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Old 12-06-2018, 01:20 AM   #1
BugeyeZo
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Default Dccd whine when locked ??

So I was cruising down the highway while it was raining and I turned my manual dccd controller to full lock to avoid some hydroplaning. Well the moment I locked it I started hearing a whine that is consistent with my speed . Once I flipped it back to open the whining went away. Not sure if this is normal? Or signs of the center diff wearing out. I have poly engine and trans mounts so the whine is pretty audible. Drivetrain is from a 2004 sti with all included parts.
Anyone have any ideas ? Thank you
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Old 12-06-2018, 01:39 AM   #2
jamal
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A locked diff won't keep you from hydroplaning. And it's generally not good to lock those up on pavement. Even though all the tires are the same size, there are still slight differences in rolling diameter and rolling resistance and that is probably the reason for the noise.
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Old 12-06-2018, 02:05 AM   #3
BugeyeZo
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I know itís not ideal I just figured itís better then open in heavy rain. My adjustment knob broke so I installed a switch so I only have open and full lock at the moment.
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Old 12-06-2018, 09:24 AM   #4
SirBrass
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You hydroplane because your tire treads can't channel enough water away to maintain contact with the road surface. It has nothing to do with your diff settings.
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Old 12-06-2018, 02:59 PM   #5
BugeyeZo
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I know how hydroplaning works. But thanks anyways. Iím not saying itís gonna stop it from hydroplaning I just figured Iíd give it a try.
Hydroplaning isnít the focus here itís the whine Iím worried about not hydroplaning.
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