m3 diff == owned

[stichris]

Found the cause of the strange vibration in my m3. Part of the rear diff's ring & pinion was liberated.

[Twin_Cam]

Ooooooooohhhhhhh that's fun.

[Matthew]

User error.

[Aaron]

Nah, BMW just threw in a few extra parts. It'll be fiiiine.

[MuddyREX]

How big is that actual chunk? Is it a tooth from the diff?

[teh DIRT]

i held it in my hand last nite. id say its about an inch long....maybe 1/2inch wide

[the mike]

It's a full tooth off the ring gear.
Sucks, man. More miles on the STi.

[black05rsx-s]

isnt that a problem with m3s my buddy had his replaced twice before he totaled his

[Silverfc88]

Damn! What made you think to check the diff?

[stichris]

I wouldn't say the e36 diff is inherently weak...

I started gettng a vibration under load, so it was one of the first few things I checked.

[Urinemachine]

Originally Posted by stichris

I wouldn't say the e36 diff is inherently weak...

I started gettng a vibration under load, so it was one of the first few things I checked.

He's thinking of the infamous diff bolt.. which is inherently weak

[themadhatter]

Originally Posted by stichris

I wouldn't say the e36 diff is inherently weak...

I started gettng a vibration under load, so it was one of the first few things I checked.

depends...what year is the M3 again? the '95 M3s are known to have internal bolts back out (not the diff bolt) and cause havoc internally.

if you're looking for a new or rebuilt unit that will be solid, give Dan a holler at diffsonline.com

-Ron

[Matthew]

Originally Posted by themadhatter

if you're looking for a new or rebuilt unit that will be solid, give Dan a holler at diffsonline.com

-Ron

Dan =

Chris is going to use my stock 3.46 with 24k miles on it... I went with a 3.46 with 40% lock...

[themadhatter]

Originally Posted by Matthew

Dan =

Chris is going to use my stock 3.46 with 24k miles on it... I went with a 3.46 with 40% lock...

very nice!

I had a 3.38 that I recently sold and slapped in a 3.15. I'll soon be going for a 2.93 40% from Dan as well. it's going to be F'ing nutz.

[Matthew]

Originally Posted by themadhatter

very nice!

I had a 3.38 that I recently sold and slapped in a 3.15. I'll soon be going for a 2.93 40% from Dan as well. it's going to be F'ing nutz.

Well I was thinking of getting a built 2.93 from Dan, but after talking to Josh it looks like I am going to have him build a 3.15 for me. I am not going to run WTF boost for a while. Of course now that AA is going to release the twinscrew... I am torn again.

[themadhatter]

a good guess says that AA's twin screw is from Stimpee's research and hard work.

I'm gonna be running the 3.15 till I either blow it up or get bored of it, either way, it's nearly brand new with only 26k on it. :D

I will be running a max of 12-14 PSI, I figure the 2.93 gearing will come in handy for power delivery and will have the added side effect of better fuel economy...this will be helpful when running 40+ lbs injectors.

a taller rear gear will not be as much aid to you with a supercharger as it would be with a turbo. remember that an s/c is directly bolted up to a the motor...I don't know how the PD setup will work with a 2.93, I do know that centrifical setup will hate a 2.93 since it needs the revs to build boost.

-Ron

[Matthew]

Originally Posted by themadhatter

a good guess says that AA's twin screw is from Stimpee's research and hard work.

I'm gonna be running the 3.15 till I either blow it up or get bored of it, either way, it's nearly brand new with only 26k on it. :D

I will be running a max of 12-14 PSI, I figure the 2.93 gearing will come in handy for power delivery and will have the added side effect of better fuel economy...this will be helpful when running 40+ lbs injectors.

a taller rear gear will not be as much aid to you with a supercharger as it would be with a turbo. remember that an s/c is directly bolted up to a the motor...I don't know how the PD setup will work with a 2.93, I do know that centrifical setup will hate a 2.93 since it needs the revs to build boost.

-Ron

Well, pretty much yeah, but Simpee was not cut out of it (like how Jim and Josh screwed him...) http://www.aatuning.com/whatsnew/main.php

As for the 3.15, it should last for a loooooong time even at those power levels. If I decide to run the stage II twinscrew (2.3litre blower) I am going to retain the 3.46 gearing. I will only gear it higher if I decide to go turbo...

[themadhatter]

3.46 will be great but you'll be slamming into your rev limiter quicker then with a higher gear. you may find it to be too aggressive when you go FI. a 3.38 or even the very common 3.23 may be your best choice. this will be something that only trial and error can show but I do believe that your currenty setup is going to limit how much fun you can have and possibly make 1st gear unusable.

similiar to how I ran a 3.91 with my car for a bit...1st gear was a joke and I redlined 5th at a 127mph. let's say I was redlining about twice a day when I had that setup.

[Urinemachine]

Hatter, im in b-town too, i've seen your car. Didn't realize it was turbo now. I need a ride! Supercharger is supposed to go on my car this saturday if everything goes as planned. How much would it cost to get my 3.23 25% rebuilt to 40%?

[themadhatter]

Originally Posted by Urinemachine

Hatter, im in b-town too, i've seen your car. Didn't realize it was turbo now. I need a ride! Supercharger is supposed to go on my car this saturday if everything goes as planned. How much would it cost to get my 3.23 25% rebuilt to 40%?

not turboed just yet, I'll be in-country on Wednesday. The car goes to the body shop before I install the Technique Tuning kit. I have everything sitting in boxes ready to rock.

oh and jet hot rocks, I had them coat all the hot and some cold parts of my kit: www.rsiwerks.com/project332is/tt/jethot

where in bethlehem are you? I don't know if I've ever seen you around but if you see me, please do get my attention.

a rebuild from Diffsonline would need a quote from Dan, my best guess is probably not accurate but I'm gonna say that a 40% 2 clutch build is gonna run you around $900.

-Ron