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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 11-22-2005, 08:23 PM   #1 (permalink)
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What Final drive ratio (gears) 90 325is have ???

What Final drive ratio (gears) 90 325is have ??? ,its 5 speed
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I'm from Bosnia / Europe ,4 years ago i move to Erie , PA USA ,my English is sux ,so please don't critize me

89 BMW 325i coupe http://www.cardomain.com/ride/358997/3
88 325ix
94 Mustang GT verthttp://www.cardomain.com/ride/358997/1
87 BMW M3 swap(clone M3) http://www.cardomain.com/ride/358997/5 (Back in Bosnia)
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Old 11-22-2005, 11:43 PM   #2 (permalink)
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Your 325is should have a 3.73:1 final drive
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Old 11-23-2005, 12:08 AM   #3 (permalink)
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Its not my car, i have 89 325i ,this 90 325is i talkin about is from one guy in town,and he claim that his car have 4.10s used:
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I'm from Bosnia / Europe ,4 years ago i move to Erie , PA USA ,my English is sux ,so please don't critize me

89 BMW 325i coupe http://www.cardomain.com/ride/358997/3
88 325ix
94 Mustang GT verthttp://www.cardomain.com/ride/358997/1
87 BMW M3 swap(clone M3) http://www.cardomain.com/ride/358997/5 (Back in Bosnia)
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Old 11-29-2005, 12:54 AM   #4 (permalink)
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they did put a 4.10 in some e30s... i think 318is
but the 325i always came with the 3.73
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Old 11-29-2005, 01:20 AM   #5 (permalink)
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Quote:
Originally Posted by Silverhks
they did put a 4.10 in some e30s... i think 318is
but the 325i always came with the 3.73
How about 325i / is autos in E30s ???
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I'm from Bosnia / Europe ,4 years ago i move to Erie , PA USA ,my English is sux ,so please don't critize me

89 BMW 325i coupe http://www.cardomain.com/ride/358997/3
88 325ix
94 Mustang GT verthttp://www.cardomain.com/ride/358997/1
87 BMW M3 swap(clone M3) http://www.cardomain.com/ride/358997/5 (Back in Bosnia)
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Old 11-30-2005, 10:32 PM   #6 (permalink)
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Final Drive Ratio

I belive your rear-end is LSD and it's a 3.73:1. I know my car (91 318is) has a 4:11:1 LSD rear end in it, and the drop-top 318i has a 4.27:1 rear end. It's the most gear-reduced rear end for e30s.

Course, if you wanna be sure, you can just look for the code on the metal tab that's screwed onto the case =) LSD's have the prefix S on them. For example, if you look on your final drive and you see the metal tag and it says:

S 3:73 2004

Or whatever, that means it's an LSD with a 3:73:1 ratio and the model is 2004, or whatever.

The tranny ratios depend on what tranny you have, but I'm guessing it's the Getrag 240/260. The 240's ratios are:

1st: 3.72:1
2nd: 2.02:1
3rd: 1.32:1
4th: 1:1 (direct drive)
5th: 0.81:1 (overdrive)
reverse: 3.45:1

.. and the 260:

1st: 3.83:1
2nd: 2.20:1
3rd: 1.40:1
4th: 1:1
5th: 0.81:1
reverse: 3.46:1

Info taken from AllData (my schools program). Hope this helps!
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Old 12-01-2005, 12:23 AM   #7 (permalink)
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Well i will make trip to this guy and go under rear end and see what gear he have
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I'm from Bosnia / Europe ,4 years ago i move to Erie , PA USA ,my English is sux ,so please don't critize me

89 BMW 325i coupe http://www.cardomain.com/ride/358997/3
88 325ix
94 Mustang GT verthttp://www.cardomain.com/ride/358997/1
87 BMW M3 swap(clone M3) http://www.cardomain.com/ride/358997/5 (Back in Bosnia)
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