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Old 12-12-2006, 12:12 AM   #1
Warren N.CA
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Join Date: Dec 2006
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2006 Impreza WRX LTD
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Default Odd problem 06 WRX clutch- not shudder

When entering a freeway, murging with 75mph traffic, if I wind-out first, throw a reasonably fast shift to second, then let out the clutch pretty fast (like I would on my older BMWs), a LOUD BANG comes from the driveline, and the RPMs fall down into a soggy heap, and the speed justs creeps up from 2K, until it starts boosting again at 3K. A review I read said you just cant shift this car very fast, you just need to take a little time. Please share your thoughts with me, on this one.
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Old 12-12-2006, 12:22 AM   #2
AWD>FWD
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You gotta be gentile with it!
That is your rear differential just bangin' around back there. Let the clutch out slower next time.
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Old 12-12-2006, 12:35 AM   #3
Impreza01
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Quote:
Originally Posted by Warren N.CA View Post
When entering a freeway, murging with 75mph traffic, if I wind-out first, throw a reasonably fast shift to second, then let out the clutch pretty fast (like I would on my older BMWs), a LOUD BANG comes from the driveline, and the RPMs fall down into a soggy heap, and the speed justs creeps up from 2K, until it starts boosting again at 3K. A review I read said you just cant shift this car very fast, you just need to take a little time. Please share your thoughts with me, on this one.
From what it sounds like, you're not adding gas (sorry if it sounds offensive, but it seems you need to improve your stickshift techniques). If your rpms just drop, you're not adding enough gas. There are other issues at play too. You're driving an AWD car, so any extra power that would cause a RWD or FWD to chirp would cause a drivetrain whiplash. Another issue is that a new clutch might be much more grabbier than you're use to. Lastly, that loud bang is coming from your LSD.

It is definitely possible to shift a WRX very quickly, but one has to be meticulous about it.
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Old 12-12-2006, 01:29 AM   #4
Warren N.CA
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Default Well that's interesting- the LSD putting the nix on things...

I think, from what all of you folks say, letting out the clutch a bit slower is probably the ticket. And this is a tough shot, because I'm accustomed to the BMW behavior. But I have had a similar problem in the past with my '89 BMW 535i- the tires just had TOO MUCH traction, and it caused severe axle hop. But different tires cured this.

Mostly, with my 06 WRX, it doesn't happen. Last time it did, I needed to enter 75mph traffic with NO acceleration lane. So I was pressed to get up to speed fast, and just "automatically" reverted to my BMW technique.

Mostly, I do fine with the WRX tranny & clutch, but every time I get back into the Bimmer with the Getrag tranny, I notice the improvement. Regardless, the BMW will not come close to the WRX acceleration, clutch problems or not. Also, this WRX is a reliable, trouble free car at about 7.5K.

Last edited by Warren N.CA; 12-12-2006 at 01:35 AM.
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Old 12-12-2006, 01:55 AM   #5
Warren N.CA
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Default Well, dude, my "old BMW inspired technique" is to...

floor the accelerator pedal, as the clutch is being released. But it somehow, someway works out badly for me, in the WRX (in fairness, ONLY now & then). From replies like yours, my focus will be on letting out the clutch more slowly, and/or perhaps allowing the engine to spool up to say, at least 3K, prior to release of the clutch, under aggressive conditions.
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Old 12-12-2006, 10:18 AM   #6
DiscoGsus
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If you are winding out 1st, then your RPM's should never drop to 3K, let alone 2K.
You should be able to stay in boost the entire time. Especially with the 2.5L.
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Old 12-12-2006, 03:28 PM   #7
Warren N.CA
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2006 Impreza WRX LTD
Black

Default It's after the BANG that the RPM's drop...

Or, perhaps when the violent BANG occurs, I instinctively let up. Hopefully I can train myself to let the clutch out a bit more gently. Problem is I still drive the BMW about half the time.
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Old 12-12-2006, 08:21 PM   #8
Hondaslayer
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That BANG is your drivetrain begging you to be more gentle.

Basically you are letting the clutch up too fast, you're not sidestepping it? are you?
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