So I just swap out my dx motor to a si(d16z6). I bought the motor with the tranny with it. I started it up and I hear some knocking or grinding from the transmission when it's in neutral but when you step on the clucth the noise goes away. So I'm pretty it's the pilot bearing bearing bad hopefully, so if I was to buy a used or rebuild tranny how would I know I that tranny that I'm going to buy is a si tranny? I know that on the tranny there is a serial number on there but what am I looking for on that serial number to make sure that is a si tranny for a 92-95 Honda civic si?

 

im having the same problems with my transmission i have the same transmission and motor let me know what you find out i think mine was low on tranny fluid

 

input shaft bearing is bad in the tranny

 

Theres a round stamp on the passenger's side of the tranny near the back by the fill plug, it will say one of 2 things:

A000 -> CX/VX/DX/LX
B000 -> EX/Si/HX

Note that S20 transmissions are '92 - '95 (there was no HX offered for those years so if you're guarenteed to be getting an EX/Si tranny. the S40 transmissions are '96 - '00 and you run the risk of getting an HX tranny.

Btw, if your transmission shifts fine and just makes noise just replace whatever bearing(s) happen to be bad, they aren't that hard to change and more often than not the transmission you buy will have the same issue.

 

+ 1 for input shaft bearing, this can be caused by pilot bearing failure so don't be surprised if it toast too

 

ISB is a very comon failure in these trans it is very easy to change once you have the trans out of the car.

 

sounds like i have this same problem......is there a DIY to change input shaft bearing?

 

Only about a dozen of them out there.

I would definitely recommend getting a service manual for your car though. The best DIY I've ever read was in my service manual.

 

could be a your throwout bearing going bad as well. my friend has the same problem in his jeep but when he presses in the clutch it goes away