E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

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.

Reply
 
Thread Tools Search this Thread Rating: Thread Rating: 31 votes, 5.00 average. Display Modes
Old 03-08-2012, 12:19 PM   #1
aggieE46
Keep it clean
 
aggieE46's Avatar
 
Join Date: Aug 2006
Location: Royse City
Posts: 8,043
My Ride: 03 Evo, 07 Passat
Send a message via AIM to aggieE46
E30/36 LSD into E46 Swap

Good morning fellow Fanatics. I'm hoping that this thread will go exactly as I have planned it. This is a continuation of where Raj left of here:

http://forum.e46fanatics.com/showthr...t=differential

While brainstorming with Raj on how to do this correctly, I made contact with a differential guru that assured me that it can be done. He gave me fairly complete instructions which I will be sharing along the way. I don't have exact measurements, but I'll do my best to provide them as I go.

Disclaimer: I am NOT a differential expert. Contrary to popular belief, I'm not an expert on much of anything. I read a LOT. I generally only post when I'm fairly certain that I'm correct. That's why I'm generally right, hah. So, follow this thread with that in mind. My source is a busy man and I will do my best to not bother him during the course of this project. He has given me his blessing to share this hard earned information but as asked me to remain anonymous. We will refer to him as Mr. Wizard for the remainder of this thread.

So, let's start with what I know. The E46 non-M suffers from a serious case of one-wheel-peel. We'd all like to fix this, but our options are limited.

1. E46 M3 differential swap: This is possibly one of the least expensive options currently available. They are fairly easy to source. You'll need the entire M subframe, control arms, swaybar, halfshafts, and differential. Your stumbling blocks are going to be a) limited gear ratios (3.62 or 4.10) and b) connecting your existing transmission to the differential.

2. Kaaz: This is probably the next budget option available right now. I think the unit runs around $1000-1200 (last I checked). On top of that, you'll have to have it installed. This isn't the job for the average DIYer. If you have a friend or a hookup, this is probably good for you. The downside to this would be limited gearing options. My last search showed that the unit would only work in the 3.38 or 3.46.

3. Performance Gearing (Or whichever shop you prefer): Having Jim Blanton setup a differential perfectly matched to your needs is probably the way to go. You can choose from any ratio you like. I don't even think he charges a core charge. That means you have a spare unit in your garage just in case of any issues. Warranty. Very nice. The only downside to this unit - price. I'd love to have one, but $3000 is too steep for my budget right now.

4. That brings us to this option. Using an E36/E30 limited slip unit in the E46 housing. If all goes well, I see this as the cheapest option. Will it be the highest performing option? Probably not. This is a mass produced LS unit designed for spirited daily driving. You may be digging through salvage yards or fighting over these on bimmer forums. If this thread goes well, you may really be fighting. If the pursuit of a great performing daily driver with a budget LSD solution is what you want, this thread may help.

So, let's begin. Here's where you need to be to catch up.

Use SoloII///M's DIY to tear down your unit:

http://forum.e46fanatics.com/showthr...t=differential

You do NOT need to remove your input shaft/pinion gear at this point. Pop out the output stubs, remove the seals, bla bla bla. He did the work, use his guide. Make sure you pay attention to which giant circlip goes on which side. I did NOT do this on my 2.93 that I will be testing this all on. I WILL do this on the 3.46 that will eventually get the transplant.

So here is what you should have handy:



On the left is the limited slip unit. On the right is the open unit from my 2.93. In the center is an output stub. We'll need all three of these to get going. Make sure the E46 bearings are in good shape. Mr. Wizard told me that E46 are not available for purchase. I'm going to double-check this with my local bearing supply, but I'd assume he knows what he's talking about. If yours are destroyed (either before beginning this project or during the next steps) this project can be tackled using E30 bearings. Your measurements will just be different to account for the difference in bearing height.

So, I'm going to leave you here. When we next meet, I'm hoping to have the bearings off of the units.
__________________

Last edited by aggieE46; 03-08-2012 at 02:05 PM.
aggieE46 is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 03-08-2012, 12:37 PM   #2
tinkwithanr
Registered User
 
Join Date: Oct 2006
Location: Springfield OH
Posts: 726
My Ride: '00 323i + '75 2002
Niice, good luck with this.
__________________
Tinker Engineering - 2014

Mica - 2000 BMW 323i - The one that started it all
Fiona - 1975 BMW 2002 - The Definition of Project Creep
Heidi - 1988 BMW M5 - The piece of BMW history
Silvia - 2013 Subaru WRX - Stock, for now
tinkwithanr is online now   Reply With Quote
Old 03-08-2012, 12:49 PM   #3
aggieE46
Keep it clean
 
aggieE46's Avatar
 
Join Date: Aug 2006
Location: Royse City
Posts: 8,043
My Ride: 03 Evo, 07 Passat
Send a message via AIM to aggieE46
Thanks. Units are at the machine shop now having the bearings pulled. I gave them the go-ahead to destroy the E36 bearings. He knows he can pull one of the E46 bearings without issue. The other might give him some trouble. If so, I'll be at Harbor Freight later getting a separator to do the job.

