Six speed transmission for the KA24DE

Post by **nissan240sx92** » Sat Aug 28, 2004 10:33 am

Does anyone know if they make a 6 speed trany or get one custom made for the ka24de motor? Is it also possiable to convert my transmission into a 6 six i have been told it could be done but more people say that it cant be done. Could any one help me out with these one thanks

Post by **Onizuka** » Sat Aug 28, 2004 10:33 am

The KA24 shares the same gearbox as the SR20, so of course there are plenty of aftermarket gearsets availible. HKS makes a bunch im pretty sure, be prepared to pay like $6,000 for just the 6 speed gearset. Then there is installation, which will cost alot because its a good idea someone qualified to install it.

Post by **nonchalant rage** » Sat Aug 28, 2004 10:33 am

how hard would it be to mate an sr20 transmission to a ka24 engine?

Post by **msaskin** » Sat Aug 28, 2004 10:33 am

It's the same transmission. The only difference is the bell-housing, which can be switched between the two transmissions in about 30 minutes if they're both off the car.

~matt

Post by **hannibal** » Sat Aug 28, 2004 10:33 am

I believe it only requires the KA bellhousing, so it shouldnt be that big of a deal. Now finding a S15 6spd may cost you a bit, and theyre supposed to be weaker than the earlier 5spd.

Post by **hannibal** » Sat Aug 28, 2004 10:33 am

Yeah, what he said...

Website · Post by **s13sr20chris** » Sat Aug 28, 2004 10:33 am

the sr 6 speed is not anything like the 5 speed. it is not made by nissan and the bellhousing/front case half is not interchangable.

Post by **msaskin** » Sat Aug 28, 2004 10:33 am

Interesting.

I'm assuming that it's probably a Getrag transmission, right?

~matt

Post by **Onizuka** » Sat Aug 28, 2004 10:33 am

EDIT: Im retarded :alcoholic

Post by **IvoryJ30t** » Sat Aug 28, 2004 10:33 am

s13sr20chris wrote:the sr 6 speed is not anything like the 5 speed. it is not made by nissan and the bellhousing/front case half is not interchangable.

you beat me to it.

the 5 speeds can swap front cases all day, but the six speed is only for the SR.

no swapping cases to get the 6 speed on the KA. its not gonna happen.

Post by **IvoryJ30t** » Sat Aug 28, 2004 10:33 am

J-Spec Tuner wrote:You sure about that? S15 block = S14 block, s13 transmission = S14 transmission (with minor gear ratio changes).

Im pretty sure the S15 transmission bolts up, but there are some problems. First, im pretty sure you would have to use an S15 flywheel and clutch setup, hard and expensive to find, just like the transmission itself. Second, the speed sensor for the S15 is located in the rear differential as opposed to the gear case like in S13 and S14 SR's, and the final drive is different, pretty much requiring you to use the S15 differential as well. Again this peice is hard to find and fairly expensive, but at least all S15 differentials are R200 helical limited slip. Oh yeah and you would also need either a S15 driveshaft (modification might be required) or a custom one.

that would be fine if you were bolting the trans up to an SR.

there is no easy way to get the 6 speed on the KA.

Post by **Onizuka** » Sat Aug 28, 2004 10:33 am

Brain fart, thought i was in the SR section for some reason :P

My apologies :beatfreak

Post by **Doomed2Walk** » Sat Aug 28, 2004 10:33 am

Maybe I'm wrong, but I thought the S15 motor/trans were the same as the S14, the S15 Spec-R is the one with the 6-spd trans.

Post by **Chingon** » Sat Aug 28, 2004 10:33 am

how 'bout internals...do you think s15 gears are swappable? BTW, I've heard the "s15's transmission is weaker" argument before because ppl claim they had to stick more gears in the same space. But are the s15 synchros still yellow metal? Maybe they switched composition (could verify w/recommended oil) of the metals and in fact is just as strong or stronger than the 5 spd?

