S15 HLSD is AWESOME!!!

[koukicody]

thanks Chris. thats the seller i was trying to link to.

[x240xdrifter]

thats sick greg, congrats!

[naed240sx]

OK - Take a stock OPEN S13 diff. Remove the ring gear bolts and ring gear. Attach the ring gear on the HLSD and put it in the pumpkin. Don't buy bolts.

Special bolts are JUST for those N/A guys who want to run 4.36 or 4.63 ratio ring gear.

Not true. You probably just didn't notice the gap around the bolts because it is pretty small. Regardless, to do it right with a 4.08 ring gear you should use 0.5mm wall sleeves on 4.08 bolts, or order the special nismo bolts.

the 4.36 pumpkins come with proper sized bolts.

This thing LOCKS and GRABS, even accelerating hard out of a turn.

Also note that Helical/torsen differentials NEVER lock.

[e1_griego]

Or search 's15 lsd.'

Alex

[Dattebayo]

Whats the word on those things wearing out? I mean, how far can they go before its not worth it to buy or sell it? VLSD's have "viscous couplings" that can go bad, although I'm not sure what it is that makes a Helical type work...

I see deals all the time for just the center piece, and it kinda seems a bit too good to be true...

[e1_griego]

Mostly the helicals won't break. If they do, I guess the gears inside let go, but I'd imagine you'd need a lot of power to do that, or something improperly installed etc.

As for just the center piece, I'll disclose right here, right now, that I'm using stock s13 output shafts with my s15 helical. Both sets dropped right in, but the s15 output shafts I got were a bit beat up (the clearly were removed with a crow bar or something).

I know this contradicts everything I read about the s15 helical install, but I saw it with my own eyes (and I still don't believe it haha).

Here's the output shafts next to each other (dirty ones are stock, cleaner are s15)

Installed:

I have some more pics that I can post later tonight.

Alex

edit: I have the s15 output shafts for sale if someone wants them. Email offers to [email protected]

[Dattebayo]

Well DAMN if that didn't answer every fricken question I had. Good work!

[e1_griego]

Just please don't take my word as gospel. Like I said, I know what I saw (and I know that I'm running the output shafts) but I don't want someone to get hosed by going solely off my information.

Alex

[Steve Lloyd]

http://cgi.ebay.com/ebaymotors...wItem

I have no money right know, but maybe somebody could use one........

[thenillaz]

http://cgi.ebay.com/ebaymotors...wItem

theres a direct link to the one i got mine from

hes got a bunch laying around, he just lists them one at a time

Sweet. $500 bucks aint bad, sounds good.

[Driftless240]

How much more noisy is it verses the stock, if any? For what I get from switching I could care less if it is, just curious.

[nismofly]

no extra noise

[Driftless240]

Awesome. Yea, I looked on ebay, 300-400 is a great price for what you get, IMO. I am going to go gain some more info... NICO SEARCH FTW.

[94_240sx]

Okay. I did search again and it looks like Greg didn't notice the gap or care much about it. There will be a slight play like naed said if you install s13 stock ring gear on s15 hlsd. Some people just torque the bolts down to 112lb and be done with it, some people get Nismo bolts or some people fabricate like putting thin aluminum sheet to fill the gap. Anyway, I got confused, but I'm good now.

[Driftless240]

griego is right, if you run a 4.08 (stock ring gear), you have no need for different bolts.

Keep in mind, I removed my 4.36 diff + pumpkin completely, as well as my J30 axles, and replaced them with the HLSD (into a stock S13 open diff pumpkin) and returned to stock S13 axles.

I also kept my larger-capacity, finned diff cover that came with my R32 diff, and filled with Royal Purple.

So Greg, you have a HLSD Installed in a stock S13 Open Diff. Pumpkin with a R32 Finned Diff. Cover while useing Stock Ring Gear/Axel Bolts... Is this Correct? I am just looking at seeing what I need to do when I replace my Welded Diff. Let me know if there was anything incorrect or something else that I missed. Thanks.

[AZhitman]

Correct.

And as for "gap", I noticed none, and we were looking for it. In fact, the bolts seemed to barely want to go through, but I suppose I see what Dean's getting at.

Methinks the "sleeve" issue is a non-issue, and a call to a local driveline assembly tech just confirmed it - not that one person's experiences are "confirmation", but here's the reasoning:

Regardless, even if there were a .5 mm "gap", the ring gear is basically a press-on fitment (much like a hubcentric wheel), so some play around the bolt holes is irrelevant. The ring gear will be perfectly centered.

Bolts were all cleaned, chased with a die, and installed with Loctite, in sequence, to the FSM specs. Make sure you do this, it's an extra measure of insurance.

[Driftless240]

Correct.

