The lsd thread

NashMan

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well right now i wana find new lsd for my car stokc most likly will not cut it for what i want


so from my mad internet skills and year of knowlage

2 way trd\kazzz
1.5 way most leaning to so far trd\kazz\cusco



i cna get kazz unit but i have herd there hoisey and clunky at low speed can any one conferm this

the others i have no clue



HELP A BORTHER OUT
 

Sl1dewaysSupra

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I don't know about the Kazz in a Supra but my friend has one in his Miata and loves it. I am not sure if it is a 1.5 or 2 way.
 

bowsercake

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KAAZ makes great LSDs. They are pricey though. They are noisy because they are aggressive. They can flip the clutch plates over to allow more slipping but then they are only slightly more aggressive than stock and what is the point of that?

Are you going to be road racing or drifting on this LSD? If so, pics!
 

ViR2

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i have had a kaaz on my evo, and no problems with low speed... Also, kaaz's are nearly the only one's to make LSD's for our cars ;)
 

NashMan

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well i have found prices on all 3 kazz is the fastest to get here and can be built to 2 way to 1.5 way so kinda leaning towords it but i really want more imput about it
 

Wiisass

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ATS also makes LSD's for the supra. I just don't know who is the best shop to go through to get them. They're going by carbonetic in the states now for some reason and they don't show the listing for the supra on their website, but the JP website shows it. They have a couple different diff's available. They have the regular metal LSD which is probably the same as the Kaaz. And they have the deftforce which has more clutch plates and a harder lockup, it's meant more for drifting than anything else. They have 2 different models for the deftforce and I can't remember what the differences are. I think one is just more serious than the other. They also have the Carbon 1.5 way, which is what I would like to get once we have some money. It's a lot smoother than a metal lsd but will still lock up nicely.
 

Bondango

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Cusco do 2 LSD's for the MA70, the MZ and the RS. Both come as 1, 1.5 or 2 way.
The MZ uses cone plates so its reponse is quicker, but agressive, its best suited to track use. The RS uses torque springs so the initial torque is absorbed making it a bit more gentler.
Dunno if they are available stateside though
 

BorHor

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My friend has a kazz 2 way on his 240sx and it clunks at low speeds.
 

SupraOfDoom

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Bondango said:
Cusco do 2 LSD's for the MA70, the MZ and the RS. Both come as 1, 1.5 or 2 way.
The MZ uses cone plates so its reponse is quicker, but agressive, its best suited to track use. The RS uses torque springs so the initial torque is absorbed making it a bit more gentler.
Dunno if they are available stateside though

I think I've seen them on 935's site.
 

NashMan

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fuck it i am buying one wonte be able to push my car for some time since i need my hand to heal


was going to make agrisive stocker but it will just last as long frist sex party the next day you are done
 

Poodles

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carbonetic looks promising, but they only make a MKIV diff right now...
 

supraguru05

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2 way is only good for drifting a 1.5 way is what you want for track/autocross
 

NashMan

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dose not matter you can ajuast the lsd very simpley to be 2 way or 1.5 way

so i can go 2way for when i go to difft event's and chuck it back on the hoist and clock it back to 1.5
 

Wiisass

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Nash, so which thing on that page did you get? And I was under the impression that the truck stuff didn't work for us or was I looking at something different.

Poodles, Carbonetics is the same company as ATS. And if you look at the ATS Japan site, you will see that they have a lot of different diffs available. But I don't know if Carbonetics can get them for you or if you would have to find someone who could order from ATS Japan, but the do offer all their diffs for the mk3.
 

NashMan

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Solid Spacers

Solid pinion spacers replace the factory crush sleeve. These spacers reduce the need to retighten pinion nuts and reduce R&P failure due to excess backlash.

this should work for our diffs i need to find out for sure befor i order thou

all post pic's tonight

Wiisass said:
Nash, so which thing on that page did you get? And I was under the impression that the truck stuff didn't work for us or was I looking at something different.

Poodles, Carbonetics is the same company as ATS. And if you look at the ATS Japan site, you will see that they have a lot of different diffs available. But I don't know if Carbonetics can get them for you or if you would have to find someone who could order from ATS Japan, but the do offer all their diffs for the mk3.
 

NashMan

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pics i wish i had my stocker out all all ready to compare but oh well
 
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Poodles

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there are plenty of companies that make torsens for other cars...

pisses me off that nobody has made a GOOD aftermarket one for us...
 

Big Rob

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Poodles said:
there are plenty of companies that make torsens for other cars...

pisses me off that nobody has made a GOOD aftermarket one for us...
Detroit do make a TruTrack that is a g-series diff but the offset's are all wrong for an IRS setup compared to the live rear end it was designed for. Pain in the ass!
 

