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 Rate Thread Display Modes
Old 10-19-2009, 03:16 AM   #1
bigjae1976
Registered User
 
bigjae1976's Avatar
 
Join Date: Dec 2003
Location: Earth
Posts: 11,468
My Ride: A car
Send a message via MSN to bigjae1976
Question Custom gears for non-M 6 sp

I've got a 330 6sp and just upgraded my diff to an 3.15 unit and I would like to eventually to with a 3.46 rear. I still do a lot of long distance highway cruising in my car so I would like to keep my RPMs down and MPG up.

The 6sp has a .85 6th gear. I was wondering if replacing the .85 6th gear with something taller is an option? (Maybe a .68 6th gear?)
bigjae1976 is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 10-25-2009, 05:36 PM   #2
Vinnie Vega
Registered User
 
Join Date: Feb 2007
Location: Cary, NC
Posts: 531
My Ride: 0032870Vette70Velle
This is actually a really good idea. The same low end as a 3.46 rear, with the gas mileage of a 3.07 in 6th gear. Id imagine you would have to find the same trans that's in another car with this taller 6th gear and have a real tranny guy swap over 6th. I highly doubt there's anyone actually making this gear, and its not really something id recommend doing your self. It might end up costing a lot more than its worth to have done.
Vinnie Vega is offline   Reply With Quote
Old 10-25-2009, 06:12 PM   #3
bigjae1976
Registered User
 
bigjae1976's Avatar
 
Join Date: Dec 2003
Location: Earth
Posts: 11,468
My Ride: A car
Send a message via MSN to bigjae1976
This is probably not a cheap project but I think it would be worth it. Its as close as you can get to having your cake and eating it too. I'm pretty sure that you'd need to get some sort of custom gear made.

I am going to contact Metric Mechanic about this. I am open to suggestions on other potential rebuilders that could do this.
bigjae1976 is offline   Reply With Quote
Old 10-25-2009, 10:06 PM   #4
Vinnie Vega
Registered User
 
Join Date: Feb 2007
Location: Cary, NC
Posts: 531
My Ride: 0032870Vette70Velle
well its more like paying for the fuel your saving up front. Do the math and I'm sure you'd have to drive an INSANE amount of highway miles to recoup your initial investment. I mean if your trying to be green that's fine I guess but I just don't see it paying off. What I would do is find another trans that would drop in with a similar 6th gear but tighter 1-5, and use the 3.15. It would probably cost you the same if not less money.
Vinnie Vega 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 Off
Censor is OFF





All times are GMT -5. The time now is 08:43 AM.


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