racinjayson

Plate is the same.

Agent S14

My only question is I am doing a s15 swap with the 6 spd trans what are my diff options apart from the s15 diff since I need the abs module for my Dakota.

racinjayson

There are quite a bit of things in this thread that discuss this very topic, so read through it and if you still have questions I'll do my best.

Agent S14

I have now my question is the Dakota sgi-5 do the trick? There is no specific model in the walkthrough.

Nilsson

Hey guys, really dont know if this is the right thread to ask this question.
But anyway, anyone knows the difference if you take the s15 spec-r 6-speed diff and put it in a s14 kouki sr20det with 5-speed?
Need a welded diff and a buddy of mine got the original from his s15!

Thanks /Nilsson

racinjayson

Man, I wouldn't weld up an s15 diff, but it will work just fine. The only difference is the gearing. Your diff. now is probably a 4.08 or 3.90 where as the original s15 gearing is a 3.69 so your tach. at 65 will be about 300 rpms lower. Like I said ,though, I wouldn't weld it up, because it's already a helical style posi. which by many standards is the best type of posi. you can get. Yes, of course, not for you drifters, but time attack, autocross, and track days there's nothing better.

Nilsson

Damn, I hoped it would be the other way.. Need to get me a 6-speed tranny, always thought my gears are sooooo long if u know what i mean, ~85 topspeed at 2nd gear and ~115 in 3rd.
Got a good price at the s15 diff so might as well use it! thanks for the good answer!

/Nilsson

Croustibat

only the s15 spec R diff is a torsen unit, the S15 spec S (and tbc the auto) is a standard diff.

Sell the S15 spec R diff with the halfshafts, it is worth a bit of money. Dont get a 6spd from an S15, unless you want to change it often. The late Z33 6 spd is really great even for drifting, as it is quite short and precise. I know a pro drifter using one around here. Full kit (including new gearbox from nissan, adapter plate, machining, propshaft, and maybe labor ) is around 4000€.

Another way to make a gearbox "shorter" is the Clarkson way: "POWERRRRRRRRRRRRRR" :mrgreen:

Nilsson

Hehe yeah maybe its a better idea to get one of those then. just thought it would be the easy way out to get a s15 6speed as it fits right on , and i am about to get some more power with new cams and injectors (now currently 280~whp)

Agent S14

My swap didn't come with the shifter does anyone know where I can get a s15 shifter.

S13GG

Speedo gear question:

So I had my s14 speedo drive gear (metal) machined for a 28mm vs 25mm shaft

There are 2 clip groves, but the nismo kit only includes 1, so I only ordered 1

The gear is too wide to expose both groves,

My guess is; put the c-clip in forward groove and the rear housing holds it in place?

Anyone with experience care to chime in?

Agent S14

i am still working on my speedo issue also

kuruptR

Would anyone happen to know:
I have an S14 SR with a Exedy Hyper Single (clutch and fly wheel combo), Would this combo work with the S15 Transmission?
Also, can you swap the bell housing between S15 and S14 to allow the use of a S14 Clutch?

Can anyone post pics on how to install the VSS ring into the S15.

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dawagarage

hello all
pardon me, i dont mean to add clutter to the thread,
i only ask because maybe others could benefit from it.

how does the 6 speed s15 trans compare to the 6 speed z33
trans?

-which one is more plentiful/tangible?
-does it cost more to source the s15 trans OR the z33 and adapter plate
(and/or whatever else it takes to run it)?
-how are the gearings compared to each other?
-which one is stronger (id assume its the z33, but i dont want to assume...)

again, only trying to help and bring more options and info to the community.

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ratsun: dawa (73 datsun 620)
clublexus: properD (97 sc300)

kuruptR

I just backed out of a S15, because the Z33 seems like a better route. Z33 gear boxes are reasonably priced on ebay. I feel the s15 swap costs a bit much for what it is.

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pg240

just got the s15 engine and tranny swap done with a Toda 11lb flywheel and ACT 6 puck street clutch. i drive it almost every day and im so glad i got this setup. just have to sort out the speedometer issue

S13GG

Alright, ^I will document and upload the speedo correction in about a week or so when I get around to finishing it up, with part numbers etc...

pancakes562

Wow, this is a really good write up. I don't plan to do a swap any time soon but when I do I will be coming back to this. Thanks!

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Bernie (NoVA)

Do you still need the shifter lever?
I have an extra for S15.

soundboy

Any problems mating a s15 DET with a s13/14 5 speed box?

shaggy0778

I have an S14 with a relatively stock S15 motor making 304whp 306wtq and the transmission is still holding strong.
However, I am starting to have some issues with the clutch slipping. I have purchased a new clutch and flywheel, but was wondering; do I have to remove the engine to change the clutch? It says in the OP there's no way to get the transmission in and out with the engine in the car. If this is true that makes clutch changes a real PITA

jr_ss

Wrong place to ask said question. Try the actual tech section next time, not the stickier threads.

However, it's not impossible to get the trans out with the motor still in, it just takes some finesse.

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slow_sr20

Does anyone know, can I use an automatic s14 KA driveshaft for the s15 6 speed trans? I found a super old thread from freshalloy where someone said you could. Just looking for clarification before I pay out for a "JDM" s15 6-speed shaft. Thanks.

dorkidori_s13

buy the S15 shaft. the american drive shafts were pieces of shit. the JDM drive shafts didnt use the stupid hockey puck damper on the tranny output shaft that goes to hell in a hand basket (turns into a frayed mess). the JDM drive shafts used standard yolks and a rebuilding center bearing bushing.

or just buy a single piece aluminum drive shaft and enjoy the wonderful 100% direct feeling in acceleration!

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soundboy

The aluminum shafts make the most sense imo

dorkidori_s13

single piece drive shafts arent for everyone though. there is a bit of noise that comes with them since there is no rubber to dampen out drivetrain noise. also, unless you are really familiar with your gear ratios, gearbox rumble from trying to accelerate a too low of rpms can really shake the hell out of the car with a single piece compared to an OE 2 piece.

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slow_sr20

I had an aluminum in my last car. The noise it made was ungodly. I'm looking for oem like qualities. I was hoping for an inexpensive option for now. So does that mean the U.S. Spec auto shaft will work, or no?

shaggy0778

Not my car, but a friend of mine in Jacksonville is making over 400whp on an s15 6 speed. He broke the original trans after 3-4 months of dailying/abuse including launching with 275 radials. He's now on his second

Mustang dyno:

ShakotanGazelle

sooooooooo, anybody have the part number for the speedo drive gear and the associated c clips and bearing to get the speedo to work in an S13?

ive got 2 full s15 setups so i sold all my 5 speed stuff haha and at least one of them has the VSS plug

dwnshft2drft

Speedometer gear mounting kit:
Extension housing 32130-RRS50
Ball 32720-RRS50
Snap ring 32228-RRS50

6 speed with VSS plug are from early s15 the late type dont have them.