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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N57 / M57 Turbo Diesel Discussions - 335d > New LSD Option for our 335d?



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      02-05-2014, 04:12 PM   #1
GreekboyD
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2009 BMW 335d  [3.75]
New LSD Option for our 335d?

Check out this thread and specifically post #36:

Link

Any volunteers?
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      02-05-2014, 04:40 PM   #2
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are they trying to open a shop in the US? If not, I doubt it will be any cheaper than the US based service. Anything other than sending it on a boat and waving goodbye for a couple months will probably cost the entire difference between a reputable unit and this untested unit. With the welded diff that we have I honestly think that the prices we have for LSDs are pretty fair, anything significantly cheaper would be suspect IMO

That said, if they can make a good unit for a bunch cheaper then
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      02-05-2014, 04:43 PM   #3
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Quote:
Originally Posted by Hoooper View Post
are they trying to open a shop in the US? If not, I doubt it will be any cheaper than the US based service. Anything other than sending it on a boat and waving goodbye for a couple months will probably cost the entire difference between a reputable unit and this untested unit. With the welded diff that we have I honestly think that the prices we have for LSDs are pretty fair, anything significantly cheaper would be suspect IMO

That said, if they can make a good unit for a bunch cheaper then
I agree. There was mention of them also having a California shop in that thread I believe.

EDIT: Looks like I found the Cali address:

Contact Us (Click here to email us)
MFactory R&D (Synchrotech®)
581 W. Covina Blvd
San Dimas, CA 91773
USA
Tel: +1 909-592-5933
Fax: +1 213-455-2613


(Research & Development Facility / US Sales & Logistics)

Last edited by GreekboyD; 02-05-2014 at 04:57 PM.
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      02-06-2014, 02:48 AM   #4
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We are a US business, with our R&D Facility in San Dimas, CA.

All of our products are designed & developed in the USA, with manufacturing done both in the US and our TW facilities. All items are manufactured in-house; we do not outsource the production.
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      02-06-2014, 05:47 AM   #5
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Price please!!
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      02-06-2014, 05:43 PM   #6
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Hooper, are you anywhere close to this place?

I'm starting to play with the idea of this kind of modification. At this point I'm strongly considering the Quaife. But if someone from Team D is close to this facility ...
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      02-06-2014, 06:17 PM   #7
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Quote:
Originally Posted by TDIwyse View Post
Hooper, are you anywhere close to this place?

I'm starting to play with the idea of this kind of modification. At this point I'm strongly considering the Quaife. But if someone from Team D is close to this facility ...
not real close for me. probably 6-7 hours. I think there are a handful of guys on here closer to them than I am. I dont do enough hard/track driving to justify something in this range but it is still interesting to me.
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      02-06-2014, 07:57 PM   #8
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The LSD modification for me was most apparent in two places:
1. The day I drove it home it was raining, and it made spirited cornering in the rain noticeably different.
2. At the track, coming out of the corners and stomping on it was more forgiving.

But, now that I have had it installed for almost a year (in March), I hardly notice it unless I think about it when I get the much more rare yellow light when the DSC has intervened. After a time it just becomes part of the car behaving the way a proper BMW should.
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      02-06-2014, 08:36 PM   #9
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Thanks for the feedback.

Do you have any details about your installation posted somewhere? Or could you describe if you did the install yourself, have someone else do it, and how much it cost?
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      02-06-2014, 08:41 PM   #10
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Quote:
Originally Posted by TDIwyse View Post
Thanks for the feedback.

Do you have any details about your installation posted somewhere? Or could you describe if you did the install yourself, have someone else do it, and how much it cost?
335dFan went to VAC for his Quaife. This will give you an idea:

Link
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      02-06-2014, 09:27 PM   #11
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Quote:
Originally Posted by TDIwyse View Post
Thanks for the feedback.

Do you have any details about your installation posted somewhere? Or could you describe if you did the install yourself, have someone else do it, and how much it cost?
GreekBoyD's link says everything I would say. I might be able to find one more link for you to look at.

http://www.e90post.com/forums/showthread.php?t=817922
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      02-06-2014, 09:40 PM   #12
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Thanks for the links. Having read through them I didn't quite find what I was looking for. So I'll ask it specifically:

If you buy a pre-packaged "pumpkin" like the below example

http://store.vacmotorsports.com/vac-...als-p2763.aspx

... is the removal/installation of the "pumpkin" a DIY job? Or is there special tools/knowledge needed for proper installation that makes this not a DIY weekend job?
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      02-06-2014, 10:14 PM   #13
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for our cars it is not a straight drop in feature. With VAC it requires machining/welding, then the price out the door with them it makes no sense to me. If this new one would be different (easier to install) and cheaper I will probably consider it in the future.
Not close to San Dimas, but in So Cal area.
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      02-06-2014, 10:19 PM   #14
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Quote:
Originally Posted by TDIwyse View Post
Thanks for the links. Having read through them I didn't quite find what I was looking for. So I'll ask it specifically:

