I have a 99 si with the d16y8 and an auto tranny and it has been giving me grief and I found a transmission but it’s from a 2000 sedan with the d16y7 and I’m wandering if I can use that transmission

 

If you're in a state that requires inspection it won't work. You'll throw a CEL light for improper gear or some ****.

 

Canada Civic Si?

An auto P2P ECU must accompany the auto trans.

 

Yes a Canadian civic si. What is that ecu? Is that aftermarket or come factory on the car

 

OEM OBD2B ECU for D16Y8 auto

 

Well my car has that as it’s a factory d16y8 auto car, I just want to run the trans from the d16y7 as mine is giving me shifting problems and I keep getting the tcc lock up solenoid circuit malfunction code and I tested the solenoid and it checks off all the boxes so I’m guessing my tranny is on its way out

 

Oh, I see. The Civic EX and Civic CX/DX auto transmissions have different gearing ratios, so Tony is probably correct in saying that your suggested transmission swap will throw one or more transmission codes.

 

I'm never correct though

 

It should be plug and play if its a Auto.

 

Nah, the autotragic between the y8 and y7 are different. It'll work but you'll get a CEL.

 

Ahh Damn autos, Guess it will shift weird and you have to swap a few harnesses,

https://honda-tech.com/forums/honda-...ngine-3068023/

OP do a manual conversion and send it! jk are you having a hard time sourcing a good condition Y7 trans?

 

As Tony mentioned, the swap will additionally result in a transmission CEL code that would prevent passing inspection in some states.

 

Indeed, the link I shared shows its a P0715 code,

 

Did you notice the difference(s) between the transmission swap at your link and the one in this thread?

94EG8 claimed that pairing a Y8 auto transmission with a Y7 engine and ECU would throw P0715. He also stated that the converse swap (pairing a Y7 auto transmission with a Y8 engine and ECU) would not throw a CEL code.

If correct, this is actually good news for the OP.

 

Yes OP might be in luck then and it should be plug and play if 94EG8 is correct!

 

thats interesting, I used the y8 ecu with the y7 auto and I got a cel.

 

Maybe 94EG8 was wrong. Would be interesting for OP to report whether his swap also throws the trans code.

We have a real mystery here.

 

eh, don't care...