Transmission Swap
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GroundZero
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Transmission Swap
hey everyone, i have a question. i've heard that the 300zx 5-speed transmission can be swapped onto the KA with certain modifications. does anyone know what modifcations need to be made, or know of a site that shows the procedure for performing this swap? i know of course that the bellhousing of the z transmission will have to be modified and that a custom driveshaft needs to be made, but what about the input shaft and clutch setup? thanks in advance everyone.
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CA18_Dreams
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deftdrummer
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CA18_Dreams
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deftdrummer
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GroundZero
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deftdrummer wrote:so maybe the 300zx transmission is just "cooler" because the 300zx is just "cooler"??? sheesh!
hey i'm no riceboy trying to look cool by swaping in a 300zx transmission. i'm going to be building my ka and i've read alot about the KA transmission having problems with power levels above 350 rwhp, i'm just planning ahead. i know a guy that has a 300zx with about 750 rwhp and hasn't had a problem with his transmission yet, therefore i figure that it'll be able to handle the 450-500 i'm hoping to get out of the ka.
Heh, actually I have a question about transmission swaps too, so i might as well shoot - can i bolt either an SR or aftermarket 6-speed onto a KA? I drove a friend's M3 for a couple of hours the other day, first 6-speed I've spent a lot of time with...I like it, I like it a lot. Ideally I want the Getrag that's on the M3/5, but I figure an SR transmission is probably both cheaper and easier to drop in. GZ, have you looked into that route at all?
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GroundZero
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Why not just save up and put the 6-speed in now, instead of investing a lot of time, money and effort with the 300zx swap and then going through it all over again for the hollinger? I dunno, I like to do things once and have them the way I ultimately want them, even if I have to wait and save a bit more than I'd like...to each his own I guess.
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s13sr20chris
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ok, the ka transmission is about the same as the sr transmission. the difference is in the bellhousings. the vg transmission is one tough hombre. the clutch spline pattern/input shaft pattern is exactly the same. the flywheel/pressure plates are similar in size but im not sure if exactly the same. i have seen a million of both, but not side by side. the vg transmission is a two piece case so the bellhousing is not removable, unless you want to split the case. if you dont do your own internal trans repair you could go with a borg-warner. there are a million of them on the road in a million different cars(gm f-body, some corvettes, mustang, viper, etc). there are also many companies that make bellhousings for them. the downside is that they are a big pain in the but if you want to overhaul it yourself. i will never open one up again without ALL the special tools necessary(re: fancy dummy shaft). ideal setup? getrag 6 speed. check jdm yards for 6 speed supra. crazy idea? zf 6 speed transaxle from a corvette. no undercar transmission, no rearend, better weight distribution. whole transaxle goes in the rear. the downsides here are pretty obvious.
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s13sr20chris
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well i think there would have to be some serious spatial rearrangement going on(bye bye gas tank and rear seat area). i only mentioned it to spark conversation. doing things like that is common in japan, but in the us we usually do stuff that makes more sense. would require custom bellhousing no doubt. no idea about input shaft either. kind of a long shot i know. sounds like $$$ is not to much of a problem for ground zero if he is considering a hollinger.
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GroundZero
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s13sr20chris wrote:well i think there would have to be some serious spatial rearrangement going on(bye bye gas tank and rear seat area). i only mentioned it to spark conversation. doing things like that is common in japan, but in the us we usually do stuff that makes more sense. would require custom bellhousing no doubt. no idea about input shaft either. kind of a long shot i know. sounds like $$$ is not to much of a problem for ground zero if he is considering a hollinger.
haha i repeat... that hollinger will be a good ways down the road. s13sr20chris thankyou very much, your information was exactly what i was looking for. the hollinger is about 5-6 thousand, the way i'm thinking it through i could do the z swap for less than 1k. now that i know the input shaft and splines match up than i'm almost certain i can do this. it won't be right away but eventually it'll happen. i'll make sure to take pics and write up a tech article.
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GroundZero
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s13sr20chris
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well, im going on pure memory here. the bellhousing area is about the same(i think). the middle section(camel hump) on the ka is roughly 10" in diameter; on the vg its like 13". tailshaft prob extends a little farther too. not even gonna guess on that. i imagine you will have to massage the tunnel a little.