NashMan

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grague 5 one of our suppler's suppost to be the last one in the state's so order time will be like 3 eeks or more has to come from japan


BorHor said:
LOOKS DOPE! If you don't mind how much and where did you get it.
 

NashMan

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well me my self is not a fan of speed multplers there great for auto x and very tighy cornering but for over all raceing 2 ways are used most



Poodles said:
there are plenty of companies that make torsens for other cars...

pisses me off that nobody has made a GOOD aftermarket one for us...
 

BorHor

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Tell us how it works out after you get it in and use it. I am really interested in getting one.
 

NashMan

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will do the plan is to install it after my hand is in good working order throw on the stock 92 wheels and see what she does muhahahah
 

Poodles

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I like cornering... but I don't think a factory torsen would put up with the 7M torque for long...

People need to be stabbed in the face for not making parts for us... There is obviously a need for a stronger torsen...
 

NashMan

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the really only torson rear diff makers out there aka speed multpler diffs is quaife

they only make dog box tranny for the ae86 and some gt4's
 

IJ.

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My Detroit TruTrac is a primative clunky noisy PoS compared to a T1 Torsen but it's still far nicer to drive with than a clutch style LSD ;)
 

Poodles

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the trutrac is meant to handle almost as much as their lockers... so I cna understand it being...primitive.
 

tekdeus

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It seems that most OEM JDM Mk3 torsen diffs that fail have the main housing shear off from the ring gear part, due to fatigue over time (this happened to mine, it failed while cruising around). In another thread we were discussing how if that weak joint could be strengthened, perhaps with a bead of weld, it might be enough to prevent the fatigue and failure. The solution seemed plausible as we had a side-by-side photo of the Mk3 and Mk4 torsens, and the Mk4 housing was beefed up at the point where the Mk3 one was failing.

This diff was dreamy to drive on, especially auto-X. Anyone want to guinea pig this idea?? It would be the cheapest solution...
 
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drjonez

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IJ. said:
Pity Detroit don't do a TruTrac that fits the G series.....
(not a fan of conventional LSD's)
that's the truth!

i'm still considering have quaife build one for us....

Big Rob said:
Detroit do make a TruTrack that is a g-series diff but the offset's are all wrong for an IRS setup compared to the live rear end it was designed for. Pain in the ass!
yups. the truck 8" truetrac doesn't work in our pumpkin.

Poodles said:
I like cornering... but I don't think a factory torsen would put up with the 7M torque for long...
it won't. see my sites....

tekdeus said:
It seems that most OEM JDM Mk3 torsen diffs that fail have the main housing shear off from the ring gear part, due to fatigue over time (this happened to mine, it failed while cruising around). In another thread we were discussing how if that weak joint could be strengthened, perhaps with a bead of weld, it might be enough to prevent the fatigue and failure. The solution seemed plausible as we had a side-by-side photo of the Mk3 and Mk4 torsens, and the Mk4 housing was beefed up at the point where the Mk3 one was failing.

This diff was dreamy to drive on, especially auto-X. Anyone want to guinea pig this idea?? It would be the cheapest solution...
the MKIV torsen is a T2, not a T1.....in other words, completely different design and metallurgy.

i agree, the T1 was FANTASTIC to drive on....i miss it. :(
 

Poodles

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there are plenty of american companies that make them as well... I may look into them...

Sadly everyone wants a clutch style for drifting these days...
 

annoyingrob

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Hmm, I have a friend who might be interested in beefing up the JZA70 torsen diff. I'll have to go talk to him next week about it. I know he has an extra one lying around, and the welding skills, and a JZA80 diff to compare it to.


And yeah, the MKIII torsen is an awesome diff, when it's not broken in half. I love mine.
 

IJ.

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You could possibly press fit a steel drum girdle over the Torsen depending on clearence that would prevent the case expanding and splitting under power.

It fails where the case is thinnest at the helical gear cutouts to allow the Ring gear to be fitted, in effect it's a "cut along dotted lines" deal.
 

tekdeus

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Here's the photos of the Mk3 and Mk4 Torsens side by side, taken from this long thread: http://www.supraforums.com/forum/showthread.php?t=392174
Check it out, as well as the photos below. It seems that the case fatigues, with cracks beginning at the corners of the gear windows, possibly because of outward forces caused by the internal gearing under load.
*** Anyone know of any good racing shops or metal workers that we could get more opions from about how to reinforce these areas?


And here are photos of the broken Mk3 diffs:
Fatigue points:






This was my diff, you can barely see how the unit sheared off from the ring gear! It did this during casual driving, so I assume it's a metal fatigue issue. There may be a small amount off room in there for reinforcement of some kind.
 
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