jdm svx trans, will it work?
 

I have a '92 SVX, the tranny died and i found a JDM svx trans and got it. what will i need to change to make it work. its all bolted in and ready to go but i haven't started the engine yet. i just read that the jdm wont work because of the tcm. what is different? can it be modified?

thanks
Steve

Re: jdm svx trans, will it work?
 

I think the gear ratios are differant also but don't quote me on that.

Re: jdm svx trans, will it work?
 

depends, does the back end of the transmission look any different than the old one?

Tom

Re: jdm svx trans, will it work?
 

it needs the jdm tcu as well as it being designed for AWS

Re: jdm svx trans, will it work?
 

Yes you will need a 3.7:1 rear diff, and swap the C solenoid for the US one. Then use the US TCU.

Harvey.

Re: jdm svx trans, will it work?
 

Here are some pics of the trannys, the one on the jack is the JDM, the plywood is the US one.

Attachment 12346

Attachment 12347

Attachment 12348

Re: jdm svx trans, will it work?
 

Should have kept my mouth shut ;)

Re: jdm svx trans, will it work?
 

where can i find the 3.7:1 gears?

Re: jdm svx trans, will it work?
 

JDM SVX only...

Re: jdm svx trans, will it work?
 

Not Correct.....the XT6 automatics came with 3.70's, and use the same rear diff housing as the SVX, so you'd just need to swap in the SVX LSD unit into one.....and they can be bought cheap on USMB

Re: jdm svx trans, will it work?
 

My bad, did not realize that, Huck...

Re: jdm svx trans, will it work?
 

Also the 07+ wrx uses a 3.70 rear diff in the same 5bolt sideplate r160 as us. You still need to swap the guts but thats about it

Tom

Re: jdm svx trans, will it work?
 

Steve, please note.

You must retain the JDM normally open solenoid as well as the JDM TCU. The US TCU might operate after a fashion, but the programming is unlikely to suite the centre diff. set up.

Fitting a US normally closed solenoid will reverse operation in respect of front rear bias. The use of different solenoids, enables the same on/off sequence for the pulse width modulation signal, to be used for both types of transmission. There is no doubt that this is sensible economical design, resulting to several areas of reduced cost, as well as a logical common set up.

Re: jdm svx trans, will it work?
 

I have an update,
everything is installed, tranny, rear gears with SVX LSD.
I drove the car down the road and all was well at low speed, when i needed to turn it felt strange, kinda like a 4x4 truck in 4wd on pavement. So i belive the center diff is locked or something.
I dont really know how the center diff is set up in the JDM.
I am using a US Spec TCU.

other than that it accelerates quickly and shifts nicely.

Anyone have input?
Think the JDM TCU will fix it?

Thanks
Steve

Re: jdm svx trans, will it work?
 

yes

The JDM trans' center diff works on an opposite method so when the TCU commands FWD the trans will apply AWD. You will need the JDM TCU. Whether it will plug right in is the only thing I am not sure of

Tom