330i Gear Ratio?

shift330 · 07-30-2009, 08:25 PM

I can't, for the life of me, find the info on the rear end gear ratio for the 06 330i 6MT. Anyone know it? Thanks

shift330 · 07-30-2009, 08:37 PM

Quote:

Originally Posted by e90David

isn't it 3.15

i'll try to find it

Thanks, I looked here and google and I know I've seen it before but now can't find it. Just trying to see if going to a 3.73 open diff would be worth it

shift330 · 07-30-2009, 08:54 PM

Yeah, if I can haggle him down another $100 I'm getting it

200Duece · 07-30-2009, 09:39 PM

I think it is 3.23:1

Pyrat 2 · 07-30-2009, 11:06 PM

Definately a 3.15 for the MT. I had mine swapped out to a 3.38 LSD. A 3.73 is a really high ratio for this car - better get it with an LSD to keep the power down.

shift330 · 07-30-2009, 11:10 PM

Quote:

Originally Posted by HeelToe

Definately a 3.15 for the MT. I had mine swapped out to a 3.38 LSD. A 3.73 is a really high ratio for this car - better get it with an LSD to keep the power down.

I hope it makes a significant power gain from a dead stop. It drives me nuts how poorly it launches even with the RPM's up. I want violence at the stoplight every now and then.

Pyrat 2 · 07-30-2009, 11:19 PM

Quote:

Originally Posted by shift330

I hope it makes a significant power gain from a dead stop. It drives me nuts how poorly it launches even with the RPM's up. I want violence at the stoplight every now and then.

I'm pretty confident that the 3.73 with an open diff will give you violence (and a larger tire bill if abused). If you want the full acceleration benefit get the LSD with it.

chaz58 · 08-01-2009, 09:39 PM

The manual cars are geared way too high. The good news is that it is much easier to find an automatic diff because manuals are fairly rare.

T7R_Sky · 08-06-2009, 01:17 PM

Where are you guys looking to find new diffs for our cars? I want to look into this but dont know where to start.

mastermayhm · 08-06-2009, 02:04 PM

haha violence...id like to see how this turns out for you, im interested as well

TSM330i · 08-06-2009, 02:33 PM

Quote:

Originally Posted by T7R_Sky

Where are you guys looking to find new diffs for our cars? I want to look into this but dont know where to start.

One option here:
http://www.e90post.com/forums/showth...19#post5657019

Pyrat 2 · 08-06-2009, 06:30 PM

Diffs for an NA are definately available. You can get them from at least the following:
Your dealer (some will also do an LSD install into an existing diff)
Diffsonline.com
performancegearing.com

AW325xi picked one up from diffsonline as mentioned above. I piccked mine up from Performance Gearing.

http://www.e90post.com/forums/showthread.php?t=226769

dro325 · 08-11-2009, 08:43 PM

HeelToe I know you said your 330i had a 3.15 ratio MT. I have a 325 MT so I am guessing its a 3.23. Are the differentials (carrier) interchangeable between automatic or manual, or 325 or 330??? I can get a 3.64 ratio from a 330 AT fairly cheap so I wanna know if I can install it and get the feeling for the ratio change and depending on that take the plunge for a LSD. Thanks!

Pyrat 2 · 08-11-2009, 09:20 PM

You should double check with the pros at one of the places I mentioned in my previous post. When I talked to Jim Blanton at Performance Gearing I remember him telling me that the guibo setup on the 330i was unique and had a relationship to the diff design that prevented interchangeability with other e90 gearsets.

smellthebeans · 08-12-2009, 10:28 AM

Quote:

Originally Posted by HeelToe

You should double check with the pros at one of the places I mentioned in my previous post. When I talked to Jim Blanton at Performance Gearing I remember him telling me that the guibo setup on the 330i was unique and had a relationship to the diff design that prevented interchangeability with other e90 gearsets.

The guibo sits adjacent to the output shaft on the transmission. I dont see how swapping out the ring and pinion or the carrier would affect that. Maybe Mr. Blanton knows something I dont? Several people on this board have had the guts replaced with lower gears and a LSD. With no i'll effects.

I also find it difficult to believe BMW would cast different differential housings for the same model cars. IOT keep costs down manufactures keep as much in common as possible. I think all E90 series differentials are interchangeable.

TSM330i · 08-12-2009, 03:09 PM

Quote:

Originally Posted by HeelToe

You should double check with the pros at one of the places I mentioned in my previous post. When I talked to Jim Blanton at Performance Gearing I remember him telling me that the guibo setup on the 330i was unique and had a relationship to the diff design that prevented interchangeability with other e90 gearsets.

He's right. Dan at Diffsonline said the exact same thing.

