gxlbiscuit

well i have a 88 T2. i think i need another LSD but i dont have alot of money.. and its stupid to buy a used t2 diff its probably just as old and beat. What would drifting jesus do? no seriously any solutions.. i heard rebuilding them is no good. i just got an s2000 and its showing up my rx7 beyond belief. so now im attacking steering and suspension even further. to try and play catch up the understeer on my seven is horrible.

RETed

Are you street racing???
If so, you don't deserves an answer...

If we're talking track, get a used FD one.
It's relatively cheaper, and I like it better due to its linear lock-up characteristics.


-Ted

gxlbiscuit

yeah?? that bring me to another question. is there like a set standard for LSD sizing? like 8 inch fit all 8 inch cars..and so forth ? like if my s2000 has a 8 inch is it possible that i could get one from an s2k.. or does honda/ mazda try and keep the lsd designs specific?

owen is fat

where the hell did you hear that rebuilding an S4 TII LSD is no good?

HAHAHHAHA!!!!

rebuilding it with new clutchplates and choosing specific shims allows you to have a like-new LSD and you get to adjust it to your preferred lockup characteristics with the shims and lash setting.

sheeesh.

but you can sell it to an FD guy and use the FD torsen in your FC... thats the easy way out.

there is no other car that uses anything swappable with an FC TII LSD except the FD, and in most instances the FC TII S4 LSD is seen as superior and more durable.

gxlbiscuit

thank you

Agent_D

iTrader: (2)

i think RETed would disagree owen, last i read Ted says FC LSD's are only good for about 50-70k (depending on driving), thats not very "durable" in my book.

idsigloo

S4 NA LSD are clutch type and that is correct that they don't last very long. The T2 and GTUs LSDs on the other hand are Viscous type and will hold together alot better. I would go with a FD one because it is Torsen and you'll get much better response out of it. The torsen I believe is also the same type that your s2000 is using as well as Miata LSDs.

Agent_D

iTrader: (2)

yes ted, he's talking track since he didnt feel to answer your question, i know him personally and he may be slightly dumb (haha ) but he doesnt street race

*runs so biscuit does not break my leg*

slpin

iTrader: (9)

the s4 t2 rear is clutch
dont make stuff up if you arent sure.

rotary downshift

imo .. weather he is street rac ing or not is not up to any of the forum members to decide or pas judgment all he did was ask a simple question and if thoes who respond are not willing to privide him with technical info rather than their own opinion they dont deserve the post ... simple as that what one man does with his fc is his buisness unless it directly affects you one has no right to pass judgement .. and i dont care if u have 20k posts or 2 posts ... unless u dont have facts or experiance on the subject .. dont freaking knock a guy for what he does .. like holy hell childish and selfritchous ...

DEZERTE

Sweet, you can use an FD LSD, news to me

idsigloo

First I've heard.

FarNorthMotoring

iTrader: (2)

S2000 has what Mazda people like call the 7 inch ring and pinion setup. Its basically a Miata/FB RX-7 ring and pinion, with a larger spline axle. The S2000 LSD will bolt into a non turbo housing, but your going to have to have custom axles made for it.

If you not making a lot of power sub 350 or so, FD Torsen LSD would be my pick. I love how a Torsen feels, though if you are making some power the S4 Turbo II would be my choice on the cheap. I would rebuild it though, around 200 dollars in parts to rebuild one. I recommend to any who has the their S4 n/a or turbo II diff out, rebuild it... it will make all the difference in the world.

FarNorthMotoring

iTrader: (2)

He is right, all S4 LSD are clutch types, the S5 gots got the viscus types, which are in my opinion only slight step about a open diff.

gxlbiscuit

nice

SexInDaRex

get a torsen off ebay. I did and it feels great!!!

Roen

iTrader: (2)

hmm......ever consider getting the ATS Carbon LSD?

NaD00D00

Can someone give more info as to how the FD LSD swaps in and all that? I'm highly interested in doing it (after reading this thread), and I think my '88 FC LSD is going bad.

cpubugs

Yeah me too! More info... I am pulling the NA rear out of my FC tomorrow and well I guess my noob question would be this. Can I just buy a FD torsen rear and replace mine? I am doing a full na to turbo convert. Or are we just talking guts here?

Bounter

I'm doing a FD LSD swap in my S4 T2.
What I have heard the T2 and the NA diff isn't the same size in the US so you can only use the FD diff in the T2.
If you got an NA you can instead get a Miata Torsen diff.
Correct me if i'm wrong.

Here's some pictures of my FD diff in my S4 housing (Can maybe take some time to load the pictures).





And here is a picture of the S4 open diff and the FD LSD (The Euro T2 didn't have an LSD from factory, stupid Mazda).

NaD00D00

That looks awesome man! Was the install pretty straightfoward? I have a T2, so it's supposedly swapable. Did you have to put in different fluid or anything?

Bounter

Yes, the swap is pretty straighforward.

What I did was, I removed the old diff and unscrew the big gear wheel (the one that's around the diff, don't know what to call it) and mounted it on the FD diff.
Then I mounted the FD diff into the S4 housing and adjusted the backlash using the FSM, you can find them here: http://www.rx7city.com

torean

if u want to rebuild a clutch type lsd autornd.com has them for sale for 310.20.....as far as i know it seems to be a package for the turbo diff....