ka and sr transmission bolt up

[scherger_16]

is the transmission from a 1990 ka24e the same bolt up as a sr20det. do they have same gear ratio. whats different about them if there is a difference.

[BIGTIMER_240]

i think the only diffrence is the bell housing.

[Chris28]

Bellhousing is different but you can bolt the front half of the bellhousing to the ka or sr back half, and vice versa. The ka's 5th gear is a little taller. Those are the only differences. There is a write up on here (I think by bart) on how to swap the bellhousings.

[spooled240]

just curious, has anyone used the 6 speed from the s15 in the ka?

[Chris28]

Hmmm, I don't think so. That transmission is kind of weak, and 6th gear isn't really that much taller, the ratios are just closer. I know Broadfield is running it with his sr, but i don't think anyone with a KA is running one.

[adrianfromthecastle]

Hmmm, I don't think so. That transmission is kind of weak, and 6th gear isn't really that much taller, the ratios are just closer. I know Broadfield is running it with his sr, but i don't think anyone with a KA is running one.

a lot of people say that, but Blitz seemed to proved that wrong. They've managed to maintain 420whp on their stock s15 transmission.

[Chris28]

a lot of people say that, but Blitz seemed to proved that wrong. They've managed to maintain 420whp on their stock s15 transmission.

Then I apologize for the misinformation lol. I always heard that they were weak.

[jeff420]

just curious, has anyone used the 6 speed from the s15 in the ka?

im curious about this as well. i wouldnt mind having a 6 speed in my 240.

[spooled240]

Hmmm, I don't think so. That transmission is kind of weak, and 6th gear isn't really that much taller, the ratios are just closer. I know Broadfield is running it with his sr, but i don't think anyone with a KA is running one.

The spec R has a lower final drive also 3.7 and a 6 gear ratio of .77(info off http://www.carfolio.com/specif...27291)

the ka's 5th gear according to the FSM is .76 so you're right it won't make much of a difference at all. You will be better off getting a lower final drive.

But if the spec R transmission works on the essars, it is bound to work with the ka. The only advantage you'll really get is acceleration tho.

[adrianfromthecastle]

fyi, s15 speed sensors are located on their diff, not on the transmission like s13/s14 trannies.

Sooo... if you swap the s15 6-sp, you'll need to get the diff as well.

[spooled240]

the hlsd is superior to our vlsd's anyway from what i heard.

this is off topic but hey any of you guys heard about re-calibrating your speed sensor for bigger wheels/tires/etc. on OBDII?

[adrianfromthecastle]

the hlsd is superior to our vlsd's anyway from what i heard.

It was more or less a reference to the diff housing, regardless of what's inside of it.

[Dittoz7]

Now It Comes Down To Cost...:|

[White Comet]

the hlsd is superior to our vlsd's anyway from what i heard.

they arent superior, they're just better for different things

[adrianfromthecastle]

they arent superior, they're just better for different things

[brizanden]

the hlsd is superior to our vlsd's anyway from what i heard.

this is off topic but hey any of you guys heard about re-calibrating your speed sensor for bigger wheels/tires/etc. on OBDII?

dont u just recalibrate the needle on the speedo? also doesnt adrian mean u would need the s15 pumpkin and guts? idk if anyone has ever done the s15 pumpkin onto a s13/s14 have they? and adrian im pretty sure the 6 speed is know to be not that great. or else why would nismo make a nismo 6 speed for the sr and specifically state it was to alleviate the fact the gears are cut so small?

[adrianfromthecastle]

hey... all i know is that that Silver s15 from Blitz still rocks their factory transmission and is putting over 400whp. that's all.

[brizanden]

maybe their driver is very careful?

[adrianfromthecastle]

[scherger_16]

i got my sr transmission but second gear grinds and third in high rpm im thinking it probly syncros. i dont know why but both my ka and sr transmission did this does any one know of a rebuild kit for the sr transmission maybe a racing one because i know im not easy on my transmission but i would thinks they should last a little better then what it has.

[H8tred]

The reason the 6 speeds are weak is because the use the 5 speed housing. So everything is a hair smaller. I'm willing to bet that most people who have actually had the 6 speed fail on them was also putting them through a lot of driveline shock.

For most people on here, the 6 speed would be just as dependable as the 5 speed. However, it would never work on a KA-T due to the torque at lower rpms. I guess ultimately it all has to do with your powerband, and where in the rpm range it is. The blitz car made that kind of power at high rpms, once you're rolling, you really can't do anything other than miss-shift to hurt the transmission.

[spooled240]

true that, the s15 6 spd will probably break behind a 400 hp drag car but maybe not so much behind a 400 hp autocross car just because of the differences in the torque bands and how much shock the transmission experiences.

sidenote: I thought my speedo was off, but I was pacing one of those new civics with HUD and I found out that my speedo matched their speed...and yes i was scouring cars with HUD on the freeway so I could compare