View Full Version : PA S15 Helical
I have for sale my s15 helical rear end, I got the s15 center section import from Japan, the seller assure me it had less than 60k kilometers. It was professional installed in a stock s14 r200 case with the stock 4.08 ring and had the backlash adjusted by Greensburg Driveline, I also replaced the axle stub shaft seals. No corners were cut when doing the installation, I even bought new from Nissan the s15 ring bolts that have the larger unthreaded collar instead of cheating out and trying to use the s14 stock ring bolts, doing this can cause the ring to shift during operation and cause catastrophic failure. I used it for 5k miles and it ran flawlessly, the great thing about the helical is it locks every time. I opened it up when I took it out to swap covers and inspect the diff, the ring looks great, nice even contact, nothing unusual looking. SOLD
https://scontent-ord1-1.xx.fbcdn.net/hphotos-xfp1/v/t1.0-0/s480x480/12369211_10153880645321812_5174100027895399035_n.j pg?oh=e369f6b686571ac22d9b04655b76e8fa&oe=571E4095
https://scontent-ord1-1.xx.fbcdn.net/hphotos-xfl1/v/t1.0-9/12376516_10153880645291812_3415687808040736057_n.j pg?oh=997cce2b48b9cfb896c9b8d69b351e75&oe=56EB1DE9
Climb385
12-12-2015, 05:55 PM
Bump for a great dude and for quality parts!!! Can vouch for his stuff will be exactly as described
2x6, will bolt right up to stock s chassis axles
dorkidori_s13
01-05-2016, 07:17 PM
best OE LSD PERIOD!!!
Also, to fix what the OP said... this diff DOES NOT lock! It only transfers torque based upon the amount of grip on each wheel. Helical/Torsen diffs are NOT capable of full lock (unlike clutch types). However, I have had ZERO issues with sliding my ass end around in the 2 odd years Ive owned mine. Unlike OE Viscous diffs, these DO NOT wear out under heat. You just need to change the oil in them every 30-40k miles. Helical/Torsen diffs are completely silent and awesome for drag racing and road course racing due to their torque transfer capabilities... they also make daily driving amazingly easy as in low grip situations like snow and rain, helical/torsen LSD reverts back to an open diff as the way they transfer power is based on a multiplying gear. Any number x 0 is always zero, which means open diff time.
That's why I bought it, I wanted something that could hold power, locked every time, and had quiet operation and locking characteristics. I hear the kaaz can be loud and clunky during locking and everyday operation.
dorkidori_s13
01-05-2016, 07:34 PM
That's why I bought it, I wanted something that could hold power, locked every time, and had quiet operation and locking characteristics. I hear the kaaz can be loud and clunky during locking and everyday operation.
youre using the term "lock" incorrectly. torsen/helicals diffs dont lock, they distribute torque between wheels depending on multiplication factors of torque. its never a 100% lockup between the wheels... i think the highest it ever goes is 80/20. clutch types "lock" both wheels together.
TheRealSy90
01-06-2016, 02:32 AM
Do you still have the S15 3.6 ring and pinion for it? And using the s15 ring bolts doesn't make sense when you installed the s14 4.08 ring on it, the s15 3.6 ring is what has the larger holes requiring those specific bolts.
Not sure what you mean? The shank goes through the diff outer lip and screws into the back of the ring gear.
The thread pitch and size is the same for both s15 and s14 ring gears, the difference is the actual diameter of the holes on the diff, the s14 bolts will physically work but without the necked up shank you have space for the ring to move maybe a quarter of an inch, if you're putting down any sort of power or you are being hard on the diff and that ring moves that little bit you're gonna destroy your ring, pinion, diff, and potentially crash.
Po_31
01-14-2016, 08:46 PM
Are you super firm on the price
dorkidori_s13
01-14-2016, 10:23 PM
Are you super firm on the price
his asking price is cheap for a full S15 diff + output shafts + ring gear + pinion + proper pumpkin install... remember, unlike viscous LSDs, these never wear out!
S15 diff + output shafts usually goes for around $400-$450 by themselves, labor for install by a reputable shop will usually run you around $300-$350.
Rb26kouki
01-14-2016, 10:28 PM
If you were local I'd buy it
Thank you, I have a decent bit more than the asking price into in, hell I got almost a hundred bucks in bolts alone securing the ring to the differential.
his asking price is cheap for a full S15 diff + output shafts + ring gear + pinion + proper pumpkin install... remember, unlike viscous LSDs, these never wear out!
S15 diff + output shafts usually goes for around $400-$450 by themselves, labor for install by a reputable shop will usually run you around $300-$350.
s14Art
01-15-2016, 10:30 AM
So worth it. I love my HLSD. Actually have an extra one at home, but scared to sell it in case I ever need another one ;)
So worth it. I love my HLSD. Actually have an extra one at home, but scared to sell it in case I ever need another one ;)
Right? That's why I'm not extremely motivated to sell this one, if I grenade my current diff I like to know I have a good one I can throw in and get the car back on the road immediately.
e1_griego
01-15-2016, 11:16 AM
I have yet to see an s15 helical break. Ring and pinions can break but I think you'd be hardpressed to break the guts.
