M3 LSD 3.23

[wulley1]

I saw a used M3 LSD diff with 3.23:1 gearing. the auction on ebay I think ended for $425 plus $75 for shipping. It seems like a good mod to help get that torque to wheels better.

I have two questions, how do you correct the speedo.


Would this switch in diffs affect the torque converter on my automatic. I thought the torque converter was speced out by the gearing and cam profiles.

[Autotechnica]

What's your stock diff ratio? Also, what do you mean by how do you correct the speedo? I wasn't aware there would be a problem with the speedo.

Bry

[thekid]

Originally posted by wulley1@Jul 15 2004, 01:08 PM
I saw a used M3 LSD diff with 3.23:1 gearing. the auction on ebay I think ended for $425 plus $75 for shipping. It seems like a good mod to help get that torque to wheels better.

I have two questions, how do you correct the speedo.


Would this switch in diffs affect the torque converter on my automatic. I thought the torque converter was speced out by the gearing and cam profiles.

is it a diff from M3 auto? Also what kind of BMW do you have now?

[jrhaile]

bah.. too much money. Call up John's LKQ in Oregon. I got myself a 3:15LSD for 345 shipped.. also it doesn't effect your speedo or at least it didn't in my car.

[bitcore]

Originally posted by jrhaile@Jul 15 2004, 02:30 PM
bah.. too much money. Call up John's LKQ in Oregon. I got myself a 3:15LSD for 345 shipped.. also it doesn't effect your speedo or at least it didn't in my car.

Omg, used or new, and do they have a website?

[jrhaile]

go to home.comcast.net/~95325i

I have a link on there...

[Kevin325i]

Speed sensor is in the differential itself, the problem you run into is wiring it up to work with the speedo, no correction needed.

The 3.23 would be way to low for your car, it's probably got a 3.91 in it right now if it's an auto. You'll have to get the LSD off an auto M3, but it might be the same gearing as what you've got.

Kevin

[Furious]

id love a 3:23 , i currently have the 3:15 lsd, anyone want longer gears? im willing to trade..

[wulley1]

I didn't know there would be a diference in the diff gearing of an auto or a manual. Where could I find out what the diff gearing of a 97 328iS would be.

Seems like it would be hard to find an M3 diff from an auto. Who the hell would buy and M3 and ask for an auto?

[Kevin325i]

3.91 if I'm not mistaken, you could try and get a 4.0 if you wanted, but I'm pretty sure the M3 auto using the same differential.

[Autotechnica]

auto tranny's have very high (close ratio) diffs. It would be quite hard to find one from an auto M3. Quaife has gone down in a price A LOT these past few years. I see them selling for $600-$900 for a custom ratio LSD. You should check them out.

Anyways, I thought speed sensors were for the ABS systems.

Bry

[thekid]

Originally posted by wulley1@Jul 15 2004, 04:58 PM
I didn't know there would be a diference in the diff gearing of an auto or a manual. Where could I find out what the diff gearing of a 97 328iS would be.

Seems like it would be hard to find an M3 diff from an auto. Who the hell would buy and M3 and ask for an auto?

exactly. Your car would die with that diff in it. The auto diff in the 318i is 4.44. It's crazy insane high.

[wulley1]

that is insane. I'll have to keep looking around to find out what the auto 328 came with.

[fushuman]

What would be good for a 318i, 5spd?

[jrhaile]

I have a used 3:45 in my garage which is badass for racing, but top speed is like 115. You get through your gears so fast lol... anyone want it? cheap cheap