Dave Waldo
Member
This is the centre diff
The rear diff should be able to be locked when the centre diff is in high range if the rear diff controller is independent and does not talk to, or is controlled by, the Porsche smarts so the factory ECU doesn't know the rear is locked or partially locked. I think the rear diff blocking untill after low range is selected is software.
Happy to be wrong here, it's all a bit of a guess so far.
The centre diff has the cam that does the selecting in the pics above, but I don't fully understand it yet. I'm doing a lot of guessing based on the images above but, like you, I'd like to control all the diffs before selecting low range.
It looks like. The motor can move the cam to start loading the clutch before it pushes to engage low range.
Guess 2. Turn the cam 360° and engage low range with variable slip on the clutch.
Wild Guess 3. Turn the cam further again and lock the drive shafts. I can't see how that happens.
It looks like it will need custom controller and a new cam to change this. A bit of a PITA but doable maybe. Have to see one I think.
Do you know if the diff motor and the centre diff motor are the same ?
The rear diff should be able to be locked when the centre diff is in high range if the rear diff controller is independent and does not talk to, or is controlled by, the Porsche smarts so the factory ECU doesn't know the rear is locked or partially locked. I think the rear diff blocking untill after low range is selected is software.
Happy to be wrong here, it's all a bit of a guess so far.
The centre diff has the cam that does the selecting in the pics above, but I don't fully understand it yet. I'm doing a lot of guessing based on the images above but, like you, I'd like to control all the diffs before selecting low range.
It looks like. The motor can move the cam to start loading the clutch before it pushes to engage low range.
Guess 2. Turn the cam 360° and engage low range with variable slip on the clutch.
Wild Guess 3. Turn the cam further again and lock the drive shafts. I can't see how that happens.
It looks like it will need custom controller and a new cam to change this. A bit of a PITA but doable maybe. Have to see one I think.
Do you know if the diff motor and the centre diff motor are the same ?
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