Diffs again...

[Matt_S]

And could somebody tell me the part number for an nismo 2-way diff for an rs13 ca18det with an open diff and abs? these come with the outputs right?

Dont know if Nismo sell an LSD for an open diff car... Kaaz do though and they then list the part number of the output shafts that you need (off aVLSD car basically)

 

[Tom]

Didnt Bara find that there are 2 types of S14 output shaft when they were developing James' uprated viscous diff? Dont know what the differences are though.

Was it not the actual viscous unit that was different between the diffs? I know when i got mine from Bara he mentioned something about having the unit for a later one on the shelf but not one for mine.

 

[kivi]

Dont know if Nismo sell an LSD for an open diff car... Kaaz do though and they then list the part number of the output shafts that you need (off aVLSD car basically)

Nismo lsd´s come with the outputs.
so basicly I should buy the one meant for the vlsd diff?
the casing is same between open and vlsd? only the outputs are different?

 

[Matt_S]

Nismo lsd´s come with the outputs.
so basicly I should buy the one meant for the vlsd diff?
the casing is same between open and vlsd? only the outputs are different?

Externally (on UK cars at least) the open diff looks the same as the Viscous diff, so yeah I guess you can buy the Nismo kit for the viscous diff car and it will all bolt up...

 

[SteveC200]

Was it not the actual viscous unit that was different between the diffs? I know when i got mine from Bara he mentioned something about having the unit for a later one on the shelf but not one for mine.

Yes, because the output shafts are different IIRC.

 

[james]

Yes, because the output shafts are different IIRC.

yup, there are 2 different splines and shafts for the viscous unit and output shafts used in S14(a) VLSD's, they changed them about half way through production for some unknown reason.....
I'm surprised Bara didn't have both types in stock Tom, I made sure I gave him both when we started this little project... hmm ah well

 

[Ratdat]

Just out of interest, can anyone who's seen the S13 or S14 VLSD shafts tell me...does one driveshaft have a double spline? I know the R160 VLSD's fitted to Subaru's have this arrangement, as do the FWD VLSD's Nissan used, so I have up to now assumed the R200 does as well. By double spline, I mean on one side the driveshaft has a normal spline with a snap ring fitting but on the other shaft it has a matching spline (and snap ring) but has an extension with additional smaller spline that sits deeper inside the diff, inside the VLSD. Hope that makes sense

If this is the case, then I assume when fitting a plate type or ATB diff the double splined shaft whould need to have the extension bit chopped off or the whole thing replaced?

If the S13/S14 VLSD doesn't have this arrangement then can anyone post a picture of what the shafts look like?

-Eddie

 

[james]

That does make sense, but the answer's no, they aren't double splined.
The spline's the same all the way up the shafts and one of the shafts is longer than the other. Don't have any pics handy though, sorry

 

[Mitch]

I think you're wrong, mate, as I've seen quite a few output shafts recently unfortunately, and IIRC, there are some with the double splines. I've got a couple of diffs to put together tomorrow and if I remember, I'll take some pics.

Matt-Yeah, I had just put a hose between the two pipes before, but I put the JDM diff on because I wanted the quicker accelerating/lower top end ratio, and to see if the 2 way fitted in the casing so I could recoup the money I'd spent on it by selling the other two diffs.

 

[Ratdat]

That does make sense, but the answer's no, they aren't double splined.
The spline's the same all the way up the shafts and one of the shafts is longer than the other. Don't have any pics handy though, sorry

Thanks James, I'm just trying to figure out if I could use an aftermarket S13/S14 plate LSD in my 510. My car uses UJ's on the rear rather than CV's. At the moment I'm running an R200 from an S12 with shafts from a 260Z which snap right in. They have splines like you describe so I guess it's possible they'd work with a S13 VLSD then providing the spline length is right (I'd have to build it into my casing though). Then again if that'll work then a Kaaz diff might be viable.

Trouble is it's damned difficult to find out what'll work for sure and I don't want to fork out £600+ for a diff that won't fit

 

[james]

ooooo err, Mitch has got me worried now.....
It's been a while since I've seen them. Hang on for the pictures before taking my word for it......

 

[kivi]

does anyone know the part number for 2-way nismo gt pro lsd for an s13?

 

[Mitch]

Yep, got pics of the S14 and S13 JDM ones. They both have 2 sets of splines with a gap (on the longer shaft). Now I'm really confused because the S13 one is a smaller diameter, as I tried to fit it in the s14 diff to check the splines. It just span in the diff.

 

[james]

Yep, got pics of the S14 and S13 JDM ones. They both have 2 sets of splines with a gap (on the longer shaft). Now I'm really confused because the S13 one is a smaller diameter, as I tried to fit it in the s14 diff to check the splines. It just span in the diff.

there are definitely 2 different spline sizes, even for S14(a) If you put the small size into the bigger diff there's enough difference for it to just spin

 

[Mitch]

The sizes were about 31mm and 30mm. Don't know if I'll bother looking for another pair, as the hassle involved in fitting them only to find they are the wrong ones is just not worth it. It seems to work okay with the cut down shafts I have, so that'll do for now. If it goes tits up, I'll look again.

 

[Ratdat]

So, basically in order to fit the aftermarket LSD you'd need to cut off the secondary spline on the VLSD shaft, yes? Oh, and the shafts...do they need to be the bigger spline of can you get LSD's to suit either?

This is sounding good There may be hope of me having and LSD after all!

 

[Mitch]

As long as the shafts fit the internals, so far I've found all the 3 200SX diffs and R32 GTST one will accept the LSD

And on mine, the splines fitted (From an open diff) but the shaft was too long, so I just cut it down. We'll see if it fails early, but it seems okay so far.....