I've seen a miata torsen break, but it's because it was a wheel hopping mess.
SexOnWax
01-27-2016, 06:25 AM
Free bump for you sir. Always wanted one of these and if I wasn't planning to sell my 97 Kouki, I'd be all over this deal!
Someone buy this before I change my mind!
Thanks man, in actually suprised it hasn't sold yet, it's a steal compared to a Kaaz price point wise. People has requested quotes for shipping then I never hear back, not sure what they thought it was going to cost to ship an 80 lb differential but I think 60-100 bucks is reasonable. Oh well
TheRealSy90
01-27-2016, 07:39 AM
Do these still fit the same stub shafts as an s13 open diff? I know s13 vlsd stub shafts are different.
Sorry I was backwards about the ring gear bolts and now I understand.
I wish you had the s15 diff case cause I need a diff mounted speed sensor :(
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Do these still fit the same stub shafts as an s13 open diff? I know s13 vlsd stub shafts are different.
Sorry I was backwards about the ring gear bolts and now I understand.
I wish you had the s15 diff case cause I need a diff mounted speed sensor :(
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No worries, that I'm not sure, I can tell you that the s14 open diff axles bolt right up to the s15 stub shafts (same 2x6 bolt pattern), if you can use that information to find out.
e1_griego
01-27-2016, 08:32 AM
s15 diffs use their own output shafts that are 30 spline (s13/s14 are 29 spline).
s15 diffs use their own output shafts that are 30 spline (s13/s14 are 29 spline).
Agreed, but externally they are in the identical location and pattern to bolt up to a stock open diff s14 axle. Not sure if s13 axles differ.
e1_griego
01-27-2016, 08:41 AM
Correct. Bolts right up.
For anyone interested the s15 stub shafts are included in the sale, you CANNOT use your s14 or s13 stub shafts, the helical differential has a different number of splines internally and if I remeber correctly are a slightly different length (someone might be able to confirm, it has been a year since I've stood the stub shafts next to each other)
OutToWinPAHC
01-27-2016, 09:12 AM
ever come to the philadelphia area?
I do, my fiancé is originally from there. We have a tasting for our wedding at the venue out there, we have to do it before April if I recall.
OutToWinPAHC
01-27-2016, 09:22 AM
Well thats promising shipping would be a bitch but I live in Philly and have used these is many of my builds. Would love it for my R33
Shipping isn't too bad, about 62 bucks to Philly through FedEx. I've been pretty suprised with shipping costs recently, I shipped 45 lbs worth of coilovers to Philly for 29 bucks the other day.
OutToWinPAHC
01-27-2016, 09:42 AM
non abs case?
Correct, non abs case and the q45 rear cover, works the same as the stock s14 cover, just has the abs bungs
OutToWinPAHC
01-27-2016, 09:51 AM
I have a bunch of fancy powder coated covers. But ill pm you I think I want this.
Funny you say that, my buddies own a Powdercoating company, some of the colors they spray, God damn.
TheRealSy90
01-27-2016, 05:40 PM
I was wondering about the stub shafts because I was going to buy Villains stub shafts that have the 350z axle flange. But they use normal s13 6 bolt cores. So I'd have to send them s15 helical stubs specifically.
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Bump, I'll be going to Philly in a month or so, if anyone wants to meet on the way or drive down from the east coast somewhere we can arrange something.
shephurd
02-08-2016, 10:31 AM
ill be in Pittsburgh later this month, will the flanges and differential work with an s13?
Flanges are 2x6, works with my stock s14 axles. Not sure about s13s, another guy was pming me about it and I think he found out that it will bolt right up (obviously you will have to swap rear covers to use your 4 bolt cover versus my 2 bolt)
shephurd
02-08-2016, 12:13 PM
its not abs casing is it?
2jzs15
02-12-2016, 03:10 AM
Still forsale?
Still available, tons of interest but nobody laid down any money yet.
CaliforniaMayhem
02-13-2016, 01:25 AM
Wow this is a deal people! He did all the hard work and that price is insanely good imo.
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Po_31
02-13-2016, 02:43 AM
So tempting
Wow this is a deal people! He did all the hard work and that price is insanely good imo.
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Thanks man, sadly I think that's going unrecognized. This isn't some welded diff or worn out vlsd, I took the time to find an importer with a low mileage unit, bought the correct hardware to install it, had it professional install to know that the preload and backlash are done correctly, hell I even replaced the axle stub shaft seals because they were slightly seepy. So often I see these cars hacked and hot rodded together, that's not how I do things, whomever gets this is getting a hell of a deal and a part done right.
