Idea for LSD retrofitting...Plausible???? Experts please chime in! :) - BMW 3-Series (E90 E92) Forum

BrianMN · 05-13-2010, 11:22 PM

So I'm in the market for an LSD...however, I have an 08 and a welded ring gear.

LSD Package prices for Bolted Ring are ~$1200 or so, whereas LSD packages with welded ring gear equal ~$2100.

Here's my thought. Would we be able to purchase the ring gear and whatever else is necessary to 'convert' our welded differential to a bolted differential?

I couldn't find the inner parts on REALOEM or GETBMWPARTS...so I'm thinking the dealer is the only option..

Then do the companies machine off our ring gear of the core that you'd send in?
Or am I just way out of the loop and the LSD packages for welded diffs include the parts to convert the diff to bolted.???

Thanks in advance for the Knowledge Transfer!

DJKhan85 · 05-13-2010, 11:32 PM

www.diffsonline.com sells the 3.46 ratio ring gear. You can buy that and then your LSD. Bolt the 2 pieces together and you have a bolted LSD. I haven't found a place to sell 3.08 ring gears but diffsonline might.

Brey335i · 05-13-2010, 11:39 PM

I too would be interested in this stuff

GreenPlease · 05-13-2010, 11:45 PM

DJ

Nice resource. Thanks.

Edit: they have a thing on their front page "335i diffs in stock, call to build your now"

Guess I'm calling them tomorrow

DJKhan85 · 05-13-2010, 11:55 PM

Quote:

Originally Posted by GreenPlease

DJ

Nice resource. Thanks.

Edit: they have a thing on their front page "335i diffs in stock, call to build your now"

Guess I'm calling them tomorrow

I've been trying to call them for a few weeks now. They must be really backed up.

BrianMN · 05-14-2010, 12:16 AM

Thanks for the replies! I am happy this might be possible! Now hopefully the stupid ring and other parts don't cost $900--the difference in diffs to begin with..haha

Aridk · 05-14-2010, 03:22 AM

I have asked both in Danmark and German Bmw dealers you can´t just bay the ringgear from an pre 0307 model it´t not sold sepertly

You have to bay a complete differential and thats the new one with the welded dif.

Belarus · 05-14-2010, 03:49 AM

Do you have A/T or M/T ?

Aridk · 05-14-2010, 09:12 AM

Mt jun 07 build, so just a couple of month earlier build would have saved me some cash

BrianMN · 05-14-2010, 09:16 AM

6mt. Wouldn't mind switching up final drive ratios though

Belarus · 05-14-2010, 09:21 AM

Quote:

Originally Posted by Aridk

Mt jun 07 build, so just a couple of month earlier build would have saved me some cash

Yup...

Belarus · 05-14-2010, 09:24 AM

Quote:

Originally Posted by BrianMN

6mt. Wouldn't mind switching up final drive ratios though

Check with HP Autowerks I think it's possible with Quaife LSD

gian335 · 05-14-2010, 10:28 AM

It's funny.... Mine is a 11/07 builddate AT.... And apparently mine came with a bolted diff... So I'm guessing sum of the AT diffs were bolted until a little later.... Correct me if i'm wrong.....howmuch labour r u looking with LSD 7-9 hrs would be myguess, for bolted diffs ofcourse

Belarus · 05-14-2010, 01:16 PM

All 335i models built up to 3/2007 have bolted differential

335i with M/T built after 3/2007 have welded differential

335i with A/T built between 3/2007 and 9/2007 have welded differential

All 335i A/T built after 9/2007 have bolted differential

Might want to check this thread. Wavetrac Differentials vs. Quaife ATB Differential for RWD 335i

There are few other similar ones and reviews, but you'll need to

.

GL...

scottp999 · 05-14-2010, 01:42 PM

Quote:

Originally Posted by BrianMN

6mt. Wouldn't mind switching up final drive ratios though

Yes, Harold can produce one for you. The price is higher, much higher I think. For Quaife, what I saw was $2200 + $800 core charge for 3.08 (quaife), but this recently went up (price changed 5/11) to $2588 + $1000 core charge.

If you go to 3.46 gears then there is no core, you pay $3600 an keep you original diff. This may have changed but this is where I came up with that info:

3.46 for manual trans:

http://www.e90post.com/forums/showthread.php?t=282877

3.08:

http://www.e90post.com/forums/showthread.php?t=365276

So with 3.08 you can pay $2600 + shipping after you send your core back in.

I got the 3.08 and it's being installed next week (can't wait).

Wavetrac is probably different pricing, but after Former_Boosteds review, I chose Quaife.

BrianMN · 05-14-2010, 08:29 PM

Right...and I'm trying to avoid that much higher cost by buying the bolted ring gear for considerably less than the $1400 price bump.

No answer at Diffsonline for me today..