Got some quotes on the work needed, too. If they are able to do everything, this should be a cheap project. I have a rough estimate together for the total cost of the project. Including what I paid for the LSD unit, machining, a few internal parts, and fluid, I'm guessing that this will run about $540. That's a rough number. I have some options on my spacer plate. This number is with a fully cut unit. It's possible for them to make me one and me do some grinding to cut the costs. With budget in mind, I'll probably do that. If this is going into a 2.93 or 3.07, the cost will be even cheaper. I'll go over details on costs as the are incurred.

Quote:
Originally Posted by tinkwithanr View Post
Niice, good luck with this.
__________________

Last edited by aggieE46; 03-08-2012 at 03:19 PM.
aggieE46 is offline   Reply With Quote
Old 03-08-2012, 02:10 PM   #4
darksideracer69
Registered User
 
Join Date: Jan 2008
Location: TX
Posts: 2,886
My Ride: 01 325ci
i need this!
__________________
Quote:
Originally Posted by dmax View Post
If she ever yells 'oh god, oh god' just say, 'no, just Doug.'


IMAG02051
darksideracer69 is offline   Reply With Quote
Old 03-08-2012, 04:02 PM   #5
DarkJoker
Registered User
 
Join Date: Aug 2007
Location: mass
Posts: 914
My Ride: 01 330ci
keeping an eye on this thread as well
__________________
DarkJoker is offline   Reply With Quote
Old 03-08-2012, 04:34 PM   #6
aikmanson
Registered User
 
Join Date: Nov 2011
Location: Kingston/Cortland NY
Posts: 238
My Ride: 2000 323ci
Interesting... subscribed.
__________________
2003 Jeep Wrangler Rubicon
2000 BMW 323ci
1995 Saab 900 SE - JZW Stage 4
aikmanson is offline   Reply With Quote
Old 03-08-2012, 04:43 PM   #7
Snik
OEM ///Member
 
Snik's Avatar
 
Join Date: Dec 2007
Location: Around SJ AFB, NC
Posts: 20,744
My Ride: IR M3 Vert.
woah! i was wondering about this the other day when i read the 318Ti had a LSD, now here u are. so awesome.

Thanks. subscribed.
__________________
Quote:
Originally Posted by rohde88 View Post
^^^ do you spend all your free time on two wheels?
______________________________________
The Snikster posted sexy wiminz here
Do you ride a sportbike?
Do you have a question about Jamaica? Ask?
Snik is offline   Reply With Quote
Old 03-08-2012, 05:17 PM   #8
aggieE46
Keep it clean
 
aggieE46's Avatar
 
Join Date: Aug 2006
Location: Royse City
Posts: 8,043
My Ride: 03 Evo, 07 Passat
Send a message via AIM to aggieE46
Back from the machine shop. No luck. There were a few things that they weren't going to be able to tackle. The output stubs are hardened and would need carbide tooling to cut them. They couldn't do it. They pointed me to someone on the other side of town that was more into automotive projects. I'll head over there on Monday.

Also, upon some rational thinking and a tip from Mr. Wizard, I may switch things up and use the E30/E36 bearings. They are easy to find and are pretty cheap. If I burn up a set, I can replace them easily. If I burn up the E46 bearings, I have to pull them off another E46! This won't chance much, I'll go into detail when I get the bearings off and can provide visuals.
__________________
aggieE46 is offline   Reply With Quote
Old 03-09-2012, 09:12 AM   #9
darksideracer69
Registered User
 
Join Date: Jan 2008
Location: TX
Posts: 2,886
My Ride: 01 325ci
What about a torsen style LSD from a z3. Would that be better?

Sent from my SGH-T959V using Bimmer App
__________________
Quote:
Originally Posted by dmax View Post
If she ever yells 'oh god, oh god' just say, 'no, just Doug.'


IMAG02051
darksideracer69 is offline   Reply With Quote
Old 03-09-2012, 09:23 AM   #10
TiAg2247
Registered User
 
Join Date: Aug 2006
Location: YYZ / ORD
Posts: 2,302
My Ride: E39 M5 | E55 AMG
Awesome idea. Don't mean to threadjack, but if you want to go with the E46 M2 setup my custom driveshaft for a 5spd car + M3 diff will be for sale in late April.

Sub'd for updates!
__________________


Imola Red M5 | Imola Red Interior
GT Exhaust, Custom BC Coilovers, 19x10 + 19x11 Rial Dayonta Race, Michelin PSS

Daily: 335i M-Sport Alpine White / Coral Red
Cobb STG1+, FMIC, H&R Sport, BMW Perf Style 313


Past:
'04 E55 AMG
'01 330Ci Titanium Silver / Coral Red
'96 328i Jet Black / Black
TiAg2247 is offline   Reply With Quote
Old 03-10-2012, 01:53 AM   #11
SL Blak Soldier
Registered User
 
Join Date: Oct 2006
Location: Woodland Hills < SFV < LA < SoCal
Posts: 27,359
My Ride: 3 Pedal SG S54B32
Send a message via AIM to SL Blak Soldier
LOL. I didn't know you already made a thread.