Post by **nissan240sx92** » Sat Aug 28, 2004 10:33 am

thanks for the help and thanks for answering my question. what would be a good gear ratio for the ka 5 speed with over 400hp

Post by **Nameless EJ6** » Sat Aug 28, 2004 10:33 am

What makes you want 6 gears? You don't even need it.

Website · Post by **s13sr20chris** » Sat Aug 28, 2004 10:33 am

J-Spec Tuner wrote:Brain fart, thought i was in the SR section for some reason :P

My apologies :beatfreak

maybe not. i believe that hks offers a 6 speed gearset that fits in the 5 speed case. the oe 6 speed will not work with a ka but an hks 6 speed might.

you may continue with teh assumption of retardation though.:pface

Website · Post by **s13sr20chris** » Sat Aug 28, 2004 10:33 am

J-Spec Tuner wrote:EDIT: Im retarded :alcoholic

heh, quoted the wrong post.

Post by **ca18datsun510** » Sat Aug 28, 2004 10:33 am

i have heard of rb guys putting supra 6 spds in there cars, therefore if you swap a ka bellhousing on instead of a rb bellhousing, it should work.

do a search, cause i dont rember where i heard this.

mike

Post by **hannibal** » Sat Aug 28, 2004 10:33 am

there is a guy on NICO with a RB and supra/getrag 6spd. he had a thread in the rb forums a while ago...

Post by **GEO** » Sat Aug 28, 2004 10:33 am

Nameless EJ6 wrote:What makes you want 6 gears? You don't even need it.

ugh..... he can tune his gears for a much higher top speeed

Post by **Def** » Sat Aug 28, 2004 10:33 am

GEO wrote:ugh..... he can tune his gears for a much higher top speeed

What's the point when a stock KA transmission gives a top speed over 165mph? Plus you still need the power to pull up to that speed.

Post by **nissan240sx92** » Sat Aug 28, 2004 10:33 am

i want the six gears cuz i have a friend who can get me custom gear ratios and the six speed will let me have a little more top speed ?right or am i wrong ?

Post by **IvoryJ30t** » Sat Aug 28, 2004 10:33 am

can you hit redline in 5th?

if you cant top the car out, then having taller gears will just slow you down.

Post by **nissan240sx92** » Sat Aug 28, 2004 10:33 am

i can hit the red line in 5th gear. dont ask me how fast im going cause my speedometer doesn't read that high.

the only reason why i can hit that fast is because of the jim wolf ECU. if you have the right gear ratio for the amount of HP then it wouldn't be a problem? right?

Post by **BaliLover** » Sat Aug 28, 2004 10:33 am

I'd like to have a 6th gear for my SR, my normal cruising speed puts me around 3000 in 5th, and I'd like to have it down around 2000 for gas milage.

Post by **TristanDET** » Sat Aug 28, 2004 10:33 am

I have seen a 6speed sequential for $12,000

Post by **Onizuka** » Sat Aug 28, 2004 10:33 am

s13sr20chris wrote:maybe not. i believe that hks offers a 6 speed gearset that fits in the 5 speed case. the oe 6 speed will not work with a ka but an hks 6 speed might.

you may continue with teh assumption of retardation though.:pface

Yeah I know about the HKS hardware compatiblity, I got mixed up and it was sounding like I was arging that the S15 6 speed would fit on the KA.

Post by **Onizuka** » Sat Aug 28, 2004 10:33 am

HKS 6 speed gearset for the S13 transmission is around $7500 plus shipping from japan.

Gear ratio's:

1st: 2.773 2nd: 1.984 3rd: 1.548 4th: 1.246 5th: 1.000 6th: 0.807

Post by **bigtom** » Sat Aug 28, 2004 10:33 am

it was said before and i will repeat it. the 6spd is made by a different manufacturer than the 5 spd. you will never get any 5spd case to fit the 6spd box.

i can get some gears a little cheaper than hks or the other big japanese mfg.

3.760 1st2.269 2nd1.645 3rd1.251 4th1.000 5th .843 6th

also i have an option to ad a speedo to the s15 transmission to avoid the rear end speedo problem.

Six speed transmission for the KA24DE

Six speed transmission for the KA24DE

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