BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      08-16-2020, 09:54 PM   #67
SKI-R
Working towards usefulness
Canada
79
Rep
106
Posts

Drives: VW Golf/Jetta ALHs
Join Date: Nov 2019
Location: Canmore

iTrader: (0)

Anyone here have a complete 3.23 they want to recover some upgrade costs from? Bound to the stock ratio by class regulations......you'd need to be willing to ship to/within ���� . There's a few around, but would prefer a lower mileage version from a forum member vs a generic vendor.

Thanks.
__________________
09 128i Slicktop - TCKlines, KMac Plates, M3 RSFB, M3 RSB, Hotchkis FSB/endlinks, 1M brace, Wavetrac
Appreciate 0
      08-17-2020, 09:08 PM   #68
Ric in RVA
Bergspyder
Ric in RVA's Avatar
United_States
804
Rep
961
Posts

Drives: '11 BMW 128i Sport 6mt
Join Date: Oct 2015
Location: Richmond VA

iTrader: (1)

Thanks to you guys my ebay e82 auto diff gets here later this week/ early next week. Looking forward to the swap.
__________________
Ric in RVA

2011 128i 6 MT Sport, 10 Land Rover LR4, 2011 528i N52, 18 F150 Platinum, Sequoia, a few motorcycles.
Appreciate 0
      08-27-2020, 08:44 PM   #69
Sliver_Legend
New Member
8
Rep
18
Posts

Drives: 2009 128i
Join Date: Aug 2020
Location: Greensboro NC

iTrader: (0)

Garage List
2009 bmw 128i  [0.00]
just got my 3.73

can't wait to put it in. got one from LKQ out of a 2012 328i putting it in this weekend. Stoked about it.
Appreciate 0
      08-28-2020, 07:00 AM   #70
Ric in RVA
Bergspyder
Ric in RVA's Avatar
United_States
804
Rep
961
Posts

Drives: '11 BMW 128i Sport 6mt
Join Date: Oct 2015
Location: Richmond VA

iTrader: (1)

Still haven't found time to do mine. But I did find some online info and make up a simple table of speed in gears.

3.23

Oem tire
Tire Width (mm):205
Tire Aspect Ratio:50
Wheel Size (inches):17
Diameter: 25.1"

Engine Redline RPM:
7000


1st Gear: 4.32. 37.4 MPH
2nd Gear: 2.46. 65.7 MPH
3rd Gear: 1.660 97.4 MPH
4th Gear: 1.230 131.4 MPH
5th Gear: 1.000 161.6 MPH
6th Gear: 0.850 190.2 MPH
Final: 3.230 (Getrag)

Cruising Speed (MPH): 80
Cruising RPM: 2945 RPM


3.73

3.73 3.23

1st Gear: 32.4 MPH. vs stock 37.34
2nd Gear: 56.9 MPH. vs stock 65.7
3rd Gear: 84.3 MPH. vs stock 97.4
4th Gear: 113.8 MPH vs stock 131.4
5th Gear: 140.0 MP. . vs stock 161.6
6th Gear: 164.7 MPH vs stock 190.2
Final:
3.730 (Getrag)

Cruising Speed (MPH): 80
Cruising RPM: 3401 RPM
__________________
Ric in RVA

2011 128i 6 MT Sport, 10 Land Rover LR4, 2011 528i N52, 18 F150 Platinum, Sequoia, a few motorcycles.
Appreciate 1
b1aze455.50

      09-05-2020, 03:21 PM   #71
Sliver_Legend
New Member
8
Rep
18
Posts

Drives: 2009 128i
Join Date: Aug 2020
Location: Greensboro NC

iTrader: (0)

Garage List
2009 bmw 128i  [0.00]
got it done today! can't wait to feel the difference.
Appreciate 0
      09-06-2020, 07:00 PM   #72
Ric in RVA
Bergspyder
Ric in RVA's Avatar
United_States
804
Rep
961
Posts

Drives: '11 BMW 128i Sport 6mt
Join Date: Oct 2015
Location: Richmond VA

iTrader: (1)

Quote:
Originally Posted by Sliver_Legend View Post
got it done today! can't wait to feel the difference.
Mine still sitting in its box....love to hear what you think.
__________________
Ric in RVA

2011 128i 6 MT Sport, 10 Land Rover LR4, 2011 528i N52, 18 F150 Platinum, Sequoia, a few motorcycles.
Appreciate 0
      09-18-2020, 05:44 PM   #73
NA64LIFE
Private First Class
52
Rep
101
Posts

Drives: '12 128i Msport
Join Date: Mar 2013
Location: Bay Area

iTrader: (1)

Just picked up a 3.73 diff from a 2012 128 w/ 22k miles. Would you guys suggest changing out the seals before putting it in? Are our diffs known to leak?
Appreciate 0
      09-19-2020, 07:14 AM   #74
Ric in RVA
Bergspyder
Ric in RVA's Avatar
United_States
804
Rep
961
Posts

Drives: '11 BMW 128i Sport 6mt
Join Date: Oct 2015
Location: Richmond VA

iTrader: (1)

Quote:
Originally Posted by NA64LIFE View Post
Just picked up a 3.73 diff from a 2012 128 w/ 22k miles. Would you guys suggest changing out the seals before putting it in? Are our diffs known to leak?

