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What Final drive ratio (gears) 90 325is have ???

1K views 6 replies 3 participants last post by  Slow325i 
#1 ·
What Final drive ratio (gears) 90 325is have ??? ,its 5 speed
 
#3 ·
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 :confused:
 
#5 ·
Silverhks said:
they did put a 4.10 in some e30s... i think 318is :unsure:
but the 325i always came with the 3.73
How about 325i / is autos in E30s ???
 
#6 ·
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!
 
#7 ·
Well i will make trip to this guy and go under rear end and see what gear he have
 
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