OptionZero

I have an S14 w/ no abs and no VLSD.

I have an S15 diff and the output shafts.

If I swap the guts into an S13 open pumpkin, will it fit? Or do I have to use my stock s14 open diff pumpkin?

510det

Yes the S15 HLSD will fit in a S13 open diff. housing. When I swapped my S15 hlsd into S13 open diff in a S13 chasis I found it a fairly straight forward swap. When you remove the open diff. make sure to keep the bolts, bearing caps and shims in the same order/location they were in originaly for reassmbly. I removed my ring gear and noticed that the hole in the S15 HLSD for the ring gear bolt was 1mm larger. To play it safe I took the HLSD and a S13 bolt to a machine shop and had them machine a sleeve to go over the bolt to make up the 1mm differance. I know this might be over kill but better safe than sorry. Once the sleves were made I got some locktight for the ring gear bolts and installed it into the S13 diff making sure that the shims, bearing caps and bolts were reinstalled in the same location as before. I checked the lash and had no need to make adjustments. I put a new Nismo high capacity finned cover on and filled it with Mobile 1. For referance I used the Nissan FSM for torque specs and The SportCompact Car articale when they installed the Quafe unit in the Silvia for a visual. I have driven the car daily for a year now and no problem/noise to report. I love the way the car handles and feels. I chose to remove the entire housing from the car when doing the swap. reinstalling the housing and getting it bolted in place may be the most difficult part of the swap.


89 S13 240sx with blacktop Sr20det
with Blitz FMIC Stock boost and turbo

OptionZero

yeah, I'm gonna have a shop do it, they did my friends in one hour. His car was a hatch, i just wanted to make sure the pumpkin (s13) bolts perfectly to my s14.

ultraDorksGarage

can someone mic the od of the ring gear bolts for me please?

i have my diff coming in this week, but no spare s13 ring gear bolts to make my spacers>< im under the impression its an m12 bolt which is like 12.3mm or something, any insight as to exact bolt dimension would help me alot^^

OptionZero

shit, new question:

Does the longer output shaft go on the left or the right?

ultraDorksGarage

can someone confirm long shaft on the right?

OptionZero

according to sykikchimp, its the same as the open diff, so just look at the insides of one...(i don't know myself).

vegita319

just curious man, why didn't you just bolt the s15 guts into your s14 pumpkin?

ultraDorksGarage

prolly cause his s13 diff is already outside of the car^^

OptionZero

my friend has an extra an open diff s13 sitting in the garage; this way the car doesn't have to be on stands except to swap pumpkins, which...should only be a coupla hours max since we've done that part before

WILDACEX187

wat about if u have the s15 diff in the s15 pumpkin? will that bolt up directly to a s13?

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OptionZero

NO. From what i got searching, s15 diff requires s15 driveshaft and tranny. You want the s15 helical, you have to run it in an s13 or s14 open diff housing like any aftermarket diff

510det

I have an extra spacer for the bolts at home I,ll check them tonight. But if my memory is correct the S13 bolt is 13mm and the S15 is 14mm

Ritz S14

Took this two nights ago.


You see how the ring gear is not perfectly centered?
The shaft on the left side(driverside) is longer than the right side(passenger side). It's longer so the gears will reach the center of the differential.

When looking at the pic.. the left side is the driver side..the right side is the passenger side.


CLiff notes.The long shaft goes in the longer part of the diff.

WILDACEX187

so u absolutly need that spacer for the diff to work?

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Ritz S14

Spacer as in shim? hell yeah you do.

WILDACEX187

no im talking about wat this guy said.

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ultraDorksGarage

if anyone else is looking to lathe some sleeves, i just made my ring gear bolt sleeves, ID was bored out with a 15/64" bit, OD turn down to .520-.518", length was .40". seems to have worked out nice, material was brass.

looks like im all set to do the change this weekend, we will see if i remember how to set timken preload this weekend, lol....

WILDACEX187

what sleeves do u speak off?

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Ritz S14

S15 diff holes to mount the ring gear are larger. He had the sleeves made to make sure the bolt doesn't come out or anything.

WILDACEX187

im getting a complete diff. if i use everything from the s15 will it bolt up to the s13 diff without needing any of that stuff?

