM   #11
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This is a different gearing ratio for the manual(?) I think the manual has a shorter-geared rear end. Does anyone know if there are other differences? (I.e. if I wanted this for my 6MT would it work and simply be taller geared?)

Procommuter - you say you're running this Quaife now. Generally, do you notice a significant improvement on the street? I find getting enough traction with my open diff very difficult even on the street, ESPECIALLY on wet days. And on the track is was horrible, just horrible.

I really want to ditch this open diff. But these cars' traction control is very damned heavy-handed so I worry that an LSD will even do very much for me (with the same traction control programming).
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      10-25-2021, 05:03 PM   #12
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MT cars have different gears in the rear end due to the fact they are 6spds vs. 8 spds.
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      10-25-2021, 09:11 PM   #13
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Quote:
Originally Posted by OppositeLock72 View Post
This is a different gearing ratio for the manual(?) I think the manual has a shorter-geared rear end. Does anyone know if there are other differences? (I.e. if I wanted this for my 6MT would it work and simply be taller geared?)

Procommuter - you say you're running this Quaife now. Generally, do you notice a significant improvement on the street? I find getting enough traction with my open diff very difficult even on the street, ESPECIALLY on wet days. And on the track is was horrible, just horrible.

I really want to ditch this open diff. But these cars' traction control is very damned heavy-handed so I worry that an LSD will even do very much for me (with the same traction control programming).
I had an Diffsonline LSD in my 335i and noticed a big difference in the summer, and even a bigger difference in the winter. It made the winter car control clinics a lot of fun!

RealOEM does not provide the rear differential casting numbers, so I cannot guarantee it is a direct fit swap. It does appear that the casting numbers "241681 10" on the one I have, and the BMW 33107584444 for a manual transmission that I can find online appear to be the same. I would recommend verifying the casting numbers in your car compared to the photos. If you want/need a photo from another angle, or want to verify dimensions just PM me...
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      11-05-2021, 08:41 PM   #14
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      11-16-2021, 07:41 PM   #15
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      11-23-2021, 01:00 AM   #16
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Weird, did the 8 speed auto came in 2 ratios… 2.81 and 3.08?
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      11-23-2021, 07:56 AM   #17
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Quote:
Originally Posted by 3002 tii View Post
Weird, did the 8 speed auto came in 2 ratios… 2.81 and 3.08?
Quote:
Originally Posted by 3002 tii View Post
Weird, did the 8 speed auto came in 2 ratios… 2.81 and 3.08?
On the F10 LCI 5 series platform I see that there was a 3.23 for manual, and 3.08 for the 8 speed automatic. I don't see any other offerings.

Looks like some E39 5 series came with 2.81 ratio with non Steptronic auto, as well as the M Performance LSD for F3X M240i/340i/440i Autos.

May be more, but that is I found on a quick Google search. Not an expert on this.
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      11-23-2021, 08:03 AM   #18
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Quote:
Originally Posted by BMWs4me View Post
On the F10 LCI 5 series platform I see that there was a 3.23 for manual, and 3.08 for the 8 speed automatic. I don't see any other offerings.

Looks like some E39 5 series came with 2.81 ratio with non Steptronic auto, as well as the M Performance LSD for F3X M240i/340i/440i Autos.

May be more, but that is I found on a quick Google search. Not an expert on this.
I found this on realoem but appears to be the case for the 50i N63’s

https://www.realoem.com/bmw/enUS/par...&q=33107630828
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      12-03-2021, 07:55 PM   #19
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      12-18-2021, 12:32 PM   #20
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      12-23-2021, 12:35 PM   #21
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      01-01-2022, 02:20 PM   #22
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