05-13-2010, 11:22 PM	#1
BrianMN Colonel Drives: 4 Door Family Sedan Join Date: Sep 2009 Location: Minneapolis Posts: 2,421 iTrader: (7)	Idea for LSD retrofitting...Plausible???? Experts please chime in! :) So I'm in the market for an LSD...however, I have an 08 and a welded ring gear. LSD Package prices for Bolted Ring are ~$1200 or so, whereas LSD packages with welded ring gear equal ~$2100. Here's my thought. Would we be able to purchase the ring gear and whatever else is necessary to 'convert' our welded differential to a bolted differential? I couldn't find the inner parts on REALOEM or GETBMWPARTS...so I'm thinking the dealer is the only option.. Then do the companies machine off our ring gear of the core that you'd send in? Or am I just way out of the loop and the LSD packages for welded diffs include the parts to convert the diff to bolted.??? Thanks in advance for the Knowledge Transfer!
	Tweet

05-13-2010, 11:32 PM	#2
DJKhan85 Major Drives: 2011 4dr 6mt Golf GTI Join Date: Jun 2009 Location: Boston Massachusetts Posts: 1,190 iTrader: (1)	www.diffsonline.com sells the 3.46 ratio ring gear. You can buy that and then your LSD. Bolt the 2 pieces together and you have a bolted LSD. I haven't found a place to sell 3.08 ring gears but diffsonline might. __________________ 2011 VW GTI 4dr-6mt-Sunroof-Nav-Xenons OLD: 08 335i AW/CR/Poplar 6mt-ZSP-ZPP-ZCW-iPod-iDrive-PDC-Style 230s w/FK 452-Dinan LSD

05-13-2010, 11:45 PM	#4
GreenPlease Lieutenant Colonel Drives: BMW 335i e92 Join Date: Feb 2008 Location: Orlando Florida Posts: 1,637 iTrader: (2)	DJ Nice resource. Thanks. Edit: they have a thing on their front page "335i diffs in stock, call to build your now" Guess I'm calling them tomorrow __________________ Cars>Women

05-14-2010, 03:49 AM	#8
Belarus Brigadier General Drives: E93 335i Join Date: Mar 2009 Location: GTA Posts: 3,908 iTrader: (11) Garage List 2008 E93 335i (Conv ... [2.20]	Do you have A/T or M/T ? __________________ 12.770 @ 112.81 mph\|\|slip\|\|JB4\|FMIC\|DPs\|DCI\|N54 DVs\|ER CP\|Koni FSD\|Eibach-Pro\|F Strut-bar\|R Sway-bar\|Hankooks V12\|DPE SP16\|BBK\|15%Tint\|CF Front Lip\|CF Diffuser\|M3 Spoiler\|SmartTop\|LUX AE\|Debadged

05-14-2010, 01:16 PM	#14
Belarus Brigadier General Drives: E93 335i Join Date: Mar 2009 Location: GTA Posts: 3,908 iTrader: (11) Garage List 2008 E93 335i (Conv ... [2.20]	All 335i models built up to 3/2007 have bolted differential 335i with M/T built after 3/2007 have welded differential 335i with A/T built between 3/2007 and 9/2007 have welded differential All 335i A/T built after 9/2007 have bolted differential Might want to check this thread. Wavetrac Differentials vs. Quaife ATB Differential for RWD 335i There are few other similar ones and reviews, but you'll need to . GL... __________________ 12.770 @ 112.81 mph\|\|slip\|\|JB4\|FMIC\|DPs\|DCI\|N54 DVs\|ER CP\|Koni FSD\|Eibach-Pro\|F Strut-bar\|R Sway-bar\|Hankooks V12\|DPE SP16\|BBK\|15%Tint\|CF Front Lip\|CF Diffuser\|M3 Spoiler\|SmartTop\|LUX AE\|Debadged

05-13-2010, 11:39 PM	#3
Brey335i Brigadier General Drives: e46 ///M3 Join Date: Oct 2009 Location: Austin, TX Posts: 4,741 iTrader: (11)	I too would be interested in this stuff

05-14-2010, 12:16 AM	#6
BrianMN Colonel Drives: 4 Door Family Sedan Join Date: Sep 2009 Location: Minneapolis Posts: 2,421 iTrader: (7)	Thanks for the replies! I am happy this might be possible! Now hopefully the stupid ring and other parts don't cost $900--the difference in diffs to begin with..haha

05-14-2010, 03:22 AM	#7
Aridk Lieutenant Drives: 335i Join Date: Jan 2008 Location: Denmark Posts: 486 iTrader: (0)	I have asked both in Danmark and German Bmw dealers you can´t just bay the ringgear from an pre 0307 model it´t not sold sepertly You have to bay a complete differential and thats the new one with the welded dif.

05-14-2010, 09:12 AM	#9
Aridk Lieutenant Drives: 335i Join Date: Jan 2008 Location: Denmark Posts: 486 iTrader: (0)	Mt jun 07 build, so just a couple of month earlier build would have saved me some cash

05-14-2010, 09:16 AM	#10
BrianMN Colonel Drives: 4 Door Family Sedan Join Date: Sep 2009 Location: Minneapolis Posts: 2,421 iTrader: (7)	6mt. Wouldn't mind switching up final drive ratios though

05-14-2010, 10:28 AM	#13
gian335 Major Drives: e92 335 Join Date: Apr 2008 Location: uknown Posts: 1,044 iTrader: (1)	It's funny.... Mine is a 11/07 builddate AT.... And apparently mine came with a bolted diff... So I'm guessing sum of the AT diffs were bolted until a little later.... Correct me if i'm wrong.....howmuch labour r u looking with LSD 7-9 hrs would be myguess, for bolted diffs ofcourse

05-14-2010, 08:29 PM	#16
BrianMN Colonel Drives: 4 Door Family Sedan Join Date: Sep 2009 Location: Minneapolis Posts: 2,421 iTrader: (7)	Right...and I'm trying to avoid that much higher cost by buying the bolted ring gear for considerably less than the $1400 price bump. No answer at Diffsonline for me today..

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