Nismo Selective Lsd Diff

[tridentt150v]

When I got my R33, it came with a heap of std bits and peices [which I sold off].

One of the boxes was for a Nismo Selective LSD Part No. 38420-RS200 [i kept the box].

1. What I want to know, is this a 1.5 or 2 way diff centre? [What I read on the www was some Nismo units could be either depending on how you set them up].

2. Is it a mechanical diff?

3. How tough is it?

All I know is that it hasn't broken yet, it loads up both wheels every time [corners and acceleration], it clunks and skips in corners, and when you have it on the hoist and spin the back wheels, they both rotate in the same direction.

If anyone can info me up or give me a link I'd appreciate it. I basically want to know what I have.

[Bumblebee]

clukns and skips?? change the oil in it for starters.. it has the wrong grade

[tridentt150v]

Nope, redline, it has always done it, oil is fine, clunking and skipping or chatter is normal for a locker.

[chook]

Could only find 2 references to this part # 38420-RS200 and also 38420-RS201 (in japanese) , mentions it is a selective model, no mention of 1.5 or 2, looks like they were available in both.

Also have a read of this

http://classiczcars.com/forums/showthread.php?t=8305

http://www.poweraxel.com/nismo/news/news2000/n000040.html

Looks like it is an old short lived model, perhaps a Nissan dealer could look up the part # or someone with an old Nismo catalogue.

Edited October 14, 2007 by chook

[tridentt150v]

Yeah, what I found was that you could do something to it and make it a 1.5 or a 2. From what I understand, you could do this any time you wanted [as long as you have a hoist and spare couple of hours]. But it didn't say what it was you did, maybe reversed a plate or something - not that important anyway, cos I'm happy with it as it is, so I'll leave it.

Thanks for the links. I'll go have a read now.

[Cubes]

The nismo diff you have is basically just an uprated factory GTR type LSD. It should be fairly smooth operating; light throttle it won't lock/clunk and skip. I.e roundabouts car parks etc. They are THE best street LSD in my opinion as they are so smooth and streetable.

You can buy the upgrade clutch packs from Nismo and slap them in the GTR diff. I believe Nengun also sell these.

They are super smooth on light/cruise throttle; give it just that little bit more throttle and it will lock nicely and send a little shudder/skip feel through the car. So really easy to drive around police.

If it clunks/chatter at light throttle change the oil and or push an lsd additive in to it as they are not supposed too.

I remember a while back redline wasn't that crash hot in CLSD's as they clunked. I think I read that here and on a Ford forum. Great for gearbox's not that crash hot for diffs.

The Castrol full synth oil SAF-XA is good and already has the LSD friction modifier in it.

I believe the Redline doesn't have the friction modifier in it and requires redlines additive for the operation to be smooth.

So possibly just add some of redlines friction modifier. Or head down to ford and see if they still stock the ford additive.

Just don't add too much; slowly increase the dose.

[tridentt150v]

Thanks Cubes, I'll get it hot and change the oil, probably due anyway. I guess Bumblebee was right as well.

But, it did it from when I brought it, so the oil in it from japan was no good either? And it doesn't chatter too much, but you can feel it.

As I said, I'm happy with it, it locks up and drives great when needed. It also helps in a strange way when you power on through corners etc, makes the car feel very predictable.