If you buy a pre-packaged "pumpkin" like the below example

http://store.vacmotorsports.com/vac-...als-p2763.aspx

... is the removal/installation of the "pumpkin" a DIY job? Or is there special tools/knowledge needed for proper installation that makes this not a DIY weekend job?
I think a guy like you could easily make it a DIY type of job. Measuring the backlash might be the toughest part IMO. Here is an example of an LSD DIY:

Link

Last edited by GreekboyD; 02-06-2014 at 10:40 PM.
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      02-06-2014, 10:35 PM   #15
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Quote:
Originally Posted by GreekboyD View Post
Measuring the backlash might be the toughest part IMO. Here is an example of an LSD DIY:

Link
Thanks. I followed the link and there's only 2 posts, neither of which are about an LSD. Was this the link you intended to post?

I'll try doing some searches on differential installs and backlash in the meantime. I would be interested in any good DIY links for this kind of install though.
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      02-06-2014, 10:41 PM   #16
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Sorry TDI. I fixed my link.

Here's another helpful one:

Link

Last edited by GreekboyD; 02-06-2014 at 10:51 PM.
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      02-06-2014, 11:08 PM   #17
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Thanks.

I just finished reading this thread:

http://www.e90post.com/forums/showthread.php?t=513544

Pertinent parts for the LSD "pumpkin" removal/install seem to be:
.
.
.
9. Disconnect Axle Shafts, using parking brake to hold from spinning while braking bolts loose. Support Axles with wire or hanger.
10. Disconnect Drive Shaft, require a special thin 50 mm wrench which AR Design makes and can be purchased from Harold at HP Autowerks. Need to turn clockwise to loosen.
11. Support Diff with Jack, Strongly suggest using a trans jack.
12. Remove 3 bolts holding diff in, Right Frt bolt has exhaust hanger with nut that must be removed if not removed with exhaust.
13. Lower diff slightly, pull backwards to disengage the drive shaft spline and lower completely and set aside. Do not put to much downward force on drive shaft.
.
.
.
25. Reinstall Fully Reassembled Diff with fluid pre filled. Raise with Jack, Have diff tilted slightly up in the frt to help align to drive shaft spline push diff onto drive shaft, raise unit into position. I found it easier to hand start rear bolt and nut and then align and hand start frt to bolts. Front 2 bolts must be torqued 1st to 100 NM before torquing Rear Bolt and Nut to 165 NM, Make Sure you torque the nut not bolt.
26. Apply blue loctite to drive shaft thread and torque drive shaft to 75 NM, remember to turn counter clockwise to tighten. AR wrench comes in handy with torque wrench.
27. Reconnect axle shafts, replacing bolts recommended, use blue loctite and torque to 52 NM.



That doesn't seem too bad. Anyone know if there's more to it than this if you buy the whole "pumpkin" already assembled?
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      02-06-2014, 11:10 PM   #18
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Quote:
Originally Posted by GreekboyD View Post
Sorry TDI. I fixed my link.
Ah yes, I had read that one too. That guy removed the entire driveshaft too. The link I just posted above the guy did it without removing the driveshaft. I think I'd rather not remove the driveshaft unless I absolutely had to ...
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      02-06-2014, 11:21 PM   #19
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Quote:
Originally Posted by TDIwyse View Post
Ah yes, I had read that one too. That guy removed the entire driveshaft too. The link I just posted above the guy did it without removing the driveshaft. I think I'd rather not remove the driveshaft unless I absolutely had to ...
I agree. These are also worth considering too if you get the Quaife:

Link

Link


I actually bought the ones in the second link over a year ago and they're just sitting here. I'll put them on whenever or if I ever decide to get the LSD.
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      02-07-2014, 05:23 AM   #20
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I've put up a new consolidated LSD thread here: http://www.e90post.com/forums/showth...light=mfactory

Thanks!
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      02-07-2014, 07:25 AM   #21
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Quote:
Originally Posted by MFactory
I've put up a new consolidated LSD thread here: http://www.e90post.com/forums/showth...light=mfactory

Thanks!
Good stuff man.
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      02-07-2014, 07:44 AM   #22
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Quote:
Originally Posted by GreekboyD View Post
I agree. These are also worth considering too if you get the Quaife:

Link

Link
Thanks.
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