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Old 06-08-2009, 01:35 AM   #1
@NT
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Default 2009 WRX clicking noise after coilovers

So I just installed my coilovers Friday night. The car looks great and I haven't had any issues rubbing. However, I went get some frozen yogurt tonight and had my first experience with a steep driveway.

I took it at an angle to avoid scraping, but I heard a weird clicking noise. I know the car was teeter-tottering at one point, could it be the diff? CV's? Could it be from one wheel spinning freely as the other wheels are under load? Has anyone had any experience with this?

From what I've found searching, people have had this problem when turning to full lock. I don't hear this noise when turning full lock, only when I was going up and down that driveway. Is this normal or should I be concerned? The clicking went away right after I got off the driveway.
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Old 09-16-2009, 11:13 PM   #2
WRrexu
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VDC? if a tire looses traction ( lifts off ground ) it will engauge the electronic LSD and it makes a clicking noise . ive experienced this in other cars . never subis. just a thought....
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Old 09-16-2009, 11:28 PM   #3
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^^^ I thought VDC only applied the brakes to limit wheel slip and that the diffs are open, not electronic LSD?
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Old 09-16-2009, 11:33 PM   #4
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oh no . it acts as LSD . limiting wheelspin is when traction control is on . when the tires spin it just throttles down ( because of drive by wire it can control it )
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Old 09-16-2009, 11:39 PM   #5
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Quote:
Originally Posted by WRrexu View Post
oh no . it acts as LSD . limiting wheelspin is when traction control is on . when the tires spin it just throttles down ( because of drive by wire it can control it )
VDC does not act like an LSD in that LSD's control power distribution to the wheels, they don't limit it like VDC does.
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Old 09-17-2009, 12:14 AM   #6
WRrexu
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Originally Posted by tuskenraider View Post
VDC does not act like an LSD in that LSD's control power distribution to the wheels, they don't limit it like VDC does.
explain drifting with open differentials when all it does is limit wheelspin then .

i wanna hear this
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Old 09-17-2009, 11:36 AM   #7
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Less wheelspin with open diffs, yes, I'm sure it limits wheelspin to one wheel, don't see the correlation. VDC is a stability contol system overall, not an ELSD.
http://www.scoobymods.com/attachment...0&d=1084717289
http://www.scoobymods.com/attachment...3&d=1084717315

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Old 09-17-2009, 02:28 PM   #8
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Applying braking force to a spinning wheel with an open diff transfers the power to the other wheel... I don't know enough about VDC to comment on whether this is what's happening though.. FWIW
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Old 09-17-2009, 04:19 PM   #9
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Quote:
Originally Posted by WRrexu View Post
explain drifting with open differentials when all it does is limit wheelspin then .

Er, i can drift my car quite easily. I don't have VDC or any LSD's worth mentioning.
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Old 09-17-2009, 06:55 PM   #10
tuskenraider
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Applying braking force to a spinning wheel with an open diff transfers the power to the other wheel... I don't know enough about VDC to comment on whether this is what's happening though.. FWIW
I autox and have forgotten to shut the VDC off many times......it doesn't transfer squat, even if that's the intention.
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Old 09-17-2009, 08:53 PM   #11
MNGman
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Back to the clicking... did you install swaybars with endlinks? Friend had same issue with endlinks binding a touch after install of coilovers and a slightly lowered ride height. adjust endlinks clicking went away.
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Old 09-17-2009, 10:37 PM   #12
joshuaj
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I track my 09 WRX quite a bit and the VDC is poo on the track. I put a piece of white tape on my cluster that says VDC to remind me to shut it off . Anyway like I said I really don't know enough about VDC to say if it should transfer power in that manner or not. Just saying that you can transfer torque to the other side of an open diff using brake control on the spinning wheel..

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I autox and have forgotten to shut the VDC off many times......it doesn't transfer squat, even if that's the intention.
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