22K....slap that in. Change the oil while it sits on the garage floor but only since it is easy.
__________________
Ric in RVA

2011 128i 6 MT Sport, 10 Land Rover LR4, 2011 528i N52, 18 F150 Platinum, Sequoia, a few motorcycles.
Appreciate 1
      09-22-2020, 05:39 PM   #75
Sliver_Legend
New Member
8
Rep
18
Posts

Drives: 2009 128i
Join Date: Aug 2020
Location: Greensboro NC

iTrader: (0)

Garage List
2009 bmw 128i  [0.00]
how I feel about it

Quote:
Originally Posted by Ric in RVA View Post
Quote:
Originally Posted by Sliver_Legend View Post
got it done today! can't wait to feel the difference.
Mine still sitting in its box....love to hear what you think.
so I did it. mpg isn't terrible. I drive 15 minutes on the highway everyday. at 70-75 mph I'm pushing 3k rpm. beyond that no issues. the launch is way better. I'm not upset that I did it at all.
Appreciate 0
      09-22-2020, 06:17 PM   #76
E91WAG3N
aka UberSteuer
E91WAG3N's Avatar
United_States
660
Rep
945
Posts

Drives: E91, E91
Join Date: Sep 2015
Location: Las Vegas

iTrader: (2)

Quote:
Originally Posted by Sliver_Legend View Post
so I did it. mpg isn't terrible. I drive 15 minutes on the highway everyday. at 70-75 mph I'm pushing 3k rpm. beyond that no issues. the launch is way better. I'm not upset that I did it at all.
I have a similar commute. Well, I did before work from home.

Would the ratio being slightly less aggressive help at all in your opinion? There is also a 3.62 from a 330i that I'm considering for my E91.
__________________
Instagram @E91WAG3N
Appreciate 0
      09-23-2020, 11:38 AM   #77
markslc1
First Lieutenant
88
Rep
387
Posts

Drives: 08 128i 6sp, 14 X5 x35i
Join Date: Oct 2012
Location: Mill Creek, WA

iTrader: (1)

Quote:
Originally Posted by E91WAG3N View Post
Quote:
Originally Posted by Sliver_Legend View Post
so I did it. mpg isn't terrible. I drive 15 minutes on the highway everyday. at 70-75 mph I'm pushing 3k rpm. beyond that no issues. the launch is way better. I'm not upset that I did it at all.
I have a similar commute. Well, I did before work from home.

Would the ratio being slightly less aggressive help at all in your opinion? There is also a 3.62 from a 330i that I'm considering for my E91.
Quote:
Originally Posted by E91WAG3N View Post
Quote:
Originally Posted by Sliver_Legend View Post
so I did it. mpg isn't terrible. I drive 15 minutes on the highway everyday. at 70-75 mph I'm pushing 3k rpm. beyond that no issues. the launch is way better. I'm not upset that I did it at all.
I have a similar commute. Well, I did before work from home.

Would the ratio being slightly less aggressive help at all in your opinion? There is also a 3.62 from a 330i that I'm considering for my E91.
I considered the same. But that 330i diff is different and has a guibo type connection. So it's not a direct fit for later cars. Same with the 3.91 from the xdrive cars. So 3.73 is the plug n play approach.
Appreciate 1
E91WAG3N659.50

      09-23-2020, 12:27 PM   #78
E91WAG3N
aka UberSteuer
E91WAG3N's Avatar
United_States
660
Rep
945
Posts

Drives: E91, E91
Join Date: Sep 2015
Location: Las Vegas

iTrader: (2)

Quote:
Originally Posted by markslc1 View Post
I considered the same. But that 330i diff is different and has a guibo type connection. So it's not a direct fit for later cars. Same with the 3.91 from the xdrive cars. So 3.73 is the plug n play approach.
You're a life saver, looks like it's 3.73 or bust (or $$$ on an LSD). I changed diff oil on one of my E91s and my old E82 and can't recall ever actually looking at the input side of the diff. Just looked on realoem and the 330i setup is indeed different. Now I'm itching to get under the cars after work to check things out.
__________________
Instagram @E91WAG3N
Appreciate 0
      09-24-2020, 08:05 PM   #79
Sliver_Legend
New Member
8
Rep
18
Posts

Drives: 2009 128i
Join Date: Aug 2020
Location: Greensboro NC

iTrader: (0)

