# question for subie guys..

**URL:** <https://forums.speedlife.net/t/question-for-subie-guys/248697>\
**Category:** Shift518 Automotive\
**Created:** [November 29, 2009, 8:54pm UTC](https://forums.speedlife.net/t/question-for-subie-guys/248697 "2009-11-29T20:54:52Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![99FRC](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/99frc/32/6335_2.png) [@99FRC](https://forums.speedlife.net/u/99FRC)\
**Post date:** [November 30, 2009, 12:52pm UTC](https://forums.speedlife.net/t/question-for-subie-guys/248697/7 "2009-11-30T12:52:27Z")

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> [@Any wine drinkers here?](https://forums.speedlife.net/t/any-wine-drinkers-here/26524/15):
>
> 06+ have a center diff with a permanent mechanical engagement so even when power is fully dumped to the DCCD to the system isn’t completely unlocked, hence no fuse.
> 
> up to '04, the DCCD could be 100% unlocked by pulling power to the DCCD(that fuse activates a relay which open the DCCD main wiring, thus open circuit). Main reason why putting a six speed into a non DCCD car results in FWD unless you install an aftermarket DCCD controller, or send a 12volt 10amp load to the DCCD.

Ok, I understand the why. But now I would like to know how that works mechanically. If the entire AWD system is connected mechanically, how does a simple circuit allow you to stop sending power to the rear wheels?

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