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Old 10-08-2012, 11:26 PM   #176
A W
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Originally Posted by b4wantab View Post
Snow Drift is right for his needs or wants and has a point that more and more soft-roaders are running into. Go over to subaruoutback.org forums. I just picked up an OB so I have been spending time over there. There are plenty of people getting stuck as there are also plenty of people that don't. There are new OB's that can't back over a curb.

Either way, the days of rocking the car, spinning the wheels and getting unstuck are disappearing. The ActiveAWD system has different limits than the full-time AWD system which has different limits than the VTD system. You need to understand the limits and decide what is best for you. The current 4EAT Active system is different that the CVT Active system also.

Understand that when you have a clutch fully engaged you are not guaranteed rotation, you are guaranteed torque. There is a clutch after the CVT belt before the front differential and there is a clutch after the front differential that sends power to the rear drive-shaft. The system is very capable.

Sorry to go so OT, there is much more info in the drive-train forums.

Peace,

Greg
Some people need to understand that you have to stay on the gas so that the VDC has time to do what needs to be done. Most people, older generations specifically, have been taught if you're stuck, you shouldn't keep digging yourself into that hole. It seems counterintuitive to stay on the gas in that situation but, in some cases, you do have to stay on the gas. Just don't floor it.


Other times something needs to be repaired if it's not doing what all USDM Subarus (excluding the BRZ) should be capable of doing like the below:


This driver had to have a rear axle replaced because before the driver's side rear wheel wasn't moving at all. Now it is with the repair.
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Old 10-08-2012, 11:45 PM   #177
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The VDC on Subarus not only brakes the slipping wheel, it also reduces engine rpms which ultimately stalls the engine. Try driving through deep snow or even doing a donut in the snow with VDC on. Then turn it off. The car is much better with VDC off.
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Old 10-08-2012, 11:53 PM   #178
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Well not really a fair comparison as the automatic Legacy GT has the VTD system which uses a planetary gear set to have a 45/55 split vs the 90/10 Haldex system. I am surprised that the Haldex system had a better outcome than the Highlander and CR-V, as they are 90/10 also.

Just for informational purposes, everyone should be aware that 2005 Legacy GT with VTD has VDC. VTD is fine and all great but if you don't have VDC in there, you won't be able to do what that Legacy did in the video he posted. VDC (or TCS, I have never confirmed which one does) is the one that brakes the individual wheels so that power can be transferred to the other side. Or whatever technical jargon you want to use to describe brake an individual wheel so power can stop going to one side with the least resistance and be transferred to the other side where the traction actually is.

That Forester in the video he posted does NOT have VDC which is what allowed the Legacy to climb that ramp with only one wheel having traction. VDC became standard on all USDM Subaru's in 2009.

This video might help some other people understand. The main point of turning off VDC is to stop the system from cutting engine power (as described in the video by the speaker).


And in the first part of this video below, he stays on the gas up to the 0:26 mark. And that's what a lot of people don't do or they're scared to because they think they're digging themselves deeper into the hole they got themselves into. (Yes, I know he's speaking a different language. Just watch the wheels and listen to the engine.)


Last edited by A W; 10-08-2012 at 11:59 PM.
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Old 10-08-2012, 11:57 PM   #179
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Originally Posted by Snow Drift View Post
The VDC on Subarus not only brakes the slipping wheel, it also reduces engine rpms which ultimately stalls the engine. Try driving through deep snow or even doing a donut in the snow with VDC on. Then turn it off. The car is much better with VDC off.
For some situations, yes, you need to turn off the VDC. As I posted above in the first video, you can turn it off with the VDC button. It doesn't turn off VDC completely but just turns off the part that cuts engine power. And that's fine. That's where the driver has to know what they need on and what they don't need on. If they're going through the backwoods and it just rained, yeah, you don't want the VDC cutting engine power in those situations. When you're flooring it on an iced street because you're not used to feathering the throttle, you should leave VDC on. Or start from a stop in 2nd gear on the automatics. ;D
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Old 10-09-2012, 04:56 PM   #180
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Originally Posted by A W View Post
Just for informational purposes, everyone should be aware that 2005 Legacy GT with VTD has VDC. VTD is fine and all great but if you don't have VDC in there, you won't be able to do what that Legacy did in the video he posted. VDC (or TCS, I have never confirmed which one does) is the one that brakes the individual wheels so that power can be transferred to the other side.
The 2005 Legacy GT did NOT come with VDC, VDC was added one or two years later.
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Old 10-09-2012, 06:20 PM   #181
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Vehicle Dynamics Control (traction control) was only offered on the top-end Outback (LL Bean or 3.0R Limited) before 2007.

with the 2007 BL/BP refresh, VDC was added to more Legacy and Outback models.

Variable Torque Distribution AWD was equipped on any Legacy or Outback with the 5-speed Automatic transaxle, including the 2005-2006.

That is why I dislike acronyms. Too easy to confuse, especially when two of the letters are in common between VDC and VTD.
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Old 10-10-2012, 10:23 PM   #182
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The 2005 Legacy GT did NOT come with VDC, VDC was added one or two years later.
Yes, my mistake. I was oogling over a 2005 Legacy GT wagon video while writing my post. The video clearly states 2008, not 2005.
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Old 10-10-2012, 10:24 PM   #183
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Originally Posted by HipToBeSquare View Post
Vehicle Dynamics Control (traction control) was only offered on the top-end Outback (LL Bean or 3.0R Limited) before 2007.

with the 2007 BL/BP refresh, VDC was added to more Legacy and Outback models.

Variable Torque Distribution AWD was equipped on any Legacy or Outback with the 5-speed Automatic transaxle, including the 2005-2006.

That is why I dislike acronyms. Too easy to confuse, especially when two of the letters are in common between VDC and VTD.
What else would you call it then? Lol, giving average day customers the full names wouldn't matter most of the time since they would remember less than half of what technical terms you were using to explain the systems to them.
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Old 10-15-2012, 09:18 AM   #184
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Originally Posted by Snow Drift View Post
The system must have a default stand-still nominal amount.
I was just reading through these posts again and when I re-read this one, I thought of something and just had to reply with something I thought was funny.

I would believe the default at a standstill(not moving, right?) is 0/0.

Once it starts moving, it is constantly adjusting depending on the amount of throttle is given.
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Old 10-20-2012, 06:35 PM   #185
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Originally Posted by JustyWRC View Post
I was just reading through these posts again and when I re-read this one, I thought of something and just had to reply with something I thought was funny.

I would believe the default at a standstill(not moving, right?) is 0/0.

Once it starts moving, it is constantly adjusting depending on the amount of throttle is given.
Lame. Even Haldex cars have some 50/50 initial split from a standstill.
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Old 10-20-2012, 06:57 PM   #186
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Lame. Even Haldex cars have some 50/50 initial split from a standstill.

Semantics. You are saying "from" a standstill. Which would imply "moving".

AT standstill, there is no power being transmitted.
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Old 10-20-2012, 08:30 PM   #187
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Semantics. You are saying "from" a standstill. Which would imply "moving".

AT standstill, there is no power being transmitted.
I need a vacation...
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Old 10-20-2012, 10:15 PM   #188
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I need a vacation...

Sorry
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