Hello. I just swapped the 3.7 diff from a g37 6mt into my 04 g35 5at. (Full pumpkin)
The diff I currently had was an open diff I believe since it wasn't a sport trim which has the lsd to my knowledge.
The flanges matched and it was a direct plug and play and perfect fit, but the issue is with either my abs(?) or vehicle speed sensor(?). My car currently has one plug for the pumpkin whereas the new diff has two plugs that are made for each sensor I'm assuming? I have a friend who also did a full pumpkin swap but his car already had lsd(2 plugs) so he faced no problems.
This is all according to my mechanic and some research and I'm so confused. Any input would be appreciated. Thanks.

So all in all. I swapped a 3.7 vlsd pumpkin into my 3.3 open diff and the vehicle speed sensors don't seem to be compatible.

I don't know much about cars so please excuse my ignorance.

 

you need to reuse your old speed sensors from your 04 G. thats it.

 

So I did reuse the speed sensors and it takes care of the extra plug problem. The vdc slip light is on and the car is basically in limp mode unless I turn the vdc off.

 

Could be one of the sensors was damaged during the exchange.

 

that seems likely, or it is not aligned correctly with the teeth on the axles. I have a 3.7 on my 03 G and it works fine

 

Alright. We will try to recheck the alignment and the sensors. And maybe the tone rings.

Will keep you guys posted. Thanks for your replies.

 

I'm under the impression that the automatic Z has a speed sensor in the transmission and the ECU compares the wheel speed with the transmission speed. It will also cause cruise control not to work, this is why I didn't change the diff gear ratio on my car while I was in there.

 

The half stubs also need to be swapped over, different number of teeth.

 

you dont need to swap the half stubs over... in fact you cant as the G37 stubs are the extra short ones and G older stubs wont push in all the way.

 

V35 is probably correct, I swapped mine over due to the speedo discrepancy but I have a 6mt 350z.

 

I was told the 2009 differential I swapped in has 47 teeth, whereas my 2004 differential has 46.

 

Would I have to swap the stub shafts as well??