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      09-30-2011, 04:06 PM   #1
Superoo
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LSD Question

Hi Guys,
Did a bit of research and realized the 07 feb+ production e92 LSD are welded to the rear axel.

My question is if i don't want to spent extra money on retro the core, can i just swap the rear axel with pre feb 07 production and purchase the bolt on ones like Quaife? would the swap be a hassle? or straight forward?
Thanks in advance

Super
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      09-30-2011, 11:06 PM   #2
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so no one knows?
not many ppl upgrade the option of LSD due to price, but i urge you all to do it because it's makes a huge differece.
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      10-01-2011, 10:19 AM   #3
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IF it would fit, it would be pretty simple. I don't know if it fits though.
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      10-01-2011, 10:29 AM   #4
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Quote:
Originally Posted by Superoo View Post
Hi Guys,
Did a bit of research and realized the 07 feb+ production e92 LSD are welded to the rear axel.

My question is if i don't want to spent extra money on retro the core, can i just swap the rear axel with pre feb 07 production and purchase the bolt on ones like Quaife? would the swap be a hassle? or straight forward?
Thanks in advance

Super
Of course, it will work. OEM swaps for OEM parts will always work. If you are thinking of going to a salvage to pick up a pre-FEB 07 axle, then go forward with confidence!

OBTW, I got the Quaife diff for my OCT 06 production 07 e90 335i and love the predictability and safety that a mechanical diff provides over an open diff.

GL with your plan. I believe it would be an outstanding, straightforward choice.
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      10-01-2011, 12:10 PM   #5
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That would be way too much of a hassle, just buy the install kit from **********s or something. It comes with the bolts and new ring gear and shims. All you need is the ring gear, you could buy a whole other diff but you can also just buy the pieces you need for less.
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      10-01-2011, 01:16 PM   #6
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Quote:
Originally Posted by Bakeme521 View Post
That would be way too much of a hassle, just buy the install kit from **********s or something. It comes with the bolts and new ring gear and shims. All you need is the ring gear, you could buy a whole other diff but you can also just buy the pieces you need for less.
care to elaborate more my friend?

if the differential is welded on the axel, the options are pretty much limited no?

Thanks
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      10-01-2011, 01:45 PM   #7
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Welded diff = need new carrier or some welding-torch surgery at a minimum.
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      10-01-2011, 02:17 PM   #8
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I emailed diffsonline.com and they said that they sell bolted crown rings and pinion for $900. Not sure if it's a good price but it may be a solution sometimes. I think **********s requires the customer to send it's differential for separation of the crown, etc.

However, I would highly recommend sending the rear axle to wavetrac/quaife/etc. for diff swapping. This way you eliminate as much as possible from the possible unexperienced shop error.
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