zc tranny?
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zc tranny?
I have a d15b vtec and I have the hf tranny still. I am having a hard time finding a si tranny but I did find the ZC tranny from hmotorsonline. I was wondering if I could use that instead?Oh, the clutch thats in the car has 21 splines. Would it be compatible with it?
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From: colorado springs, co, usa
Re: zc tranny? (C-REX 88)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by C-REX 88 »</TD></TR><TR><TD CLASS="quote">I have a d15b vtec and I have the hf tranny still. I am having a hard time finding a si tranny but I did find the ZC tranny from hmotorsonline. I was wondering if I could use that instead?Oh, the clutch thats in the car has 21 splines. Would it be compatible with it?</TD></TR></TABLE>
with ZC transmission, you will need a ZC intermediate shaft and 90-93 Integra axles - if the car is HF, you will need to swap front knuckles/hubs for ones from DX or Si
with ZC transmission, you will need a ZC intermediate shaft and 90-93 Integra axles - if the car is HF, you will need to swap front knuckles/hubs for ones from DX or Si
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From: San Diego
Re: zc tranny? (jlicrx)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlicrx »</TD></TR><TR><TD CLASS="quote">
with ZC transmission, you will need a ZC intermediate shaft and 90-93 Integra axles - if the car is HF, you will need to swap front knuckles/hubs for ones from DX or Si</TD></TR></TABLE>
NO you DONT...
u dont need to run a intermediate shaft...
if u want to keep ur HF axles, just run B series pass side inner joints on ur stock HF axles that way u can keep the small spline hubs and keep the stock axle's
if ur on a budget this is what i would do, fast cheap and easy NO need for looking for hard to find inter shafts and equal length axles
...
with ZC transmission, you will need a ZC intermediate shaft and 90-93 Integra axles - if the car is HF, you will need to swap front knuckles/hubs for ones from DX or Si</TD></TR></TABLE>
NO you DONT...
u dont need to run a intermediate shaft...
if u want to keep ur HF axles, just run B series pass side inner joints on ur stock HF axles that way u can keep the small spline hubs and keep the stock axle's
if ur on a budget this is what i would do, fast cheap and easy NO need for looking for hard to find inter shafts and equal length axles
...
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From: I sell JDM engines too, CA, US
Re: zc tranny? (Nerologic)
Nero
I thought this combo netted a longer than stock axle???
At least on 4G Civics/2G CRXs?
Besides you CAN'T RUN an INTERMEDIATE SHAFT unless there are at least a couple provisions on the back of the block for mounting it.
Every D15B I've seen doesn't have this.
I thought this combo netted a longer than stock axle???
At least on 4G Civics/2G CRXs?
Besides you CAN'T RUN an INTERMEDIATE SHAFT unless there are at least a couple provisions on the back of the block for mounting it.
Every D15B I've seen doesn't have this.
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From: San Diego
Re: zc tranny? (HumanResource)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HumanResource »</TD></TR><TR><TD CLASS="quote">Nero
I thought this combo netted a longer than stock axle???
At least on 4G Civics/2G CRXs?
Besides you CAN'T RUN an INTERMEDIATE SHAFT unless there are at least a couple provisions on the back of the block for mounting it.
Every D15B I've seen doesn't have this.</TD></TR></TABLE>
the way that i do this u only need swap out the inner joints, that way the axle stays the same length, u dont need to run the intershaft because ur running unequal length axles...
as for the the block not having the provisions for the inter shaft, most blocks have the points for the shaft, they just dont have them threaded out
its as easy as just threading one or two of the points, i had to do this on a z6 i had that i worked on a while ago...
I thought this combo netted a longer than stock axle???
At least on 4G Civics/2G CRXs?
Besides you CAN'T RUN an INTERMEDIATE SHAFT unless there are at least a couple provisions on the back of the block for mounting it.
Every D15B I've seen doesn't have this.</TD></TR></TABLE>
the way that i do this u only need swap out the inner joints, that way the axle stays the same length, u dont need to run the intershaft because ur running unequal length axles...
as for the the block not having the provisions for the inter shaft, most blocks have the points for the shaft, they just dont have them threaded out
its as easy as just threading one or two of the points, i had to do this on a z6 i had that i worked on a while ago...
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From: Austin, TX, USA
Re: zc tranny? (Nerologic)
Note: He says he has a D15B VTEC - that's not a standard HF engine. I don't know the later D15Bs, but is it possible it might have provisions for mounting that intermediate shaft? I know the Si (D16A6) block has the holes already drilled and tapped...
