S15 HLSD is AWESOME!!!

[TchouikoS13]

So i take it yours is the cheaper alternative? as i read somewhere in this thread.

And just to make sure, greg, you are using stock output shafts right (with the s15 lsd)?

[AZhitman]

I am using S15 helical AND S15 output shafts, with OEM S13 axles.

[e1_griego]

Um, no.

The auction I won was for an s15 helical. I got this one instead. It's apparently very very rare.

And NO, you can't use stock s13/s14 output shafts with the s15. s15s have 30 spline output shafts, s13/s14 have 29 spline.

Alex

edit: the cheaper alternative is an OBX. My diff is factory nissan.

[importer]

Part number is #38102-RS500. Talked to several people at Courtesy Nissan and they had no idea about this bolt. Part number didn't show in their system.

If you had called Nissan Motor Sports (AKA 'NISMO'),You probably would have got them.......I get parts from them all the time, that Courtesy can't figure out.

But I hardly ever have people buy bolts from me, because the stock ones work just fine.

The Nismo bolts still have the small thread.And the weakest point of any bolt is the thread....So the Nismo bolt has no greater shear strength than the stock bolt.

The bolts don't hold the gear centered, the ID of the gear where it slips on the diff does.So there is nothing to be gained there......

[TchouikoS13]

so in that case, you mentioned you have s15 output shafts for sale. How much?

[importer]

the cheaper alternative is an OBX.

The OBX is not much of an alternative.........The Honda guys fown here can't get the damn things to stay in one piece.Hate to see what a 400HP SR would do to a chinese chunk of mystery metal.......

[94_240sx]

so in that case, you mentioned you have s15 output shafts for sale. How much?

Eikon needs a pair too.

[e1_griego]

so in that case, you mentioned you have s15 output shafts for sale. How much?

Dont' have them any more, and they were 29 spline anyway, not 30 spline.

Alex

[87nissanKC]

Okay, I just finished the diff. It's not on my car yet, but I put them all back together and filled it with 75w-90 Mobil 1 fluid. I'll just leave it overnight to see if there's any leak and install it sometime tomorrow. Everything went smooth with no problems. I have a couple of questions.

1. I followed FSM and used about 1.5 quarts. I wonder why Greg said more than 2 quarts. BTW, filler plug is on the left side of diff over on s13 unlike below picture.

2. I turned the input shaft by hand and worked fine, but when I turn output shaft by hand, I can hear more noise than before. I tried several times and it looks like noise is coming from inside. Is this normal? I'm 100% positive that I installed ring gear, shims, brearing races, outshaft, side seals and everything correct. I hope it's noisy beacuse of different gears inside. My open diff was fairly quiet when I did the same thing to it.

I'm getting the same thing...Is anybody else getting this? I'm only worried because I had a shop install it and i want to be sure they didn't screw up!

[matt147]

We bought an S15 diff for our S13 as well. Has anyone bothered to have a shop check the lash after swapping it into the pumpkin?

[naed240sx]

I checked gear mesh on my s15 diff after installing it with the gear mesh indicator dye. Gear mesh was 100%. Perfect tooth pattern.

I've since put 20k miles on the car and the diff still works like new.

[Spectre_240sx]

Sorry about the thread necromancy, but this seems to be the most informative thread on the S15 LSD, so I thought it made sense to post here.

I'm just looking at the debate about whether the special bolts are needed or not, and here's what I'm thinking. The ring gear may be "hubcentric" and not be able to move laterally, but there are torsional forces at work as well, and having bolts that don't totally fit could conceivably give you some slop in the drivetrain, however minimal. I know it's not a big deal, but it was mentioned that there is nothing to gain whatsoever from the special bolts and I don't think that's 100% accurate.

Personally, I'll be looking for the bolts as I just bought an S15 diff from Ebay. I paid about $600.00 shipped, but it looks like I got one that's brand new.

Also, I'm looking for a replacement stock ring gear and pinion. I've got a lot of slop in the drivetrain and it feels like it's in the diff. (Could be transmission, too. That'll be replaced soon.) Any reccomendations on where to pick these parts up would be appreciated.

