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 > E46 BMW > General E46 Forum

General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 03-20-2017, 12:06 AM   #1
RedDawn
Registered User
 
Join Date: Mar 2017
Location: Rhode Island
Posts: 6
My Ride: 99 323i
Differential swap 3.07 to 3.46 Help!!!

OK so my question is can I use a 3.46 differential from a 325i automatic or 323i automatic and bolt it right into my 323i with manual transmission. I don't have the budget right now to experiment or I would but, it seems a lot easier and a little cheaper to find a 3.46 that came out of an automatic car, and also the automatic 323i is geared to 3.46 and if I could just bolt it right up I just may be able to smile again. Facts will be appreciated! thanks
RedDawn is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 03-20-2017, 12:09 AM   #2
04yfz
Registered User
 
Join Date: Nov 2005
Location: Central NJ
Posts: 1,467
My Ride: A car
Yep it's a plug and play set up if you use a non 330i diff. I actually have a 3.46 diff out of an auto 323i I'm parting out, Pm me or shoot me a text if you can't pm. 732-705-7005 (yes it's a real number lol).
__________________

Last edited by 04yfz; 03-20-2017 at 12:10 AM.
04yfz is offline   Reply With Quote
Old 03-20-2017, 04:56 AM   #3
JCastillo
Registered User
 
Join Date: Mar 2017
Location: Kentucky
Posts: 44
My Ride: 2000 BMW 323CI
Nice... i will definitely be doing this too

Sent from my SAMSUNG-SM-G935A using E46Fanatics mobile app
JCastillo is offline   Reply With Quote
Old 03-20-2017, 11:30 AM   #4
goodmanr
Registered User
 
Join Date: Feb 2014
Location: Potomac Falls, VA
Posts: 233
My Ride: 01 325i Sprt&PremPkg
Quote:
Originally Posted by 04yfz View Post
Yep it's a plug and play set up if you use a non 330i diff. I actually have a 3.46 diff out of an auto 323i I'm parting out, Pm me or shoot me a text if you can't pm. 732-705-7005 (yes it's a real number lol).
You can use the diff from a 330i but the input flange will need to be changed. Just use the one from your old diff.

Last edited by goodmanr; 03-20-2017 at 12:03 PM.
goodmanr is offline   Reply With Quote
Old 03-20-2017, 01:27 PM   #5
Alex323Ci
Registered User
 
Join Date: Jan 2005
Location: Huntington Beach -Surf City USA
Posts: 20,230
My Ride: M3 & 323Ci (sold)
Quote:
Originally Posted by RedDawn View Post
OK so my question is can I use a 3.46 differential from a 325i automatic or 323i automatic and bolt it right into my 323i with manual transmission. I don't have the budget right now to experiment or I would but, it seems a lot easier and a little cheaper to find a 3.46 that came out of an automatic car, and also the automatic 323i is geared to 3.46 and if I could just bolt it right up I just may be able to smile again. Facts will be appreciated! thanks
here's a bunch of info on this that'll probably help

http://forum.e46fanatics.com/showthr...ferential+swap
__________________
OE CSL WHEELS - OE CSL BRAKES - OE AUTOFLD MIRRORS - CSL RACK - CSL TRUNK - CSL DIFFUSER - AA TUNE - AA PULLEYS - AS 40% SSK - BILSTEIN PSS9s
CF CSL LIP - NAV- BMWP CF STRUT BAR - BMW GROUP N MNTS - GRUPPE M CF INTAKE - SUPERSPRINT - UUC S/S LINES, RTABs - H&R SWAYS - 4.10 M-SPORT DIFF
Alex323Ci is offline   Reply With Quote
Old 03-20-2017, 05:22 PM   #6
TobyB
Registered User
 
Join Date: Jan 2012
Location: seattle
Posts: 258
My Ride: 2004xit, 2001ci
Quote:
You can use the diff from a 330i but the input flange will need to be changed. Just use the one from your old diff.
err, it's not that easy. There's no way to reset the pinion preload properly, so you run a real risk of having the 'new' diff fail pretty
quickly due to the pinion being either too loose or too tight.

Yes, a new crush sleeve and seal and some care gets it back together again, but it's at least a 3 banana job. Far easier to find the right flange.

t
TobyB is offline   Reply With Quote
Old 03-20-2017, 05:28 PM   #7
Alex323Ci
Registered User
 
Join Date: Jan 2005
Location: Huntington Beach -Surf City USA
Posts: 20,230
My Ride: M3 & 323Ci (sold)
Quote:
Originally Posted by TobyB View Post
err, it's not that easy. There's no way to reset the pinion preload properly, so you run a real risk of having the 'new' diff fail pretty
quickly due to the pinion being either too loose or too tight.
Yes, a new crush sleeve and seal and some care gets it back together again, but it's at least a 3 banana job. Far easier to find the right flange.
t
it's not that hard. it's a swap over, much different than installing new gears inside and setting up. you mark the nut and pinion tip. count turns off and position, then repeat when installing on.
__________________
OE CSL WHEELS - OE CSL BRAKES - OE AUTOFLD MIRRORS - CSL RACK - CSL TRUNK - CSL DIFFUSER - AA TUNE - AA PULLEYS - AS 40% SSK - BILSTEIN PSS9s
CF CSL LIP - NAV- BMWP CF STRUT BAR - BMW GROUP N MNTS - GRUPPE M CF INTAKE - SUPERSPRINT - UUC S/S LINES, RTABs - H&R SWAYS - 4.10 M-SPORT DIFF
Alex323Ci is offline   Reply With Quote
Old 03-22-2017, 11:38 AM   #8
RedDawn
Registered User
 
Join Date: Mar 2017
Location: Rhode Island
Posts: 6
My Ride: 99 323i
Best news I've heard all day!
RedDawn is offline   Reply With Quote
Old 03-23-2017, 11:53 PM   #9
TobyB
Registered User
 
Join Date: Jan 2012
Location: seattle
Posts: 258
My Ride: 2004xit, 2001ci
Quote:
it's not that hard. it's a swap over
So you can trust that the pinion flanges are the same thickness?
I'm coming from previous generations, where it was variable...

t
TobyB is offline   Reply With Quote
Old 03-24-2017, 03:14 AM   #10
Alex323Ci
Registered User
 
Join Date: Jan 2005
Location: Huntington Beach -Surf City USA
Posts: 20,230
My Ride: M3 & 323Ci (sold)
yes.
__________________
OE CSL WHEELS - OE CSL BRAKES - OE AUTOFLD MIRRORS - CSL RACK - CSL TRUNK - CSL DIFFUSER - AA TUNE - AA PULLEYS - AS 40% SSK - BILSTEIN PSS9s
CF CSL LIP - NAV- BMWP CF STRUT BAR - BMW GROUP N MNTS - GRUPPE M CF INTAKE - SUPERSPRINT - UUC S/S LINES, RTABs - H&R SWAYS - 4.10 M-SPORT DIFF
Alex323Ci is offline   Reply With Quote
Reply

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 On
Censor is ON





All times are GMT -5. The time now is 07:02 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
(c) 1999 - 2016 performanceIX Inc - privacy policy - terms of use