I piled up my front diff on my X2 last fall. I finally got a hold of a new diff on the internet. It was shipped to me and I discovered it is basically the same, except it has the ADC system on it. The wiring harness on the old diff is the same but now it has two extra pins. My question is can I use this diff on my 06?

 

In theory you should be able to but don't take my word for it. I put a ADC disable switch on my 2007 and now it acts like any sportsman without when switched off. The two extra wires you are missing is nothing more than a power supply and ground from the ECM to engage the ADC. With that said, you might be able to hook up the ADC but not sure, I think the ADC came out in 2007 which would probably mean your ECM wouldn't have the pins for it. Also, if it will work for you, be sure to use the (demand drive plus) in that particular front drive unit.