[Asmar]

Very nice.

[ILoveMyRHS13]

I might buy one of these for my street car... When I get one.

[importer]

The ring gear may be "hubcentric" and not be able to move laterally, but there are torsional forces at work as well, and having bolts that don't totally fit could conceivably give you some slop in the drivetrain, however minimal.

Yes, it's hub-centric, all ring gears are.No, the 12mm stock bolts will not cause more driveline slop.They are tight, and do not allow the ring gear to move.(if they are not, then the ring gear was installed wrong.....)

If you are really concerned with it (I have never had a problem with them)the other option is to have someone machine out some 12mm ID by 13mm OD spacers,or just buy some of the expensive Nismo bolts.But it really isn't required.

If you think you have excessive drive line slop, check your U-joints, and halfshaft CV joints.They go bad way before a gear set does.

If you absolutely want the bolts, and can;t find them, let me know.I have a nice used set.

[Eikon]

I still need a set of S15 output shafts if anyone has some?

[supradealz]

hows it compare to a 2 way clutch type diff?

[Didderson]

Finally NICO is realizing the usefulness of the torsen LSD.

I've had mine for a year now. Loved it ever since.I'm glad u posted this because ppl give it a lot of **** lol. Lol @ noobs who think it sucks.

+1 for grip driving

I bought mine from that Herical guy lol. He ships u free JDM candy as well! lol. Just get output shafts from the nissan japan parts stores off ebay. they'll be expensive but you really won't find em elsewhere unless you are patient.

[a_ahmed]

Oh man I want a herical LSD too lol (s13 here)

[Soravia]

I have a Helical on my SE-R V Spec, any way to fit it in my S13?? LoL

[naed240sx]

I have a Helical on my SE-R V Spec, any way to fit it in my S13?? LoL

NO

[Soravia]

Damn! L@L.

I think I'll be getting a Helical myself. 1-way clutch are out of my range.

[slepys14]

I installed an s15 helical in mine, it is very loose though. did you shim yours, do you know what sizes they were?

[jr_ss]

I personally think that the S15 Helical is the best all around diff for our cars...

[Edinburg Speedstar]

thats pretty cool... I was thinkin bout gettin a KAAZ 1.5 or a 2 way lsd... but heard good stuff from vlsd from s15...

[aceof07]

hey guys i'm still not 100% clear on what EXACTLY is needed for the hlsd to fit a s13. i was wondering if this would do the trick, http://cgi.ebay.com/ebaymotors...24296 i asked him what shape it was in and his reply was that i might need to replace the carrier bearings, do you guys think its worth it? sorry for being a noob but i just have so many questions.

[AZhitman]

It's all there brotha - Re-read Page 1.

[aceof07]

alright to sum everything up, S15 helical NEED the output shafts to work on a stock open diff. pumpkin, there is this whole issue on size of bolts but it doesnt seem to be a big problem, and also that some cedric/gloria HLSD fit into the stock open diff, no prob. the only mod needed for the most part is to swap out the ring gears. but now i have a few questions, where would i get new carrier bearings for the S15 hlsd? and also how would i go about trying to use the 3.69 ring gear from the S15?

[RCA]

alright to sum everything up, S15 helical NEED the output shafts to work on a stock open diff. pumpkin, there is this whole issue on size of bolts but it doesnt seem to be a big problem, and also that some cedric/gloria HLSD fit into the stock open diff, no prob. the only mod needed for the most part is to swap out the ring gears.

but now i have a few questions, where would i get new carrier bearings for the S15 hlsd?

When I bought my S15 HLSD it came with all the S15 shims, carrier bearings and output shafts.Make sure to ask the seller for all those pieces.

and also how would i go about trying to use the 3.69 ring gear from the S15?

you can go on Ebay, search "S15 Silvia Helical" then click on one of the HLSD and ask the seller if he can get his hands on one.

Other then that

[naed240sx]

Trust me, you don't want to use the 3.69 ring gear. I don't care how much power your car makes, you don't want it unless you are using the s15 transmission as well.

You would probably need the whole s15 pumpkin because I'm not sure the s15 pinion is compatible with the other r200 diffs.