Diff ratio change ,need help please

[kovacskl]

Hi guys ,i was reading your threads ,and i was wondering if you could help me .
I do drift and it's a batle because nobody want's to help you with litle car setup so for me is hard because every competition i change something on my car as i hear something new .Well i have a M3 e36 3.0 l and i have very low power on lower rpm where in drift we need strong cars even on low rpm ,i would like to change my diff ration to a 3,65 or lower for power ,anywhere close to 4 .Could you help me what diff should i take to fit my car ?
Thank you .

[Spyke]

Not too sure on what diff/ratio would be best for you... But if you have already done the work to figure out your preferred gearing, you would be looking for a 4.10 or 3.91

[kovacskl]

Not too sure on what diff/ratio would be best for you... But if you have already done the work to figure out your preferred gearing, you would be looking for a 4.10 or 3.91

Thank's for your suggestion ,do you know where could i find one ,i mean what models would fit mine .At first i was thinking of 4.10 or 3.91 but i was afraid to not be to radical .But hey ... that's why life is wonderfull ... we can try it all .Whell if you could help me with some car model that would fit mine would be great ,i mean change the inside or the entire diff .
Thanks again .

[Moron95M3]

and run smaller tires at drift events?

[flyfishvt]

any e36 325,323,328, m3 that came with an auto tranny will have a (correct me if I'm wrong) 415 dif. or is it 410? Its one of those two. and that dif will fit right into your car. The downside is your gas mileage will suffer and you'll be turning about 4k rpm at 70mph instead of 3k with a stock 315 dif. Don't get one from a 318 e36. It won't be the correct size.

[Moron95M3]

any e36 325,323,328, m3 that came with an auto tranny will have a (correct me if I'm wrong) 415 dif. or is it 410? Its one of those two. and that dif will fit right into your car. The downside is your gas mileage will suffer and you'll be turning about 4k rpm at 70mph instead of 3k with a stock 315 dif. Don't get one from a 318 e36. It won't be the correct size.

3.91 or 4.10 IIRC.

However, you'd want an LSD for drifting...unless you plan to weld it up.

Also - he most likely has a 6spd...which has different trans gearing obviously.

[kovacskl]

The mileage doesn't bother me because i use it mostly for drifting or a sunday drive ,and i have a obx LSD ,witch i was sceptical at first but i have been allready in few competitions and it's working great . My diff is the m3 i think is the 210 tipe .So you think the automatic models would fit etirely or swap the interiors ?
i have just the 5 gear from the 3.0 l engine .
Thanks again .

[Spyke]

We don't often get 210 diffs over here, so I'm not too sure...

However 3.91 is a SUPER common combo for your car and what you're doing. That should be easy to source from an auto (they're in the classifieds all the time) and possibly an auto M3 would have the LSD + 3.91 ratio you're looking for.

[kovacskl]

thank you very much for your advice ,i will look in to find a 3.91 automatic wich is gonna be hard beause i'm in europe , but anyway thank you

[Spyke]

The good thing (for you) is that our dollar is so weak, if you can't find one on your soil, you can buy one and have it shipped from the US for much cheaper... or at least the same price.