Garage List
2009 bmw 128i  [0.00]
only thing I don't like is I don't feel comfortable doing 80. revs too high for me
Appreciate 0
      09-24-2020, 09:36 PM   #80
Ric in RVA
Bergspyder
Ric in RVA's Avatar
United_States
804
Rep
961
Posts

Drives: '11 BMW 128i Sport 6mt
Join Date: Oct 2015
Location: Richmond VA

iTrader: (1)

Quote:
Originally Posted by Sliver_Legend View Post
only thing I don't like is I don't feel comfortable doing 80. revs too high for me
Why mine is for sale!!!! PM me if you want a nice 60k 3.73 for $150 bucks.
__________________
Ric in RVA

2011 128i 6 MT Sport, 10 Land Rover LR4, 2011 528i N52, 18 F150 Platinum, Sequoia, a few motorcycles.
Appreciate 0
      09-25-2020, 05:40 AM   #81
Papa Popov
Enlisted Member
6
Rep
41
Posts

Drives: 2009 128i 6MT
Join Date: Mar 2020
Location: SC

iTrader: (0)

Garage List
Quote:
Originally Posted by Ric in RVA View Post
Still haven't found time to do mine. But I did find some online info and make up a simple table of speed in gears.

3.23

Oem tire
Tire Width (mm):205
Tire Aspect Ratio:50
Wheel Size (inches):17
Diameter: 25.1"

Engine Redline RPM:
7000


1st Gear: 4.32. 37.4 MPH
2nd Gear: 2.46. 65.7 MPH
3rd Gear: 1.660 97.4 MPH
4th Gear: 1.230 131.4 MPH
5th Gear: 1.000 161.6 MPH
6th Gear: 0.850 190.2 MPH
Final: 3.230 (Getrag)

Cruising Speed (MPH): 80
Cruising RPM: 2945 RPM


3.73

3.73 3.23

1st Gear: 32.4 MPH. vs stock 37.34
2nd Gear: 56.9 MPH. vs stock 65.7
3rd Gear: 84.3 MPH. vs stock 97.4
4th Gear: 113.8 MPH vs stock 131.4
5th Gear: 140.0 MP. . vs stock 161.6
6th Gear: 164.7 MPH vs stock 190.2
Final:
3.730 (Getrag)

Cruising Speed (MPH): 80
Cruising RPM: 3401 RPM
3400 @ 80mph, big oof. Would love to do this swap, but unfortunately everyone on I-85S drives like a bat outta hell. Cruising @ 85mph sounds like an MPG nightmare with that ratio. Toss the a muffler delete into the equation and that does not sound like a good time...
Appreciate 1
      09-25-2020, 06:55 AM   #82
minirips2
Second Lieutenant
193
Rep
265
Posts

Drives: 2010 128i 6M CR Slicktop
Join Date: Mar 2017
Location: Illinois

iTrader: (1)

Quote:
Originally Posted by Papa Popov View Post
3400 @ 80mph, big oof. Would love to do this swap, but unfortunately everyone on I-85S drives like a bat outta hell. Cruising @ 85mph sounds like an MPG nightmare with that ratio. Toss the a muffler delete into the equation and that does not sound like a good time...
I'm with you. I go 35 miles each way on the tollway for my commute. If I drive easy, I get 30-32mpg, verified at the gas pump. I hear people complain about mileage on 128i's, but I think they do pretty well for a 3 liter engine.
Appreciate 0
      09-26-2020, 04:06 AM   #83
tree233
Enlisted Member
5
Rep
37
Posts

Drives: 2006 130i hotrod
Join Date: Dec 2017
Location: Sydney Australia

iTrader: (0)

Quote:
Originally Posted by jonwilli View Post
I'll be interested to hear your thoughts on the 3.91 diff. I currently have a 3.91 diff from a 328xi coming from the US to the UK to fit to my E81 130i.
Hey mate, mine is finally done! Definitely more responsive and pulls harder. The gearing suits mountain roads sooo much better! I'm loving it!!!

It was more complicated to install that I expected. The 130i has the dual guibo tailshaft, whereas the e93 325i has the uni joint at the end of the tailshaft. I thought it was as simple as swapping the diff input flange off the 130i pinion onto the e93 pinion, but it turns out that the 130i pinion has an aligning pin that sticks out the end and goes into the guibo to keep it perfectly centered and prevent vibration.

Sooo, the solution was to swap the back half of my tailshaft to one that has the uni joint at the end. The e82 125i tailshaft is best for that as it's still e8x therefore is the correct length, and the measurement from the CSB to the 188 diff flange is consistent. Then just get the 130i front half & the 125i back half balanced together & install!

Does the US 328ix have a guibo at the back end of the tailshaft?
Appreciate 1
ornicar44.50

Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -5. The time now is 07:30 AM.




1addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST