QUIZ! What is this?
 

Hello guys since my car started to make a klanking noise while accelerating at low speed with steering input I decided to change my axle thinking it was my problem. A spindle and an axle later, I realise it makes the same klanking noise so my problem is obviously my LSD. I've read a lot on forum, I think in my situation the best option is to swap the NA8 Torsen 'package' on my NA6 but anyway, I would like to know more about my current LSD since I *think* it's not stock (can't find a matching housing with miata.net/differential spotters guide). Here's a picture, I'll be removing my differential today so I can put an open one while I wait. Thanks!

For 100 Kudos: http://img690.imageshack.us/img690/7...01670pp.th.jpg

If not an mx5 diff I would vote that it's an rx7 unit.

LSD plz take a look
 

Since I've haven got any consistent reply I thought asking you guys. thanks!!!1!
https://www.miataturbo.net/general-miata-chat-9/quiz-what-49199/

my stubs do not match the ones in the spotters guide I've read it 8 times. my diff stubs looks like it doesn't have the ears (the one supposed to be symetrical on the open diff and assymetrical on the vlsd). Mine is square with a stud on each corner as you can see in the photo. Does that matter ?

my 2-piece 1.8 axles are square with a stud in each corner too.

In for positive identification. That looks a lot like my questionable diff right down to the square 2 piece axles.

that almost looks like a 1.6 open diff but i cant be sure without being there in person persepective/size thing.

looks like a 1.6L diff

chill out.
you posted it yesterday and people told you its a 1.6 diff.

if you want to know if its a vlsd go around a tight corner with your foot to the mat. if it spins one tire, you have an open diff or a vlsd thats worn out and will be the same as an open diff anyways.

1.6 open.

Impatient little bugger aren't you.

UPDATE: I just finished removing my differential. Here are some pictures. I just don't get it: the front part attached to the driveshaft and the stubs don't look like the ones shown in the spotters guide. I have perfectly square diff stubs with no ears and the nose of the diff doesn't look exactly the same.

http://img820.imageshack.us/img820/9679/dsc01678.th.jpg
http://img13.imageshack.us/img13/6291/dsc01680tt.th.jpg
http://img268.imageshack.us/img268/7...c01672y.th.jpg
http://img808.imageshack.us/img808/5558/dsc01681.th.jpg

Time to panic.

Time to panic.

please explain.

:nuts:

No pinion damper so it's a 1.6 diff for sure. It's making sounds already so let's hope it doesn't grenade on you doing 90 on the freeway. That sure would suck now wouldn't it :giggle:

As you guys can see on the pictures I removed the diff today.

If it's the casing of an open diff, what's in it ?

I'll update with more photos tomorrow.

Hey fail bot read what we siad it is a 1.6 diff that means it is rather weak and not worth repairing even if it is fuxared. If you want to get the car back on the raod then buy another 1.6 or preferably a better beefier 1.8 diff. Otherwise i dont care what you do agressive driving will turn the diff into metal soup.

Nice help douchefag you're not answering my question, what could possibly be in my open diff casing ? Is it some kind of aftermarket clutch type unit, does it come from a rx-7, who sells them etc etc.

I know for sure 1.6 diff are weak no matter what but before swapping the torsen kit I'd like to know all of my options.

Why do you believe that your miata is special in some way that it does not have a 1.6 diff that came on all the other miata's from that era? Did you put a different dif in it? Did the previous owner tell you he did some sort of awesome diff replacement?

First off, the car is imported from Japan and has a lot of goodies. I would believe the car had a track purpose since it's been turbocharged, suspension has been stiffened and it has a lot of goodies (lightweight weds sport tc-05, hks oil cooler, brake cylinder brake etc..). I removed the differential today and I could clearly tell it had been already done on the car. As people say my casing looks more like an open diff, I wonder what LSD unit is in it since I know for sure it is not open.

I wonder if this is an automatic 1.8 diff, square flanges and no rubber dampener.
And maybe the PO put an LSD in it...

edit: how do you know for sure that its not opened?

I'll try to open it up tomorrow we'll see...

I know for sure it doesn't have an open differential. Otherwise, the tail of the car wouldn't be that happy.

http://www.youtube.com/watch?v=ezjxhU8C71s

It would be more prone to oversteer with an open diff...

More oversteer with open diff ? WTF is going on here

Definitely open diff.

UPDATE: I just finished opening the housing, here is what I found. Does anybody recognize this ?

http://img651.imageshack.us/img651/5...c01685h.th.jpg
http://img231.imageshack.us/img231/3...01692ao.th.jpg
http://img28.imageshack.us/img28/6527/dsc01686aq.th.jpg
http://yfrog.com/judsc01687jzj

Open 1.6 differential. Compare:
http://cgi.ebay.ca/Mazda-Miata-OPEN-...item439dc47946

http://thmb.inkfrog.com/thumbn/btdtr...11_004.JPG=600

Actually, turn yours over and take a picture for me.

Sort of looks like this one:
http://j-trade.cranky.jp/IMG_P3461.JPG
http://cgi.ebay.ca/JDM-Miata-T2-Tors...item20b1e82eff

Maybe the housing comes from an open diff but the LSD unit does not.

This is a torsen in the foreground.
http://www.flyinmiata.com/projects/O.../OTC_diffs.jpg

I still think its an auto 1.8 diff

are they supposed to fit in 1.6 casing?

I think its the casing as well.
The auto 1.8 diff had no rubber dampener, and the axle flanges were square, with no ears.
Unfortunately, they were all opened diffs from the factory, but on the positive side, at least it wont break as easily as the 1.6 diff.

Full Tilt I think there is a bit of misunderstanding let me clarify...
All the pictures I've posted are from MY differential which I think happens to be somehow broken (that's why I took it out).
Another thing people don't seem to understand is that my car is very tail-happy (you don't have to fight with the car to induce oversteer, the diff seems to lock easily) IMO that eliminate the possibility my diff would be open and as you can see on the pictures it cannot be VLSD since there is no friction plates. I am no expert but this is what I assumed having read everything I could find on the web.

Still need to know.... what is this LSD
http://img231.imageshack.us/img231/3...01692ao.th.jpg

When an LSD locks, it causes understeer. An open diff will allow the car to oversteer much more easily.
I drove a 01 miata with an open diff and my own 99 miata with an LSD on the same day on the same autocross circuit, and the 01 was much more prone to oversteer, while my car was prove to understeer. I was also a bit faster in my car even though he had better tires, which can be attributed to the LSD.

Im assuming that you think that an LSD causes oversteer because of drifter influence, but thats just a misconception spread by drifter fan boys. The reason drifters use LSDs is because they are inducing oversteer through power, not by normal means of suspension tuning.

Errr... I'm no expert, but I don't see the logic behind that.

Whatever who's right ..(rider384 i agree).. what is this LSD unit ?

Yah, I have no idea what Im talking about. Im just making this shit up as a joke.

He's right. When you turn in, in order for the car to rotate you need the rear wheels to rotate at different rates - hence the need for a differential. Look at racing karts - the only way to get one to turn is to twist the chassis and lift the inside tire up. 2-way LSDs lock up the rear wheels on deceleration as well as acceleration, inhibiting turn-in and causing understeer. This is why most good racing LSDs (OS Giken, etc.) are 1.5 way, providing full lock on acceleration and a little bit of stability on deceleration, but not enough to make the car understeer.

Open diffs will not inherently cause oversteer, but a good LSD will make the car much more stable under hard braking and trailbraking while still allowing for smooth, easy rotation.

OP, even if that is a clutch diff (Mazdacomp makes one that's very common in the SM world), it doesn't really matter because what breaks in the 1.6 diffs is the ring and/or pinion. You can't transplant your diff into a 1.8 housing, either. Even if that is a $2000 LSD made of solid gold, your best bet is to sell it and buy a 1.8 Torsen (or a 1.8 open diff and install an OS Giken).

I would say thats a 1.6 just like everyone else is saying. I had my 1.6 diff open and it looks exactly like that. I dont really understand why you are so eager to disagree with everyone and Im a bit surprised you haven been beaten with the ban stick yet.

Either way, toss it and get a 1.8 diff.

Everyone saying this is a 1.6 diff is WRONG. The miata expert himself seems to be confused. Here:

''My computer says your pictures are virus infected, so I have to be satisfied with looking at the thumbnails. I assume the stub shaft splined ends are identical? That and the small round hole say Torsen 2. Therefore the differential is not a 1.6 liter of any kind. New theory for the square stub shaft flanges is then that they are RX7 parts.''

the whole thread on http://forum.miata.net/vb/showthread.php?t=384364

If you're still hung up over whether this is a 1.6 or 1.8 style unit, just measure the diameter of the ring gear.

And count the number of teeth on the ring gear, and the number of teeth on the pinion gear.

Do what Joe says.

:bowrofl::bowrofl::bowrofl::bowrofl::bowrofl:

keep on failing man we only try to be constructive for so long.

Dude, with the magical diff out - turn the Drive shaft input by hand and please tell us which way the halfshaft flanges turn? Do they turn in opposite directions or the same? This will tell you whether it's open or not. As wether it's a 1.6 or 1.8 diff - do as Joe says, measure the ring gear.

And on the concept of LSD oversteer vs. understeer... try driving a car with a welded/locked diff out of a corner. Both rear wheels having the same power to the pavement will tend to push you in a straight line (your understeer) vs. breaking loose - unless you have mad power (like me - sort of). I've got an OS Giken in mine and the corners are so much faster now, esp the tight ones, with less oversteer than when I had the open 1.6 in (at the same speeds). Crazy faster. But I still get oversteer as I'm going that much faster now, and the 225hp is enough to kick out the rear coming out of the tight corners.

Really??? Mine too!! OMG!

Someone stopped bumping their thread 3 times a day. Im going to assume that he found out that it was an opened differential and was embarrassed for acting like a douche, so now he has left the forum in shame, hopefully never to return.

So long noble drifter, May the zip-ties be with you, always and forever.

hey douchefag, found out my lsd is mazdaspeed clutch type lsd 2way. You were kinda way outta line with you open diff and your douchetastic attitude. F you very much. Late

You Fail.

The flanges on the stub shafts don’t look like any 1.6l diff I have seen and I have looked at a multitude of them including GTX diffs, Viscous diffs, and Mazda comp 1.6 clutch units. I am pretty sure that is not a standard 1.6l diff.

I actually think it might be an RX7 clutch type about 85 or 86 I think. I had one of those but I sold it some time ago but I sold it and I can’t remember exactly what it looked like. pretty sure it looked sort of like an Open diff but not quite there were some clutch packs nestled in what sort of looked like an open diff.

Bob

Interesting how much Fail there is in this thread and pretty much no Fail from the Noob with only 30 posts.

Like I said I think it is an RX7 clutch type. 1.8l size ring and pinion probably a 3.909, same gears Im running in my car but I sapped them on a torsen.

Kei, Did You count the teeth yet

Bob

Edit, I looked closer at the shape of the shft and splines on the stub shaft. they look 1.6l. This unit is different than anything I have seen before.

Hey douchebag, how about you suck my dick.
You are so lucky that anybody put up with youre fucking attitude at all.

Yah, because opens diffs dont allow you to oversteer at all right?

Even if it does have an LSD, which he still could be full of shit about, his logic behind assuming that it did is totally flawed, and his little ricer drift video makes it even worse.

lulz.

How about a big nice cup of shut the fuck up.

je ne comprende pas francais.

:jerkit: