Bmw 325ci differential help - E46Fanatics 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!

Thread Tools Search this Thread Rate Thread Display Modes
Old 02-21-2017, 12:51 AM   #1
Registered User
Join Date: Nov 2016
Location: Australia
Posts: 2
My Ride: 325ci coupe m-sport
Bmw 325ci differential help

Hello everyone,
The Differential in my 2002 325ci manual 5 speed is on its way out. I am having trouble finding out the ratio that I have.

Will a diff from an automatic 325ci work or will the ratios be too short. Any help would be appreciated
BimmerBoss46 is offline   Reply With Quote
Ads by Google

Guests, get your FREE membership to remove this ad.
Old 02-21-2017, 01:21 AM   #2
Registered User
Join Date: Feb 2017
Location: Netherlands
Posts: 16
My Ride: BMW E46 328i
Stock ratio is 3.23 . Automatic is 3.38. Its a small difference. However a shorter ratio will make the car a lot more fun
Sjoerd is offline   Reply With Quote
Old 02-21-2017, 07:36 AM   #3
Registered User
Join Date: May 2008
Location: Indiana
Posts: 2,195
My Ride: 2003 330Ci
Here is a calculator that will help you determine the RPM difference.

Here is another link to the same site that shows the diffs used in the various US BMWs- not sure if AUS is different- it shows the 325Ci manual as a 3.15 ratio
Discounts on new and CPO cars.
Most Dealers offer a parts discount, BMP Design 10% off

Last edited by shanneba; 02-21-2017 at 07:40 AM.
shanneba is offline   Reply With Quote
Old 02-21-2017, 08:44 AM   #4
Registered User
Join Date: Feb 2014
Location: Potomac Falls, VA
Posts: 238
My Ride: 01 325i Sprt&PremPkg
The ratio should be stamped or printed on top of the diff, but you probably can't see it while it is installed. My 2001 325i auto has a 3.46 ratio. Going from a lower number to a higher number will improve your acceleration and decrease your top speed.
goodmanr is offline   Reply With Quote

325ci, diff, manual, ratio

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 03:55 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
(c) 1999 - VerticalScope Inc. All rights reserved.