Also, I've *heard* (can't verify it, haven't tried it) that you can run some sort of Accord ('86-89 I believe, since the later ones are equal-length) axle on the driver's side, and it's supposed to fit the ZC diff and be the right length to do away with the intermediate shaft. Again, I reiterate: I have no first-hand knowledge of this. If I remember right, a guy named "dohcrxl" over on the CRX Resource had pointed it out. He's working as a mech at one of Wisconsin's largest Acura dealerships.
Other things to consider: The 21-spline input shaft means you've got an '88. Of course, you already know that - hence your screen name.
That's a unique year for transmissions. You can use an '89 or a '90-'91, but you'll want to replace your clutch and flywheel to do so. '88s used a smaller clutch disk surface, '89s a little larger, and '90-'91s a little larger still. As a general rule, it's easiest just to match clutch and flywheel to the transmission year. There are ways around this, of course... There's a Prelude disk that's 21 splines and the larger (212mm?) surface size, so you can use that on an '88 tranny with a '90-'91 flywheel, for instance.
If you order a ZC transmission, BE SURE TO TELL THEM IN NO UNCERTAIN TERMS HOW MANY SPLINES YOU WANT ON THE INPUT SHAFT!! I've been stung by this (because I asked for a '90-'91, NOT specifically a 20-spline input shaft - that was the guy's honest-to-christ answer! Does not one imply the other?), and so have numerous other people. You tell them exactly what you want, make a deal for an intermediate shaft if you want/need one (it's not included, and they charge extra for it, even though they really have no use for them without the ZC tranny), and make them fax you a written confirmation of exactly what they're going to send you.
And there are other things you can do... If you like the ZC's close-ratio gears, but hate it's DX-identical 3.88 final drive ratio, you can build a hybrid transmission. Or buy one from me. It uses ZC 1-4 and Si 5th and final/diff unit. You get the closer gearing, but keep the better highway cruise of the Si and the more aggressive Si final ratio. And you get to use stock DX/Si axles on it, and no worries about the intermediate shaft. And they come fully rebuilt with all brand new bearings, synchros, and seals. All internal parts are inspected, and any parts that are iffy are tossed and replaced. Fun stuff.
I had a special one built for my CRX; instead of the Si 5th gear, I went with an HF 5th, because I liked the lower-rpm highway cruise of the stock DX. The HF 5th/Si FD gets pretty close to that. 80mph in 5th gear is around 3600rpm, instead of the 4000rpm of the stock Si.
Mike
Also, I've *heard* (can't verify it, haven't tried it) that you can run some sort of Accord ('86-89 I believe, since the later ones are equal-length) axle on the driver's side, and it's supposed to fit the ZC diff and be the right length to do away with the intermediate shaft. Again, I reiterate: I have no first-hand knowledge of this. If I remember right, a guy named "dohcrxl" over on the CRX Resource had pointed it out. He's working as a mech at one of Wisconsin's largest Acura dealerships.
Other things to consider: The 21-spline input shaft means you've got an '88. Of course, you already know that - hence your screen name.
That's a unique year for transmissions. You can use an '89 or a '90-'91, but you'll want to replace your clutch and flywheel to do so. '88s used a smaller clutch disk surface, '89s a little larger, and '90-'91s a little larger still. As a general rule, it's easiest just to match clutch and flywheel to the transmission year. There are ways around this, of course... There's a Prelude disk that's 21 splines and the larger (212mm?) surface size, so you can use that on an '88 tranny with a '90-'91 flywheel, for instance.If you order a ZC transmission, BE SURE TO TELL THEM IN NO UNCERTAIN TERMS HOW MANY SPLINES YOU WANT ON THE INPUT SHAFT!! I've been stung by this (because I asked for a '90-'91, NOT specifically a 20-spline input shaft - that was the guy's honest-to-christ answer! Does not one imply the other?), and so have numerous other people. You tell them exactly what you want, make a deal for an intermediate shaft if you want/need one (it's not included, and they charge extra for it, even though they really have no use for them without the ZC tranny), and make them fax you a written confirmation of exactly what they're going to send you.
And there are other things you can do... If you like the ZC's close-ratio gears, but hate it's DX-identical 3.88 final drive ratio, you can build a hybrid transmission. Or buy one from me.
It uses ZC 1-4 and Si 5th and final/diff unit. You get the closer gearing, but keep the better highway cruise of the Si and the more aggressive Si final ratio. And you get to use stock DX/Si axles on it, and no worries about the intermediate shaft. And they come fully rebuilt with all brand new bearings, synchros, and seals. All internal parts are inspected, and any parts that are iffy are tossed and replaced. Fun stuff.I had a special one built for my CRX; instead of the Si 5th gear, I went with an HF 5th, because I liked the lower-rpm highway cruise of the stock DX. The HF 5th/Si FD gets pretty close to that. 80mph in 5th gear is around 3600rpm, instead of the 4000rpm of the stock Si.
Mike
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