I'm glad you decided to take over this project. You've already done more in two days than I have in the past few years.

I'm definitely sub'd to see more.

*edit* just found this in the other thread....

Quote:
Originally Posted by aggieE46 View Post
I'm not planning on letting you forget about this.
^I guess you kept your promise 2 years later.
__________________

Last edited by SL Blak Soldier; 03-10-2012 at 02:09 AM.
SL Blak Soldier is offline   Reply With Quote
Old 03-10-2012, 06:51 AM   #12
jared_wiesner
Registered User
 
Join Date: Aug 2009
Location: Ontario Canada
Posts: 735
My Ride: 1999 328i (M54b30)
Very interested to see how this goes!
__________________
jared_wiesner is offline   Reply With Quote
Old 03-12-2012, 07:18 PM   #13
JDUTHIE
Registered User
 
Join Date: Oct 2009
Location: SEATTLE
Posts: 548
My Ride: 2003 325xi
This is soo awesome, PLZ don't give up, if you can figure out how to get the 3.46 Lsd into the stock pumpkin you will be saving Xi owners a lot of money and time
JDUTHIE is offline   Reply With Quote
Old 03-12-2012, 08:11 PM   #14
aggieE46
Keep it clean
 
aggieE46's Avatar
 
Join Date: Aug 2006
Location: Royse City
Posts: 8,043
My Ride: 03 Evo, 07 Passat
Send a message via AIM to aggieE46
Not giving up. I'm just changing the plan a little. I'll be going by to get a bearing separator this week. Since I don't have to save the E46 bearings, I'm just going to buy the tool and DIY. I'd rather spend $40 and have a tool when I'm finished than... well, not.
__________________
aggieE46 is offline   Reply With Quote
Old 03-12-2012, 08:16 PM   #15
darksideracer69
Registered User
 
Join Date: Jan 2008
Location: TX
Posts: 2,886
My Ride: 01 325ci
More tools the better.

Sent from my SGH-T959V using Bimmer App
__________________
Quote:
Originally Posted by dmax View Post
If she ever yells 'oh god, oh god' just say, 'no, just Doug.'


IMAG02051
darksideracer69 is offline   Reply With Quote
Old 03-12-2012, 09:18 PM   #16
TerraPhantm
Registered User
 
Join Date: Feb 2008
Location: Mountain Top
Posts: 5,942
My Ride: 2005 M3 Coupe
Sub'd.. and I don't even have a non-M anymore.
__________________

Last edited by TerraPhantm; 03-12-2012 at 09:20 PM.
TerraPhantm is offline   Reply With Quote
Old 03-13-2012, 01:02 PM   #17
aggieE46
Keep it clean
 
aggieE46's Avatar
 
Join Date: Aug 2006
Location: Royse City
Posts: 8,043
My Ride: 03 Evo, 07 Passat
Send a message via AIM to aggieE46
Tried using a puller at noon to get a bearing off. No dice, lol. I may have to give in and buy the tool or have them pulled. Just seeing if I could do it
__________________
aggieE46 is offline   Reply With Quote
Old 03-13-2012, 02:27 PM   #18
SoloII///M
Registered User
 
Join Date: Mar 2005
Location: Columbia, MD
Posts: 494
My Ride: Many
If you need E46 bearings, talk to Dan@Diffsonline. He has a solution for them. So does Metric Mechanic.

I haven't had any luck pulling bearings off of those diffs without destroying them.
__________________
John V
'02 330Ci - Megasquirt 3 tuned by PFTuning.com, M50 manifold, Kromer Kraft headers, Motons, widebody, etc.
SoloII///M is offline   Reply With Quote
Old 03-13-2012, 02:39 PM   #19
aggieE46
Keep it clean
 
aggieE46's Avatar
 
Join Date: Aug 2006
Location: Royse City
Posts: 8,043
My Ride: 03 Evo, 07 Passat
Send a message via AIM to aggieE46
Email away. That will save me some head scratching.
__________________
aggieE46 is offline   Reply With Quote
Old 03-15-2012, 10:53 AM   #20
aggieE46
Keep it clean
 
aggieE46's Avatar
 
Join Date: Aug 2006
Location: Royse City
Posts: 8,043
My Ride: 03 Evo, 07 Passat
Send a message via AIM to aggieE46
Snore. Sorry for the delays. Had some financial things come up. Should be back on track next week for a decent update.
__________________
aggieE46 is offline   Reply With Quote
Reply

Tags
e36, lsd

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Censor is OFF





All times are GMT -5. The time now is 08:01 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use