And as for "gap", I noticed none, and we were looking for it. In fact, the bolts seemed to barely want to go through, but I suppose I see what Dean's getting at.

Methinks the "sleeve" issue is a non-issue, and a call to a local driveline assembly tech just confirmed it - not that one person's experiences are "confirmation", but here's the reasoning:

Regardless, even if there were a .5 mm "gap", the ring gear is basically a press-on fitment (much like a hubcentric wheel), so some play around the bolt holes is irrelevant. The ring gear will be perfectly centered.

Bolts were all cleaned, chased with a die, and installed with Loctite, in sequence, to the FSM specs. Make sure you do this, it's an extra measure of insurance.

Thanks! Ahh specifics are confusing!!! But are a must!!! Now the question is... Meshies with tax returns or HLSD.... or BOTH with a little saving. Prob be best to replace the welded diff though, previous owner had it done and I do not know who actually did it... Its unsafe I tell you unsafe!! (Shh... its my excuse)

[eds13]

I must get a HLSD! I'm getting ready to swap my RB in and I know that the welded diff from the previous owner is gonna crap out soon.

no it wont! that thing has more weld in it than....idk it has a lot of weld in it!!

[boznuttz]

Ordered mine!! This is going to be FUN!

[Threed240]

Any problems with backlash? Or, did you have to use any special shims? Im tired of dogleggin it...

[e1_griego]

As long as you put the shims back in the way they came out you should be fine.

I don't hear any funny noises (clunks or humming) at all from my diff.

Alex

[94_240sx]

Finally got the bolts today. Very happy...

[S3t0_S13]

*puts on flame suit*wait, so i can get a S15 hsld gears and drop it into the stock S13 open diff?

[94_240sx]

*puts on flame suit*wait, so i can get a S15 hsld gears and drop it into the stock S13 open diff?

s15 ring gear uses 13mm and s13 uses 12mm bolts. The bolt I got is 12mm with 13mm shank as you can see in the pic. There'll be a slight play if you use s13 bolts, but people just torque the bolts down, fabricate sleeves or get Nismo bolts like I did. AZHitman and other people have had no problem with original s13 bolts, so you can call it "Drop in".

[S3t0_S13]

comp im on at work shows no pics, so ill check it out later,ive found just the diff for sale for dirt cheap, seller thought that its REQUIRED to have the half shafts, so i can get it for relativly cheap, great

only thing is im just wondering how much of a difference it will make with the speedo and i gotta find me a shop 2 do the gear swap

[thenillaz]

s15 ring gear uses 13mm and s13 uses 12mm bolts. The bolt I got is 12mm with 13mm shank as you can see in the pic. There'll be a slight play if you use s13 bolts, but people just torque the bolts down, fabricate sleeves or get Nismo bolts like I did. AZHitman and other people have had no problem with original s13 bolts, so you can call it "Drop in".

To elaborate on this, you're also going to want s15 output shafts to link up to the rear axle shafts. Thats pretty much everything...

[thenillaz]

comp im on at work shows no pics, so ill check it out later,ive found just the diff for sale for dirt cheap, seller thought that its REQUIRED to have the half shafts, so i can get it for relativly cheap, great

only thing is im just wondering how much of a difference it will make with the speedo and i gotta find me a shop 2 do the gear swap

Yeah you post too quick for me, you are gunna need the half shafts to be safe, rumor has it some people did without. What do you mean speedo? Speedometer, ball huggers? I don't understand how the speedometer comes into play with a differential. You should do it yourself, unless you honestly don't think you're capable...

[e1_griego]

I've got s15 output shafts for sale if anyone's lookin'

I highly recommend this diff for the non-dorifto crowd, though at our last local drift event a local guy with an s15 was out drifting with his helical.



Alex

[thenillaz]

I've got s15 output shafts for sale if anyone's lookin'

I highly recommend this diff for the non-dorifto crowd, though at our last local drift event a local guy with an s15 was out drifting with his helical.

Alex

lol, I never understood why drifters would rather go with a clutch type. Seems like a helical would work just a well...

[S3t0_S13]

I don't understand how the speedometer comes into play with a differential. \

the different gear ratios effect your speed and speedometer dont they?

You should do it yourself, unless you honestly don't think you're capable...\

i meant dropping in the gears from the s15 diff into my S13 diff, nah ive heard some horror stories and wouldnt trust myself with it!

lol, I never understood why drifters would rather go with a clutch type. Seems like a helical would work just a well...

every other thread ive read has looked down upon the helical as a drifting lsdi have to get any seat time at the track, so i dont know, i mean it cant be worse then a open diff now can it? but then again ive never seen any 240's runnin hlsd's at D1GP or Formula D and such, i dnno dude i wanna give it a try