[Baker]

Is there any way to ID a Zc transmission? I realize that the ZC takes the larger, Integra axles, but are there any numbers or markings on the tranny to positively ID it?

 

[downest]

If it bolts to a D series, and it has the larger axles, it's a ZC. IF you figure out how much it should spin in X gear vs another tranny that it might be, you should be able to figure it out. Does it have LSD?

 

[Baker]

If it bolts to a D series, Does it have LSD?

It does bolt up an no, but that would have been a bonus if it did.

After looking it over it looks to be just an SI transmission, plus the L3 on it is a dead giveaway, which is not a problem since i needed another one anyway.

But a Zc tranny does not have any markings or numbers on it to differentiate it.

 

[downest]

Wait, so it's an Si tranny? It has the smaller axles?

 

[Baker]

Wait, so it's an Si tranny? It has the smaller axles?

Well i don't have any extra CRX axles kickin around to put into it, but at this point i am assuming yes. It does say L3 on it, but that is the only identifying marks.

No big deal really, i needed a new transmission anyway.

 

[downest]

Equal length axles are nice though. My ZC tranny case *I think* says L3, it's really faded and hard to tell though.

 

[Baker]

Equal length axles are nice though. My ZC tranny case *I think* says L3, it's really faded and hard to tell though.

So the only REAL way to tell is what size axle the tranny will accept?

HMMMMMMmmm......

If i had some pics to compare the two transmissions or some measurements, something....

 

[downest]

Fine... I'll check... they seem to be about the same. Pop the case open and you'll know fo sho.

 

[shorte]

Yeah, my zc has the "L3" sticker on it too.

 

[Baker]

Did some more searching and have come to the conclusion, the only way to identify a Zc transmission is by trying Integra and Crx axles out and seeing how they fit.

 

[downest]

I couldn't find a visible difference other than the axle size. The only other thing is that the plastic speedo gear on the ZC is black, the one on the Si is white.

 

[Tougeoni]

This should help out

http://www.crxcommunity.com/viewtopic.php?t=246&sid=4cf645b0f7fb15f34c483c9c696aee19

 

[Baker]

I guess there are no identifying marks or numbers (like other Honda transmissons) other than hole size where the axle goes.

 

[Tougeoni]

And this, which was also in the link i posted up.

Original info by "stick"

"Identifying a transmission by mathematical calculation

By placing the transmission in 5th gear and turning the input shaft 10 times and measuring how many times the differential rotates, you can theoretically figure out which transmission you have from the following equation:

10 / (5th gear ratio) / (Final drive ratio) = (# of turns of the differential)

Examples:

CRX HF
10 / .694 / 3.250 = 4.43 turns of the differential

CRX DX
10 / .771 / 3.888 = 3.34 turns of the differential

CRX Si
10 / .771 / 4.25 = 3.05 turns of the differential

DOHC ZC
10 / .878 / 3.888 = 2.93 turns of the differential

SOHC ZC (same gearing as CRX Si)
10 / .771 / 4.25 = 3.05 turns of the differential

SOHC ZC ZXi
10 / .771 / 4.437 = 2.92 turns of the differential

Obviously this method doesn't help you differentiate the normal DOHC ZC transmission from the SOHC ZC ZXi transmission, so you will also need to do a test in 1st gear.

10 / (1st gear ratio) / (Final drive ratio) = (# of turns of the differential)

Examples:

DOHC ZC
10 / 3.250 / 3.888 = 0.79 turns of the differential

SOHC ZC ZXi
10 / 3.250 / 4.437 = 0.69 turns of the differential"

 

[Baker]

And this, which was also in the link i posted up.

Original info by "stick"

"Identifying a transmission by mathematical calculation

By placing the transmission in 5th gear and turning the input shaft 10 times and measuring how many times the differential rotates, you can theoretically figure out which transmission you have from the following equation:

10 / (5th gear ratio) / (Final drive ratio) = (# of turns of the differential)

Examples:

CRX HF
10 / .694 / 3.250 = 4.43 turns of the differential

CRX DX
10 / .771 / 3.888 = 3.34 turns of the differential

CRX Si
10 / .771 / 4.25 = 3.05 turns of the differential

DOHC ZC
10 / .878 / 3.888 = 2.93 turns of the differential

SOHC ZC (same gearing as CRX Si)
10 / .771 / 4.25 = 3.05 turns of the differential

SOHC ZC ZXi
10 / .771 / 4.437 = 2.92 turns of the differential

Obviously this method doesn't help you differentiate the normal DOHC ZC transmission from the SOHC ZC ZXi transmission, so you will also need to do a test in 1st gear.

10 / (1st gear ratio) / (Final drive ratio) = (# of turns of the differential)

Examples:

DOHC ZC
10 / 3.250 / 3.888 = 0.79 turns of the differential

SOHC ZC ZXi
10 / 3.250 / 4.437 = 0.69 turns of the differential"

HOLY CRAP!!!

Why couldn't Honda just put a stamp on it! :x

 

[downest]

Are you building a hybrid or just using the ZC?

 

[Baker]

Are you building a hybrid or just using the ZC?

If it were a Zc i would have liked to use it, in one way or another, either using the gears from it or using the entire tranny.

DAMN Honda again for not stamping it, like it has before with so many other transmissions, these have to be the "special" ones. :x

 

[downest]

So it's an Si, or what?

 

[Baker]

So it's an Si, or what?

At this point, unsure.

I don't have any 90-93 teg axles nor do i have any Crx axles laying around to "test fit".

I have also yet to use the mathematical way of figuring out what transmission it really is.

 

[downest]

90-93 teg axles huh... I still have a new set of them...