Crazyced
02-17-2016, 08:36 AM
Would this bolt right up to an S13 240sx w/ VLSD and w/out ABS (not sure if that matters)?
That does matter, abs r200's are longer since the abs sensor is on the pinion flange side, this would bolt right up to a non abs s13, you would just need your 4 bolt rear cover since this has the 2 bolt s14/q45 rear cover
Edixon
02-18-2016, 02:51 PM
Pmd. Very interested with PayPal ready.
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LoSt180
02-19-2016, 07:07 AM
Sold sold sold sold
It's about time! I was eyeballing this thread debating if I wanted to deal with swapping the helical part into my S14 abs/vlsd/3.69 diff housing.
RalliartRsX
02-19-2016, 08:17 AM
I would recommend against the 3.69 unless you have tons of power and a huge flat torque range.
I'm doing the swap now..it's actually pretty easy
LoSt180
02-19-2016, 09:56 AM
I would recommend against the 3.69 unless you have tons of power and a huge flat torque range.
I'm doing the swap now..it's actually pretty easy
3.69 is stock for JDM S14/S15 w/ SR20DET, so not sure what your recommendation is actually based on. It came with my front clip and 3rd gear is awesome (top is around 90 mph at redline). Honestly felt like I was shifting too often/too soon on my old S13 SR w/ 4.08 gears.
Thanks though.
These cars are so light don't fear the gear, hell I wish I could get down into the 3.30 range, currently have 3.69 and I leave in second in any situation besides a steep hill, I'm gonna move down to a 3.54 with a 28" tall tire soon. This is my turbo lsx car
RalliartRsX
02-19-2016, 01:03 PM
3.69 is stock for JDM S14/S15 w/ SR20DET, so not sure what your recommendation is actually based on. It came with my front clip and 3rd gear is awesome (top is around 90 mph at redline). Honestly felt like I was shifting too often/too soon on my old S13 SR w/ 4.08 gears.
Thanks though.
What you are failing to mention is the s15 was a 6 speed, which affects gearing. Not sure how you go about directly relating the two as the gearing is NOT similar across the board......
A 3.69 on a 5 speed with only 300whp or so SR20 is molasses up a hill slow
PS the 3.69 is only stock on the s15 6 speed. Please correct your statement. The auto s15 also had a different rear end final drive ratio. The s14 5 spd with Sr is still a 4.08.rear end
LoSt180
02-19-2016, 01:36 PM
What you are failing to mention is the s15 was a 6 speed, which affects gearing. Not sure how you go about directly relating the two as the gearing is NOT similar across the board......
A 3.69 on a 5 speed with only 300whp or so SR20 is molasses up a hill slow
PS the 3.69 is only stock on the s15 6 speed. Please correct your statement. The auto s15 also had a different rear end final drive ratio. The s14 5 spd with Sr is still a 4.08.rear end
Please go read an FSM and correct your assumptions. Maybe even drive one, you might be local enough to work something out.
S14:
MT - 3.692 FD
AT - 3.916 FD
S15:
MT - 3.692 FD
AT - 3.916 FD
USDM models and S13 SRs came with 4.08 FD on both MT and AT.
FSM Screen grab is attached to this post.
Sorry to OP for turn post into a FD debate, just didn't want some newb to take baseless recommendations without further research and consideration when this thread inevitably turns up in a web search.
dwnshft2drft
02-19-2016, 07:05 PM
Interesting... How about USDM Z33 transmission with S15 MT differential any pros and cons? Lets say on a S15 SR20DET.
Does the S15 AT Diff is helical too?
LoSt180
02-19-2016, 07:39 PM
Interesting... How about USDM Z33 transmission with S15 MT differential any pros and cons? Lets say on a S15 SR20DET.
Does the S15 AT Diff is helical too?
S15 AT diff is VLSD, only the MT is helical.
Pros and cons of Z33 trans probably needs a new thread. ;)
No worries, doesn't bother me, I'd prefer accurate information be posted instead of assumptions
RalliartRsX
02-22-2016, 06:19 AM
Please go read an FSM and correct your assumptions. Maybe even drive one, you might be local enough to work something out.
S14:
MT - 3.692 FD
AT - 3.916 FD
S15:
MT - 3.692 FD
AT - 3.916 FD
USDM models and S13 SRs came with 4.08 FD on both MT and AT.
FSM Screen grab is attached to this post.
Sorry to OP for turn post into a FD debate, just didn't want some newb to take baseless recommendations without further research and consideration when this thread inevitably turns up in a web search.
Thanks for that. I always assumed (yes, assumptions are terrible, I know.....) the JDM and USDM S14 shared the same FD.
I still personally wouldn't touch a 3.69 with a 5 speed, but I am sure our end purpose doesn't align.
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