Pyrat 2 · 08-12-2009, 07:51 PM

Quote:

Originally Posted by smellthebeans

The guibo sits adjacent to the output shaft on the transmission. I dont see how swapping out the ring and pinion or the carrier would affect that. Maybe Mr. Blanton knows something I dont? Several people on this board have had the guts replaced with lower gears and a LSD. With no i'll effects.

I also find it difficult to believe BMW would cast different differential housings for the same model cars. IOT keep costs down manufactures keep as much in common as possible. I think all E90 series differentials are interchangeable.

I don't disagree with your logic. Nevertheless, both vendors have stated the same thing. These guys both specialize in BMW diffs. I have only seen one person with a 3.46 on an NA/330i and that person is in Austria. When I requested the parts from that diff here in the US last year when I ordered mine, Performance Gearing told me they could not get them

Maybe you can get them now but it sounds like AW325xi just got the same story.

All other NA 330 diffs I've seen on this forum have been 3.38 or 3.64. Probably worth a call to one of these vendors or an alternate that you prefer. You'll find out for sure when you order.

Dr.Sommer · 08-13-2009, 06:32 AM

Quote:

Originally Posted by HeelToe

I have only seen one person with a 3.46 on an NA/330i and that person is in Austria.

It's me...

If you look it up in realoem.com (drive shaft section), you can see the exact difference: The 330i has a drive shaft with 2 guibo's (one front, 2nd rear) and 1 U-Joint. 325i has only 1 guibo front but 2 U-Joints instead, therfore the input flange on the diff is defferent to the 330i. Question is, if the input flanges are interchangeable? The diff housings of all E90s are the same.

330i:
http://www.realoem.com/bmw/showparts...18&hg=26&fg=10

325i:
http://www.realoem.com/bmw/showparts...17&hg=26&fg=10

dro325 · 08-13-2009, 10:37 AM

Thanks Sommer, my idea is a no go then. Time to save up for the LSD then.

2006330iFTW · 09-09-2009, 02:29 PM

Transmission: 6-speed manual
Gear Ratio Overall ratio (Rpm) Mph
1st 4.35:1 13.70:1 (7000) 39
2nd 2.50:1 7.88:1 (7000) 68
3rd 1.67:1 5.26:1 (7000) 102
4th 1.23:1 3.87:1 est (6600) 130*
5th 1.00:1 3.15:1 est (5400) 130*
6th 0.85:1 2.68:1 est (4560) 130*
Final drive ratio……….................................3.15:1
Engine rpm @ 60 mph in top gear……….......2100

