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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 10-18-2010, 09:09 AM   #1
pMak26
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I Want LSD W stock Gear Ratio 2.93; HOW?

So, how can I accomplish keeping my stock gear ratio but installing an LSD in my car.

Do my gears fit on the stock M3 diff? So I could purchase a M3 diff and swap my gears onto that diff and bam, I have what I want.

One wheel spin is killing me.
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Old 10-18-2010, 09:58 AM   #2
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Get a Quaife limited slip for your diff.
You would put your gears onto the Quaife carrier and have a great LSD.
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Old 10-18-2010, 12:14 PM   #3
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There are plenty of vendors out there that can do this. Diffsonline and Performance Gearing come to mind. Trust me, they have plenty of 2.93 ring and pinions sitting around or could just reuse yours. I bet you could order a 2.93 diff from one of them, change it out on your car in a few hours and send them back yours as a core. Whatever you do, get the finned diff cover (they will know what you are talking about). It keeps the diff cooler and you can jack the rear of the car up on it.
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Old 10-18-2010, 12:48 PM   #4
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Quaife just isn't worth the money though. The car isn't worth enough money to justify spending $2k on just a diff.

I'm looking to pick something up used and swap it into my car in some fashion. I was watching SL Black Soldier thread about using an e36 diff and grinding the case down until it fit in the e46 housing. I wouldn't mind doing something like that and use my 2.93 gears and flanges, but I don't know if that would last. Hence my thinking I'd use an e46M3 diff and swap my gears onto that if they fit.

So I guess my question is, do 2.93 gears bolt onto the M3 diff in replace ment of the 3.67 (or whatever ratio).

Am I just dreaming? lol

Second Idea... e36 diff complete assemble. There has to be a way to wedge the e36diff into our subframes, no?
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Old 10-18-2010, 12:52 PM   #5
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Yes, you are just dreaming. There is simply no way to cheaply and reliably install a LSD core from any other model into the e46 non-M carrier.
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Old 10-18-2010, 01:26 PM   #6
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Old 10-18-2010, 02:13 PM   #7
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Yes, you are just dreaming. There is simply no way to cheaply and reliably install a LSD core from any other model into the e46 non-M carrier.
I figured. That's such a downfall of our cars.

The OS Giken unit is nice, but again its almost $2gs and just not worth it.

I half considered welding the diff just to stop the annoying 1 wheel spin, but I'm not that stupid.
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Old 10-18-2010, 05:37 PM   #8
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The Quaife diff is only $1350, if you were going to buy a M3 diff and swap your gears into it, it would cost you more than getting the Quaife and putting your gears onto it!
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Old 10-18-2010, 07:05 PM   #9
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Where can I pick one up for $1350? I took a look at turners site and it was something like $1650.

Even for $1350 I'll be thinking for a while if this is really worth it.
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Old 10-19-2010, 12:59 AM   #10
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did you figure in labor costs? Any LSD builder can use your stock ratio...Perf Gearing, Diffsonline, and Metric Mechanic.
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Old 10-19-2010, 01:00 AM   #11
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It keeps the diff cooler and you can jack the rear of the car up on it.
I've considered it, but never had the balls to try it. Make's sense though....any damage?
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Old 10-19-2010, 07:51 AM   #12
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I've considered it, but never had the balls to try it. Make's sense though....any damage?
I've been jacking up on it for many years. That cover can take a pretty good hit before it breaks.
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Old 10-19-2010, 07:59 AM   #13
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Buy an E36.
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Old 10-19-2010, 10:11 AM   #14
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^ thats exactly what I've been trying to do: http://forum.e46fanatics.com/showthr...441&highlight=

Can't sell it though. I have someone with an e36 waiting for me to sell my car and he'll sell me his, but no one is buying anything right now. I'd be willing to let it go for a really good deal for someone, but no one is even interested.
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Old 10-20-2010, 07:46 AM   #15
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If you search here for Quaife, you will find a thread "3 reasons why you need a Quaife..." with a link to a sponsor that has the Quaife for $1350.00

http://forum.e46fanatics.com/showthr...ghlight=quaife

Back in June they had a special running: (I believe the 2.93 gears need the 13N)
We are offering the QDF 13N unit for $1232.50 with free shipping
We have the QDF 14N available for $1305 with free shipping
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Last edited by shanneba; 10-20-2010 at 07:48 AM.
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Old 10-23-2010, 05:19 PM   #16
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Originally Posted by pMak26 View Post
Quaife just isn't worth the money though. The car isn't worth enough money to justify spending $2k on just a diff.

I'm looking to pick something up used and swap it into my car in some fashion. I was watching SL Black Soldier thread about using an e36 diff and grinding the case down until it fit in the e46 housing. I wouldn't mind doing something like that and use my 2.93 gears and flanges, but I don't know if that would last. Hence my thinking I'd use an e46M3 diff and swap my gears onto that if they fit.

So I guess my question is, do 2.93 gears bolt onto the M3 diff in replace ment of the 3.67 (or whatever ratio).

Am I just dreaming? lol

Second Idea... e36 diff complete assemble. There has to be a way to wedge the e36diff into our subframes, no?

If you plan on using M3 diff it will cost you more then Quaife unit as you would need to buy the whole rear end off M3 + a custom drive shaft if you use 5 speed tranny(if you have a 6 speed then just use M3 drive shaft).

Believe me, its actually alot cheaper to just buy Quaife unit then to buy M3 diff, diff carrier, control arms, brakes, axles, and building a custom drive shaft.

Good luck thou.
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Old 12-02-2010, 07:45 PM   #17
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Quaife just isn't worth the money though. The car isn't worth enough money to justify spending $2k on just a diff.
i got my quaife from harold at hpautowerks for 1200 new (it was a display model) i have a harder time deciding which was better between schrick cams + oem mk4 navi vs the diff alone, seriously for dd use it is great, if you can get in installed for a good price then you'd be g2g

birds auto (byrds?) from england can get you them also, they were very helpful when i was asking around too
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