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Old 05-12-2004, 12:37 PM   #21
slow323ci
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Quote:
Originally Posted by teamdfl
3.64 from a Z4 2.5
I'm guessing that would be really expensive, if 3.38's from much more common 330's are going for $750 or more.
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Old 05-12-2004, 12:43 PM   #22
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I just called a junk yard around my area, and they said the only available 3.46's they could find for me was, one guy tryin to sell them for $850. But they were of a 2004 325 so I guess they're low miles. Still tooo damn much in my opinion.

btw would a diff. (aka differential assembly) off a 1998 323i fit a 2002 325?
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Old 05-12-2004, 01:02 PM   #23
slow323ci
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Quote:
Originally Posted by Cypherd8
btw would a diff. (aka differential assembly) off a 1998 323i fit a 2002 325?
No, '98 323 is E36 chassis.

You should be able to find a 3.46 for under $300 with ease. Any 2.5L E46 coupe or sedan with an automatic transmission has a 3.46.
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Old 05-12-2004, 01:52 PM   #24
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Quote:
Originally Posted by slow323ci
No, '98 323 is E36 chassis.

You should be able to find a 3.46 for under $300 with ease. Any 2.5L E46 coupe or sedan with an automatic transmission has a 3.46.
Okay here's a curve ball for ya, what about in an Xi model. I'm rolling a 330Xi, could I swap gears in that, would I have to do front and back?
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Old 05-12-2004, 02:14 PM   #25
slow323ci
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Quote:
Originally Posted by Espeedy
Okay here's a curve ball for ya, what about in an Xi model. I'm rolling a 330Xi, could I swap gears in that, would I have to do front and back?
Never heard of anyone trying it on an Xi. I'm guessing you would need to swap both diffs, but I don't know...
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Old 05-12-2004, 02:18 PM   #26
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Quote:
Originally Posted by Espeedy
Okay here's a curve ball for ya, what about in an Xi model. I'm rolling a 330Xi, could I swap gears in that, would I have to do front and back?
slow is right, you need to change the front and back on the awd models
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Old 05-12-2004, 02:39 PM   #27
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I figured as much. First I need to figure out what the stock ones are, 3.46 all around or is back different from the front.
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Old 05-12-2004, 02:43 PM   #28
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Quote:
Originally Posted by Espeedy
I figured as much. First I need to figure out what the stock ones are, 3.46 all around or is back different from the front.
not sure if they are different, but i could see how you could get yourself in a whole world of trouble changing diff ratios on an awd if the front and back wheels are made to turn at different rates
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Old 05-12-2004, 02:45 PM   #29
RonnieRenaldi
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Quote:
Originally Posted by bbh03
How much did that 3.15 come to if you dont mind me asking? They seem to be alot more than 3.46s.
I have my 3.15 rear diff from 2000 323Ci manual with 39K miles for sale.
PM me with your offer if interested.
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Old 05-12-2004, 02:47 PM   #30
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Quote:
Originally Posted by slow323ci
Hmmm, things I did to make my 323 quicker, in order of improvement:

- 3.46 differential swap made by far the biggest difference
- Conforti Shark software
- Conforti intake
- Borla exhaust
- Plasma Direct ignition coils
Are the plasma direct ignition coils make huge difference in hp/tq ?
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Old 05-12-2004, 02:49 PM   #31
Dinizzle
 
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Quote:
Originally Posted by ///ACS-3
I have my 3.15 rear diff from 2000 323Ci manual with 39K miles for sale.
PM me with your offer if interested.
weren't those 3.07's?? if I'm wrong then I have a correction to make in my ad in the classifieds....
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Old 05-12-2004, 03:16 PM   #32
slow323ci
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Quote:
Originally Posted by ///ACS-3
I have my 3.15 rear diff from 2000 323Ci manual with 39K miles for sale.
PM me with your offer if interested.
Manual transmission 323Ci's came with a 3.07. Manual transmission 325Ci's came with a 3.15.
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Old 05-12-2004, 04:28 PM   #33
RaNDaLLsAxToN
 
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what gear does my 330 auto sedan have?
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Old 05-12-2004, 05:07 PM   #34
Synonymous
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Quote:
Originally Posted by RaNDaLLsAxToN
what gear does my 330 auto sedan have?
3.38
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Old 05-12-2004, 05:12 PM   #35
slow323ci
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Quote:
Originally Posted by ///ACS-3
Are the plasma direct ignition coils make huge difference in hp/tq ?
No. The car does seem to run smoother and rev up smoother. But that could be due to the fact that one or more of my old coils were in bad shape. I replaced the OEM coils with the plasma direct ones since I was going to replace all the coils anyway, and the fancy ones were only a little more expensive so I figured I'd give them a try. They don't suck but they are not miracles, either.
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Old 11-14-2013, 10:26 AM   #36
Glory22
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Anyone know what gear ratio is in an automatic 323? And if there are any other models that use the same ratio?

Last edited by Glory22; 11-14-2013 at 10:32 AM.
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Old 11-14-2013, 10:49 AM   #37
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Re: Gears on a BMW?

Strong 9 year bump

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Old 11-14-2013, 12:03 PM   #38
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You know it.
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Old 11-14-2013, 01:42 PM   #39
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Gears on a BMW?

My Touring came with the 3:46 gear set. I've always wished it had a 3:07 gear set. Freeway engine speed is up there....


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Old 12-06-2013, 03:50 PM   #40
Rotten Robbie
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A dumb question, but I don't know how to tell what ratio my rear differential is...
I have a 325i 5speed, and at 70mph on flat ground I'm turning exactly 3000 rpm.
Is the differential ratio stamped somewhere, or encoded in the vin # ?

I think I need to replace it because it is making a clunking noise and seems to have a lot of play.
I especially notice it at low speeds on uneven ground.
I heard that something can break inside the diff, and cause this to happen. (?)
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