this is from road and track

07-30-2009, 08:25 PM	#1
shift330 Blue Force Tracker 124 Rep 1,372 Posts Drives: 2010 Hyundai Genesis Coupe Join Date: Feb 2008 Location: Sierra Vista, AZ iTrader: (6) Garage List 2006 330i [0.00]	330i Gear Ratio? I can't, for the life of me, find the info on the rear end gear ratio for the 06 330i 6MT. Anyone know it? Thanks __________________ Stay safe 855th MP Company! Hosmer/Espinoza you're my boys!!
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07-30-2009, 08:54 PM	#3
shift330 Blue Force Tracker 124 Rep 1,372 Posts Drives: 2010 Hyundai Genesis Coupe Join Date: Feb 2008 Location: Sierra Vista, AZ iTrader: (6) Garage List 2006 330i [0.00]	Yeah, if I can haggle him down another $100 I'm getting it __________________ Stay safe 855th MP Company! Hosmer/Espinoza you're my boys!!
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07-30-2009, 09:39 PM	#4
200Duece Colonel 45 Rep 2,575 Posts Drives: '73 2002,'18 X5 35d,'17 328d T Join Date: Jan 2007 Location: A Whale's Vagina, Ca iTrader: (5)	I think it is 3.23:1 __________________ 1988 E28 535is Euro Conversion --- sold 2009 E90 335 6MT --- sold 2003 E39 540iT Msport --- sold
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07-30-2009, 11:06 PM	#5
Pyrat 2 Colonel 1421 Rep 2,560 Posts Drives: Rapidly from A to B Join Date: Jun 2005 Location: Chicago 'burbs or TN Smokies iTrader: (3) Garage List 2022 Porsche GT4 [9.64] 2018 Porsche GT3 [9.33] 2007 Z4 M Roadster [8.33] 2020 BMW X1 [0.00]	Definately a 3.15 for the MT. I had mine swapped out to a 3.38 LSD. A 3.73 is a really high ratio for this car - better get it with an LSD to keep the power down. __________________ '07 Z4MR '22 GT4 '18 GT3 '16 GT4, '16 M2, '14 X1, '13 135is, '06 330i, '03 323 Ci, '01 330i, '99 M3 (RIP), '96 318is, some non-BMWs
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08-01-2009, 09:39 PM	#8
chaz58 Captain 15 Rep 701 Posts Drives: 328iT Join Date: Oct 2007 Location: Detroit Burbs iTrader: (0)	The manual cars are geared way too high. The good news is that it is much easier to find an automatic diff because manuals are fairly rare. __________________ _________________________________________________
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08-06-2009, 01:17 PM	#9
T7R_Sky "I know you know that I know you know..." 24 Rep 795 Posts Drives: Sparkling Graphite E90 328i Join Date: Mar 2006 Location: Escondido, CA iTrader: (3) Garage List 2008 E90 328i [0.00]	Where are you guys looking to find new diffs for our cars? I want to look into this but dont know where to start.
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08-06-2009, 02:04 PM	#10
mastermayhm Brigadier General 271 Rep 4,773 Posts Drives: F90 M5 Join Date: Sep 2008 Location: INPLS, IN iTrader: (13)	haha violence...id like to see how this turns out for you, im interested as well __________________ e90 330 > e90 LCI N54 > e70 x5 50i > f12 M6 GC > f15 x5 50i > f90 M5
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08-06-2009, 06:30 PM	#12
Pyrat 2 Colonel 1421 Rep 2,560 Posts Drives: Rapidly from A to B Join Date: Jun 2005 Location: Chicago 'burbs or TN Smokies iTrader: (3) Garage List 2022 Porsche GT4 [9.64] 2018 Porsche GT3 [9.33] 2007 Z4 M Roadster [8.33] 2020 BMW X1 [0.00]	Diffs for an NA are definately available. You can get them from at least the following: Your dealer (some will also do an LSD install into an existing diff) Diffsonline.com performancegearing.com AW325xi picked one up from diffsonline as mentioned above. I piccked mine up from Performance Gearing. http://www.e90post.com/forums/showthread.php?t=226769 __________________ '07 Z4MR '22 GT4 '18 GT3 '16 GT4, '16 M2, '14 X1, '13 135is, '06 330i, '03 323 Ci, '01 330i, '99 M3 (RIP), '96 318is, some non-BMWs
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08-11-2009, 08:43 PM	#13
dro325 Enlisted Member 1 Rep 30 Posts Drives: 06' E90 Sport Pkg Join Date: May 2009 Location: Michigan iTrader: (0)	HeelToe I know you said your 330i had a 3.15 ratio MT. I have a 325 MT so I am guessing its a 3.23. Are the differentials (carrier) interchangeable between automatic or manual, or 325 or 330??? I can get a 3.64 ratio from a 330 AT fairly cheap so I wanna know if I can install it and get the feeling for the ratio change and depending on that take the plunge for a LSD. Thanks! __________________ Jet Black, 35% tint, Stock
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08-11-2009, 09:20 PM	#14
Pyrat 2 Colonel 1421 Rep 2,560 Posts Drives: Rapidly from A to B Join Date: Jun 2005 Location: Chicago 'burbs or TN Smokies iTrader: (3) Garage List 2022 Porsche GT4 [9.64] 2018 Porsche GT3 [9.33] 2007 Z4 M Roadster [8.33] 2020 BMW X1 [0.00]	You should double check with the pros at one of the places I mentioned in my previous post. When I talked to Jim Blanton at Performance Gearing I remember him telling me that the guibo setup on the 330i was unique and had a relationship to the diff design that prevented interchangeability with other e90 gearsets. __________________ '07 Z4MR '22 GT4 '18 GT3 '16 GT4, '16 M2, '14 X1, '13 135is, '06 330i, '03 323 Ci, '01 330i, '99 M3 (RIP), '96 318is, some non-BMWs
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08-13-2009, 10:37 AM	#19
dro325 Enlisted Member 1 Rep 30 Posts Drives: 06' E90 Sport Pkg Join Date: May 2009 Location: Michigan iTrader: (0)	Thanks Sommer, my idea is a no go then. Time to save up for the LSD then. __________________ Jet Black, 35% tint, Stock
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09-09-2009, 02:29 PM	#20
2006330iFTW Private First Class 9 Rep 142 Posts Drives: 2006 330i Join Date: Apr 2009 Location: New York iTrader: (1) Garage List 2006 330i [0.00]	Transmission: 6-speed manual Gear Ratio Overall ratio (Rpm) Mph 1st 4.35:1 13.70:1 (7000) 39 2nd 2.50:1 7.88:1 (7000) 68 3rd 1.67:1 5.26:1 (7000) 102 4th 1.23:1 3.87:1 est (6600) 130* 5th 1.00:1 3.15:1 est (5400) 130* 6th 0.85:1 2.68:1 est (4560) 130* Final drive ratio……….................................3.15:1 Engine rpm @ 60 mph in top gear……….......2100 this is from road and track
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