Aftermarket LSD question

[Chris32]

G'day chaps,

quick question - my diff is whining and getting a little clunky, looking to replace it. I can get a good stock diff for $250, or thinking of going to a mechanical LSD

Thought about getting a GTR diff, but too hard for me as it invloves swapping alot of parts. Does anyone know anywhere that has one available for R32 GTSt?

Also how do you tell between a aftermarket mech. LSD and a stocker? A few wreckers I have spoken too don't know how to tell the differance, and i am thinking if I can go and have a look, I may be able to pick up a bargain

Regards, Chris

[Bl4cK32]

Best way i can tell you about it is to look here : www.cusco.co.jp/english/e_lsd.html

I think from memory Mist (another user on this forum) had a Nismo Pro lsd 2 way kit (brand new in box, with gaskets and oil) I think the kit allowed adjustment for the 2 way as well....i was going to grab it, but lack of funds (have to get turbo & new manifold)

He was letting it go for $1850? i think....damn great buy if you ask me for a new kit already here in Aussie.

Steve did explain before...i think its the shape of cross shaft???...might have to do a search myself

[Bl4cK32]

Steves explanation

"In the diff centre, there is a key that will be different shapes. It works by pushing plates apart, that causes the clutches to engage. The 1 way will be like a triangle, 1.5 way will be like 2 triangles, but one side will be truncated, and a 2 way will be like two triangles with their bases together (like a square on its side)"

Sorry Steve if i butchered your quote

[Chris32]

So I will need to take the back plate off to be sure?

Anyone have any pics of what I should be looking for?

Chris

[Chris32]

is this what it would look like if it was a mech. LSD?

[Bl4cK32]

cant say for sure dude..if i had it in front of me to examine it i could tell you...ive never played with the skyline diffs myself....Anyone else??

[Chris32]

I pulled that of the UAS site, its a modded 33 diff, but if someone could tell if it looked stock or aftermarket it would be a huge help

Hows the diff in your car? is it noisy?

[Bl4cK32]

Nah, just chooses to kick me out sideways when it wants to

[Chris32]

yeah mine is dying slowly, open wheels a bit no and then, crunchy in reverse and clunky in forward gears, so looking for a upgrade

Anyone know if a 33 GTS25T diff would bolt in?

[Steve]

the 33 diff is different ratio, 4.11 vs 4.3x in the 32. Not sure if they would bolt in, but the 33 diff also fits S14 if that is any indication. If its mechanical, you can remove the centre and fit it anyways.

The diff in the photo looks pretty stock to me, have a look on the cusco site for diagrams of how mechanical diffs work.

If the diff is still in its housing, try turning both ends. A viscous diff, you will be able to turn each side of the output ends in opposite direction, a mechanical diff - not a hope in hell. Its easier if its still on the car, then you just jack up one side and try to turn the wheel. If the wheel turns (once again, with some resistance) it is not mechanical, if its almost impossible to turn, but when it does it clunks (slips a little then holds again), most likely a mechanical diff.

Best way though is to pull the back cover off and have a look for the 'keyway' sort of thing as per the cusco site. Definately do this if you think you may have found a mechanical diff.

hope that helps

[Chris32]

cheers mate, will have a look at a few and see if I can spot one that is not a stockie

So say the diff is on the ground, by itself, and I twist each side (where the axles bolt up) in the oposite direction, the stock lsd will allow this quite easily, while a mech. lsd will not allow you to do this?

[Steve]

I wouldnt say quite easily - it will be tight (or should be) but it will be smooth, no grabbing and then giving, then grabbing again - that is if you could turn the mech diff by hand:)

[Chris32]

ok cool, I will give it a try, anything that feels tight and grabby, I will put to one side for further inspection

Chris

[Clint32]

yeah the viscus std diff will be tight but you will depending on how worn it is be able to twist eash side independenly and smooth, a mechanical will be rough and tight.

33 diff wont fit in 32 but all centres are interchangable.

S13 diffs bolt in and if you find one with a 6 bolt(3 pairs) flange for the driveshafts then you can use s13 shafts which are the smae lange and trade yours in

[R31Nismoid]

you could get your stock one and shim it up.

it'll work much the same.

Thats what im getting done to my tired (stock) LSD.

It'll come up close to what a mech would be like, but much cheaper

[Roy]

you could get your stock one and shim it up.

it'll work much the same.

Thats what im getting done to my tired (stock) LSD.

It'll come up close to what a mech would be like, but much cheaper

SOLD...only tell me the name of the place where you are getting it done so i can drop my car over to the free spinning piece of crap re-shimmed

[GTRgeoff]

That one in the pic looks like a viscous out of a 33, which I understand are unrepairable from my enquiries. I'm just hoping mine is helical so I can get away with getting it shimmed. Post price if anyone gets it done.

[Chris32]

you could get your stock one and shim it up.

it'll work much the same.

Thats what im getting done to my tired (stock) LSD.

It'll come up close to what a mech would be like, but much cheaper

I have heard many people mention this, but have never heard of anyone getting it done. If you do, please let all of us know!!!!!!!1

Cheers for all of the replys

Chris

[Chris32]

S13 diffs bolt in and if you find one with a 6 bolt(3 pairs) flange for the driveshafts then you can use s13 shafts which are the smae lange and trade yours in

Clint, how sure are you that a S13 diff will bolt in? They are much easier to come across than a aftermarket diff for a R32! So if I find a S13 mech. diff, I'd just need the drive shafts form a S13, and then it would all bolt in?

Cheers, Chris

[R31Nismoid]

SOLD...only tell me the name of the place where you are getting it done so i can drop my car over to the free spinning piece of crap re-shimmed

Im getting mine done while my car is in for a rebuild.

Ben @ Racepace is doing mine, i've got another 2nd hand LSD and he is just gonna use what he can to shim it right up.

Im sure there are many other places that can do the came thing surely