S-15(Silvia) 6 Speed transmission Question

[GT Ranma]

Hiyas ^^ But does anyone know about the gear ratio for this transmition? I am getting an S-15 Silvia clip with the 6speed transmission and (this might seem petty) am wondering exactly what ratio defrential I should buy to go along with it ^^;; We also got an Audi S4, it has a 6 speed, but the gears are so close together you have to shift SOO often it's annoying. So I'm wondering if the 6-speed in the S-15 is like this, then I might go a higher ratio then normal, if not keep it about stock.

Is the 6-speed even stock in the S-15's O_o; I never had one, and my friends over there didn't either, so it was news to me when I saw one for sale with one ^_^;; Oh well, can't know everything.

[SpeedRacer1]

http://www.nissansilvia.co.nz/...e.htm

If you are getting an S15 SR20DET then it only comes with a 6 speed. You need to use the 6 speed driveshaft and S15 rear differential unless you want to go custom.

Also the speed sensor for the S15 is in the rear differential not the transmission like other SR's so you'll have to work that out.

[GT Ranma]

Thanks, that was very informative ^^ Hrm, might be worth getting the S15's differential to then. . .

[dareo]

You'll want to use the S15 differential for the speed sensor, the helical LSD, and because it should be fairly new and low mileage. You will also want a custom driveshaft made if you have an S13, or you can mod your S14 to accept the S15 driveshaft. You will be shifting a lot with that S15 box, it has a lower final drive than a regular 5 speed.

[GT Ranma]

Yeah, I knoticed ; ;

Would the transmission in the S-14 240SX mount up on the S-15's SR engine? That will save alot of time and trouble that way ^^ We can do a little modifications, but not to much :p My welder is half blind now >.< And he doesn't want to get glasses *sigh*

[SpeedRacer1]

It will but you need to use the S14 flywheel and clutch.

[ItzGenX]

Yeah, I knoticed ; ;

Would the transmission in the S-14 240SX mount up on the S-15's SR engine? That will save alot of time and trouble that way ^^ We can do a little modifications, but not to much :p My welder is half blind now >.< And he doesn't want to get glasses *sigh*

You will need the S13/S14 Bell housing if you use a 240SX transmission (might as well get an SR 5 speed transmission). Also like stated by SpeedRacer, you will need to match the clutch and flywheel with the transmission that's on it, not the motor.

[aznromeox]

Hiyas ^^ But does anyone know about the gear ratio for this transmition? I am getting an S-15 Silvia clip with the 6speed transmission and (this might seem petty) am wondering exactly what ratio defrential I should buy to go along with it ^^;; We also got an Audi S4, it has a 6 speed, but the gears are so close together you have to shift SOO often it's annoying. So I'm wondering if the 6-speed in the S-15 is like this, then I might go a higher ratio then normal, if not keep it about stock.

Is the 6-speed even stock in the S-15's O_o; I never had one, and my friends over there didn't either, so it was news to me when I saw one for sale with one ^_^;; Oh well, can't know everything.

They have the Spec R which is the Sr20de"T". That came with the 6spd transmission.

Then they had the other one which wa a sr20de. Non turbo 5spd.

The s15 transmission is close ratio. So meaning. its exactly like your s4. Some guys choose to put 5spd trannys to replace the s15 because of the constant shifting, also the spd is weaker. BTW its a tad big bigger as well.

[SpeedRacer1]

S15 Silvia Spec R = SR20DET 6 SpeedS15 Silvia Spec S = SR20DE 5 Speed

R's will always have turbo 6 speeds, S's will always have NA 5 speeds. But both the R and S share the same auto 4 speed transmission.

[GT Ranma]

They have the Spec R which is the Sr20de"T". That came with the 6spd transmission.

Then they had the other one which wa a sr20de. Non turbo 5spd.

The s15 transmission is close ratio. So meaning. its exactly like your s4. Some guys choose to put 5spd trannys to replace the s15 because of the constant shifting, also the spd is weaker. BTW its a tad big bigger as well.

Naw, I had a 1995 which was the newest of anyone I knew. Everyone else had S-13's because they didn't want to buy an expensive car then mod it.

Hrm, since the 240SX I have is a 1995, is there any diffrence between the bell housing on it now, and the JDM one? So, can I use the transmistion/clutch that is in it now and just bolt it onto the engine is what I am asking. I think you are all saying yes, but I want to be 100% sure ^^

Oh, and I got someone who can put the two wireing harnesses together to make 1 that works already ^^; If it is needed as I was told.

[SpeedRacer1]

JDM and USDM belhousings are different. Clutches and flywheels are different. I seriously doubt the KA flywheel will bolt onto the back of an SR let alone clear the bellhousing and line up with the starter.

[180fan]

KA flywheel will NOT bolt to the SR. Different starter as well. The clutches are also different. The s13 and s14 SR20DET share the same clutch and flywheel. The S15 with 6spd use a different clutch and flywheel.

[VitaminT]

So with this said can I use the 6spd on my redtop if I have clutch, flywheel, transmission, diff?

[racer52]

I have a s-15 rearend i'm looking to get rid of. it has the diff axuls and control arms. and the brack discs. let me know if you might be intrested

[SpeedRacer1]

So with this said can I use the 6spd on my redtop if I have clutch, flywheel, transmission, diff?

And driveshaft. And half shafts if you use the diff.

[GT Ranma]

I have a s-15 rearend i'm looking to get rid of. it has the diff axuls and control arms. and the brack discs. let me know if you might be intrested

Woo, do you have the driveshaft for it too? ^^ I am interested, but I don't know how long till I can get the engine. . . We didn't make as much money as we thought we would, so a little low on cash. Going to wait a few months to buy the engine now, we have the 3.5K to get the engine, just not enough to buy all the other things we want to do with it ^^; And if something happens, we have no money to replace or buy what we need. Soo, how long are you going to keep them for?

Hrm *rubs head* I see.

[racer52]

i'm in the proces of building an sr20 for my s-14. but im not going to be done till after summer. So i will have it for a while but if i haven sold it by then i might use it. i'm looking for 500 for it. But i don't have the drive shaft. the only other reson i wouldn't sell it is i might have some rear control arm damage but i haven't fully checked it out.