[BMWs4me]

Originally Posted by BrowBMW

What was the cost on the diy solution?

Looks like the parts are just under $2K. Just do a search for "Quaife LSD Conversion Kit", and you can find their website.

[beegeezy]

Are our diffs welded or bolted? That does make quite a difference in ever getting this to be affordable?

[Procommuter]

beegeezy, It depends on ur application if welded or not, In my case 2014 msport 535d it is welded. So when I started to research this, it made things more spendy! Where I live (Nor Cal) the dealer for wavtrac, told me that, they had never done one before and that the carrier would have to be sent out for machining, ring gear cut off and drilled for bolts and couldn't quote me an all in price. also wanted me to supply all parts.So after considering down time and unknown over all cost, I found the Quaife off the shelf complete LSD unit was the way to go for me anyway.

[BMWs4me]

Originally Posted by beegeezy

Are our diffs welded or bolted? That does make quite a difference in ever getting this to be affordable?

I know my 2015 535i xDrive is welded, here are the cars that use the same differential...

Part 33107584448 was found on the following vehicles:
5' F07 GT   (09/2008 — 06/2013)
5' F07 GT LCI   (08/2012 — 02/2017)
5' F10   (01/2009 — 06/2013)
5' F10 LCI   (08/2012 — 10/2016)
5' F11   (02/2009 — 06/2013)
5' F11 LCI   (08/2012 — 02/2017)
5' F18   (08/2009 — 07/2013)
5' F18 LCI   (11/2012 — 12/2016)
7' F01 LCI   (05/2011 — 05/2015)
7' F02 LCI   (05/2011 — 05/2015)

[beegeezy]

Originally Posted by BMWs4me

I know my 2015 535i xDrive is welded, here are the cars that use the same differential...

Part 33107584448 was found on the following vehicles:
5' F07 GT   (09/2008 — 06/2013)
5' F07 GT LCI   (08/2012 — 02/2017)
5' F10   (01/2009 — 06/2013)
5' F10 LCI   (08/2012 — 10/2016)
5' F11   (02/2009 — 06/2013)
5' F11 LCI   (08/2012 — 02/2017)
5' F18   (08/2009 — 07/2013)
5' F18 LCI   (11/2012 — 12/2016)
7' F01 LCI   (05/2011 — 05/2015)
7' F02 LCI   (05/2011 — 05/2015)

Well, it seems like all F10 Auto N55 rear diffs are welded. The manual trans N55 diff is a different part number, so that needs to be verified too.

[Bmwdoubles_]

So there's basically no LSD for our cars? I need to replace the seals on my diff and if I need to pull it out to have it done then might as well LSD. Any updates on this for a recommendation?

ECS says this is a fit

https://www.ecstuning.com/b-wavetrac...30309175wkwvt/

[BimmerHausPerformance]

Originally Posted by Bmwdoubles_

So there's basically no LSD for our cars? I need to replace the seals on my diff and if I need to pull it out to have it done then might as well LSD. Any updates on this for a recommendation?

ECS says this is a fit

https://www.ecstuning.com/b-wavetrac...30309175wkwvt/

Call them and ask, someone said it didn't work for our cars, but I also know AT vs MT has a different diff or part #. I would love to know this cause I am gonna need one here soon.

[socalengineer]

Bump... Anyone find a reasonably priced solution for this?

[BimmerHausPerformance]

Nope. There isn’t one. Ford rear end is what the e90 guys are doing but no thanks. There is a brand new one for sale in the classifieds you could get for a deal… it is for an AT though, won’t work for me.