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Discussion Starter #1
Ok so I bought a civic as a shell. The civic is a 97 ex the motor and tranny was already pulled supposedly rod knock, it’s a d15z1. The tranny is a zc with lsd. Ok so here’s my question where can I find out about this actual transmission like of it was a jdm or usdm. Is that even possible? I was gonna use the tranny in my 2000 civic hx it has the d16y5 I believe. It’s an automatic so I’m thinking use the spare transmission for a swap. I’m trying to find more info. After tons of searching I have found out a lot but it’s all broad info. I’m mainly trying to find out about my zc tranny and if I can use it. Yes I was also told that any d series manual tranny will fit any d series engine. But I also read somewhere that it may have different type of axles? Help please lol
Thanks!
 

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First of all, where did you find any of this information? Knowing your source will help determine if it is poor or good


ZC=JDM

Find the label or ID tag that is mounted on every Honda transmission.

If removed or knocked off somehow, you will have to open the transmission up to get more information, such as counting gear teeth.

For axles, the ZC transmissions with LSD should have an intermediate setup, where each axle is identical length. 99.9999999% of the american cars do not have a motor with the bolt holes to mount an intermediate.

For this reason, most ZC LSD owners either go DIY style and make their setup work, or they swap to traditional short/long axles and deal with the additional torque steer that brings.

Measure the outer snout of the axles to see if you need to swap to ITR hubs
 

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Discussion Starter #3 (Edited by Moderator)
First of all, where did you find any of this information? Knowing your source will help determine if it is poor or good


ZC=JDM

Find the label or ID tag that is mounted on every Honda transmission.

If removed or knocked off somehow, you will have to open the transmission up to get more information, such as counting gear teeth.

For axles, the ZC transmissions with LSD should have an intermediate setup, where each axle is identical length. 99.9999999% of the american cars do not have a motor with the bolt holes to mount an intermediate.

For this reason, most ZC LSD owners either go DIY style and make their setup work, or they swap to traditional short/long axles and deal with the additional torque steer that brings.

Measure the outer snout of the axles to see if you need to swap to ITR hubs
Awesome thank you so much for the reply! First thing in the morning I will go out there to look for the stamp. The car the previous owner put this in had the original hub assemblies so not sure what they did but I will check the transmission to make sure. Again thank you for the help

The tranny was attached to a d15z1 I pulled the tranny off of the block myself so maybe they did some axle work to make it work?? Possible??
 

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'91 CRX DX, D15B (D15Z7), DX L3
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99.9999999% of the american cars do not have a motor with the bolt holes to mount an intermediate.
The 4th gen AWD Civic wagon had an intermediate shaft setup with D16A6 engine. I'm 99.9999999% certain that all US market D16A6 engines (Civic Si, EX, AWD, CRX Si) had the bracing and holes for an intermediate shaft. I seem to recall finding the same bracing on my D16Z6 before I sold it. I suspect that most, if not all D16s have the bracing and bolt holes, though possibly not threaded.
For this reason, most ZC LSD owners either go DIY style and make their setup work, or they swap to traditional short/long axles and deal with the additional torque steer that brings.
The issue is finding an intermediate shaft. There should be one in the world for every ZC transmission, but scrap yards toss them when breaking down cars. Anybody looking for a replacement transmission already has the shaft.
The easy fix is to put a USDM differential in the ZC gearbox and use US unequal-length axles.
Measure the outer snout of the axles to see if you need to swap to ITR hubs
Wh... what? I admit my knowledge is centered on 2nd gen CRX hardware, but why the hell would you need type-R hubs? Maybe vanilla Integra if the outboard joints are different.
The tranny was attached to a d15z1 I pulled the tranny off of the block myself so maybe they did some axle work to make it work?? Possible??
Seems like an unlikely pairing. The Z1 is a VTEC-E engine - a lean burn fuel economy motor, similar to the HX's Y5. The ZC trans is geared more for performance, not the lower RPMs typical of a economy setup.

[edit]Oh hey, 7 months ago. Transmission Alley doesn't get much traffic, does it? -_-[/edit]
 

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89 EF 4wd sedan
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The issue is finding an intermediate shaft. There should be one in the world for every ZC transmission, but scrap yards toss them when breaking down cars. Anybody looking for a replacement transmission already has the shaft.
The easy fix is to put a USDM differential in the ZC gearbox and use US unequal-length axles.
Not only is finding a half shaft difficult, but the RT4WD shaft is shorter than the fwd one too, so it's not possible to just determine from pictures (has to be measured)

Wh... what? I admit my knowledge is centered on 2nd gen CRX hardware, but why the hell would you need type-R hubs? Maybe vanilla Integra if the outboard joints are different.
Outboard axle diameter is the same so you can keep standard hubs, inboard shaft diameter is the same as DA.
 
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