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ultraDorksGarage

can u clarify some things,
correct me if im wrong... thats an open diff in the pic... dont open diffs have equal length shafts? or are they like the s15 shafts where one is ever so slightly longer than the other?


and just to clarify cause u r confusing me..

umm...what gears? u mean splined shafts right?, (which btw are called flanges by Nissan)

ring gear being centered in the pumpkin doesnt correlate to long or short shaft eh? the ring gear is offset just like every other ring and pinion settup, and the offset of the ring gear flange on the diff. has no correlation to the center of the diff.


secondly , uh...., but isnt the diff upside down in that pic?, right side in pic is LHD drivers side and left is pass. eh?

anyhow, i was under the impression that vlsd's had long side on the right, but after thinking about this hlsd, apparently the left side needs the longer oil grooved surface.

please clarify just for my information, would like some good info before i start my first r200 tear down

ultraDorksGarage

not to make sure bolt will come out.. thats what proper torque specs and loctite is for.

the ring gear gets radially torqued. in theory the 10 12mm bolts will hold the ring gear from shifting radially on diff(spinning the 1mm that there is extra hole) but i made sleeves to make sure that any sudden jolt wouldnt have any chance of shiffting ring gear radially. just like 510 said.. better safe than sorry.

when u put a small bolt in a large hole and apply radial/or a force perpendicular to bolt length, the bigger tolerance between hole and bolt increases ur chances for shearing the bolt.

edit: someone answered the other question

Ritz S14

"[QUOTE=ultraDorksGarage]can u clarify some things,
correct me if im wrong... thats an open diff in the pic... dont open diffs have equal length shafts? or are they like the s15 shafts where one is ever so slightly longer than the other?"

Yes, it is an open diff. The LEFT(looking at the pic) side is longer.


"and just to clarify cause u r confusing me..

umm...what gears? u mean splined shafts right?, (which btw are called flanges by Nissan) "

I don't know what you're talking about here.

"ring gear being centered in the pumpkin doesnt correlate to long or short shaft eh? the ring gear is offset just like every other ring and pinion settup, and the offset of the ring gear flange on the diff. has no correlation to the center of the diff."

Well.. it may not be related. But that's how Nissan did it. It's helpful advice to anyone who isn't very organized. "oh long shaft goes on the long side of the diff, short shaft goes on the shorter side". Isn't that easier?


"secondly , uh...., but isnt the diff upside down in that pic?, right side in pic is LHD drivers side and left is pass. eh?"

You're lookin at the diff from up top, with the bottem of the diff facing you. That's why I was relating to the PIC..with teh diff OUT of the car. So incase your'e doing the install, and you have internet access, you can LOOK at the pics..and go OHHH THat's how it goes!

"anyhow, i was under the impression that vlsd's had long side on the right, but after thinking about this hlsd, apparently the left side needs the longer oil grooved surface."

I don't know, because I originally had a stock open diff.

hERE DAMNIT

ultraDorksGarage

[QUOTE=Smog Tech]Took this two nights ago.

When looking at the pic.. the left side is the driver side..the right side is the passenger side.

QUOTE]


this is really weird.... im not kidding, the diff looks backwards... the ring gear is supposed to be on the left side in r200's, i swear...?..?..?

im very interested in this because i have only torn down an r200 half drunk and it wasnt my car... but id really like to know... isnt that diff upside down, maybe i was half drunk, but i swear thats the top of the diff closest to the camera in the pic.

QUOTE=Smog Tech]It's longer so the gears will reach the center of the differential.


QUOTE]

i was questioning what gears are u talking about reaching the center of the diff? the spider gears on an open diff are pinned into place and dont have anything to do with the sideshafts.

ultraDorksGarage

[QUOTE=Smog Tech]"
LOL, yes, now u have flipped the pic around correctly,
that makes more sense, u were talking with pic upside down in original post confusing the shizz out of me

btw i like how your clout bucket says clout backwards now, i was wondering how u rectified the pic without just saying u are looking at diff carrier from the top.

Ritz S14

Dude.. Now i'm totally confucked. I didn't mean to flip it around, i was messin around to see what it would look like and i forgot to flip i tback.

ultraDorksGarage

orig pic is upside down not mirror imaged...

infinitexsound

ultraDorksGarage 1 word "photoshop" cause forreal dude ur starting to confuse me...i had to take a second look and go pop open my spare diff just to make sure.....

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S14 TrackSlut coming to a raceway near you...
510 TimeAttack on its way...

ultraDorksGarage

lol, dude he had pic upside down in orig pic(at the top of thread not right above), thats why i was like "what are u talking about"

now hes got it photoshop mirroed not flipped correctly, lol

either way, now that he clarified the fact that his original post was backwards i understand what hes trying to say