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Hey sorry if I sound like a noob or whatever this is my first post. Anyways I have a 1990 CRX with a JDM D15B and some kind of ZC transmission, that is all I am positive about because I just got the car, the drivers side axle popped out and had been loose for awhile, so I went and tried to put a new one together using a crx and integra axle, eventually I realized that the axle wasn’t the problem and I’m assuming that that side of the diff has gone bad or something because the inner joint clicks into the other side very well and stays there but on the drivers side I can hammer it in and then pull it back out by hand, so it has to be the differential right? And if so, can I replace the diff with a CRX SI diff instead so that I can use regular axles instead of ones rigged together
tl;dr - ZC differential bad? Can I replace with SI diff so I can use stock axles
When you compare the depth of axle insertion of the driver and passenger axles into the differential, does the driver axle fully insert into the differential?
When you compare the depth of axle insertion of the driver and passenger axles into the differential, does the driver axle fully insert into the differential?
yes they both go in all the way but when I put it in the passenger side it doesn’t have nearly as much play and it can’t be removed by hand
the ZC transmission is designed to be used with the ZC intermediate shaft on the driver's side - the differential doesn't have a groove inside for the set ring since it isn't needed with the intermediate shaft - you could swap a complete Si differential carrier (as long as it is one with 40mm bearings) into it using the ZC ring gear on the differential - you could then use stock Si/DX axles
just remember that the bolts attaching the ring gear to the differential are LEFT HAND thread
the ZC transmission is designed to be used with the ZC intermediate shaft on the driver's side - the differential doesn't have a groove inside for the set ring since it isn't needed with the intermediate shaft - you could swap a complete Si differential carrier (as long as it is one with 40mm bearings) into it using the ZC ring gear on the differential - you could then use stock Si/DX axles
just remember that the bolts attaching the ring gear to the differential are LEFT HAND thread
There’s a guy with an si tranny that grinds 3 and reverse, should I just pick up the tranny and take the differential carrier out or would it be easier just to buy one separate (transmission is 100$)
the ZC transmission is designed to be used with the ZC intermediate shaft on the driver's side - the differential doesn't have a groove inside for the set ring since it isn't needed with the intermediate shaft - you could swap a complete Si differential carrier (as long as it is one with 40mm bearings) into it using the ZC ring gear on the differential - you could then use stock Si/DX axles
just remember that the bolts attaching the ring gear to the differential are LEFT HAND thread
Are you saying that the OP installed a B-series transmission with a D-series engine?
There’s a guy with an si tranny that grinds 3 and reverse, should I just pick up the tranny and take the differential carrier out or would it be easier just to buy one separate (transmission is 100$)
it would be easier if you could find just an Si differential by itself, but that may be hard to do - tell the guy selling the Si transmission that with the problems it has, you would have to spend a bunch of money on it to fix it and offer him $50 for it - can't hurt to try
Are you saying that the OP installed a B-series transmission with a D-series engine?
not sure what you are asking? - the ZC transmission is a L3 transmission and uses an intermediate shaft and equal length Integra axles that have the larger splines on the inner ends - not the same as L3 transmissions for the other D-series cars
not sure what you are asking? - the ZC transmission is a L3 transmission and uses an intermediate shaft and equal length Integra axles that have the larger splines on the inner ends - not the same as L3 transmissions for the other D-series cars
I was aware that Honda B-series transmissions had intermediate shafts. I was not aware that some D-series also did.
it would be easier if you could find just an Si differential by itself, but that may be hard to do - tell the guy selling the Si transmission that with the problems it has, you would have to spend a bunch of money on it to fix it and offer him $50 for it - can't hurt to try
Would any SI/DX diff work in it or are there only specific ones that will work
Cade, you would have to use a set of calipers (or you could try eyeballing it with a ruler if you had to) to measure the outside diameter of the differential where the bearings press onto. This will be the same dimension as the inside diameter of the inner bearing race for the differential bearings. The Si transmission (and ZC transmission) will measure 40 mm (1.575 inch, or just over 1-9/16 inch), while the DX transmissions will measure 35 mm (1.377 inch, or almost exactly 1-3/8 inch).
Cade, you would have to use a set of calipers (or you could try eyeballing it with a ruler if you had to) to measure the outside diameter of the differential where the bearings press onto. This will be the same dimension as the inside diameter of the inner bearing race for the differential bearings. The Si transmission (and ZC transmission) will measure 40 mm (1.575 inch, or just over 1-9/16 inch), while the DX transmissions will measure 35 mm (1.377 inch, or almost exactly 1-3/8 inch).
okay thanks for the good information, I'll get that Si transmission today and get to work
D15B CRX Differential Issues
