My Setup:

1991 B16 sir Crx cable to hydro.
Obdo to obd1.


I'm due for a new transmission as my old b16a was damaged. My mechanic is installing one i ordered for my B16 sir CRX. The issue is the importer sent me a b16b transmission on accident that has a different speed sensor configuration. From what I understand they normally don't. I'm running my old cluster. I was going to simply use the d-series speed sensor as they are normally interchangeable. Except for this one! Literally the teeth and diameter of the gear and shaft are different. Looks similar to this: JDM Y1 & LS Speed Sensor Question (Searched) - Generation 2 Integra Club Forum ....

I can't find info anywhere as this is apparently a rare occurrence...

Is there a way to interchange this and continue using my old original CRX cluster?

Here is a photo of what i'm facing

The shorter rod and gear towards the bottom of the photo (black plastic gear) is wider in diameter than the one that came in the b16b lsd transmission (gold metal gear)
:

 

Go talk to a machine shop, and see about getting the Gear for the B16B trans sensor pressed off it's shaft, drilled out, and re-installed on the SiR shaft. That should be all you have to do.
Otherwise, it is a case of needing a non-cable cluster. I am about to do this on my CRX, as I am about to put a complete B16B swap in.