Last post on Jul 09, 2013 at 10:14 AM
You are in the SUVs
What is this discussion about?
Chevrolet Suburban, Jeep Grand Cherokee, Subaru Outback, Ford Explorer, Nissan Pathfinder, GMC Envoy, Performance Mods, Tires, Suspension, Transmission, Truck, SUV
#1431 of 1461 Re: WRX Saves a Ram [dcm61]
Jul 28, 2012 (6:42 am)
6 wheels driving, the 2 front on the subie + the 4WD RAM, will always provide more traction.....
Is that a WRX (no hood scoop) and is it the WRX with the "make-do" VC coupling.
#1432 of 1461 Re: WRX Saves a Ram [wwest]
Jul 30, 2012 (6:38 am)
One has excess traction, the other not enough.
The Subie happens to have enough excess traction to compensate for the other.
#1433 of 1461 2005 Outback AWD Failure
Aug 11, 2012 (7:39 pm)
I got stuck recently in the Sierras when I backed over a large angular piece of granite that dropped the right rear wheel into a hole. All the other wheels were firmly on the ground and the chassis did not high center. I thought the AWD in the 5-speed would pull me out with no problem. But all it did was spin the right rear wheel and burn up the clutch. I managed to get out by slipping the jack under the chassis in front of the right rear wheel and jacking up the car enough to put some rocks and large branches under the wheel and the floor matte over the rocks/branches and up the rock, and I finally got out. But I was very disappointed in the car. So, what gives? Thanks. LRV
#1434 of 1461 Re: 2005 Outback AWD Failure [larryv]
Aug 13, 2012 (9:28 am)
Subaru is not shy regarding marketing "AWD" systems that have VERY serious shortcomings. The current WRX, for instance, uses a completely non-functioning VC, Viscous Clutch, in order to tout "AWD" capability.
Sounds as if your's is one of the many F/awd systems out there in the market today that are really "ONE-WHEEL" drive systems. Totally open center differential, "AWD" mode only if all four tires have roughly EQUAL traction.
Most of those have a TC implemented "AWD" system, braking of "slipping" wheels to simulate traction accompanied INSTANTLY by full engine dethrottling...not very helpful in the situation you describe.
Turn off TC = ONE-WHEEL drive.
#1435 of 1461 Re: 2005 Outback AWD Failure [larryv]
Aug 13, 2012 (11:59 am)
Did you turn off the traction control? I think that would have helped. Subaru says to turn it off in deep snow and mud. It certainly would have helped your clutch.
#1436 of 1461 Re: 2005 Outback AWD Failure [rsholland]
Aug 13, 2012 (7:04 pm)
Since turning off TC results in the car reverting to a simple ONE-WHEEL drive he got exactly the results one would expect.
With TC on the engine dethrottling would have been so severe the engine torque wasn't enough to pull that wheel over the "hump".
TC off functionality is pretty much restricted to "feathering" the throttling right up to, but not beyond, the point of loss of traction. Wheelspin, rocking the car back and forth, to get unstuck, can also be used constructively.
#1437 of 1461 Re: 2005 Outback AWD Failure [rsholland]
Aug 14, 2012 (6:00 am)
Did you turn off the traction control?
Wake up before you post, Bob ... 2005 Outback 2.5L does not have traction control.
#1438 of 1461 Re: 2005 Outback AWD Failure [dcm61]
Aug 14, 2012 (7:01 am)
What's the little yellow light that shows a car skidding on the instrument cluster? I can turn that off in my car, and you're saying that can't be turned off in the Legacy 2.5?
#1439 of 1461 Re: 2005 Outback AWD Failure [rsholland]
Aug 14, 2012 (7:53 am)
VDC wasn't available on the 2.5L models until 2008 as an option, then standard in 2009.
Even so, the car should have had traction in the front axle unless the center differential had gone out. It's unusual that he would have power to the rear axle under that circumstance, though, as typically it is the rear axle that would stop working as opposed to the front axle. In 2007, 08, and 09, the rear axles on the Outback were limited slip, but they were open prior to (and after) that, so under limited traction conditions they are generally 2wd (one on each axle).
I managed to get my '96 Outback stuck more than a few times in deep snow by taking too much weight off the wheels, and it would always default to spinning the left front and right rear tires.
#1440 of 1461 Re: 2005 Outback AWD Failure [dcm61]
Aug 14, 2012 (7:56 am)
"..does not have..."
That would be strange indeed. Even as far back as 2001 it ws well understood industry wide that TC could prevent a LOT of loss of control accidents rising from the use of to much engine torque applied to the drive wheels.
Prior to that period TC was found mostly only on "pure" FWD vehicles, non-AWD versions.
That was one of the aspects facilitated by DBW, the engine could be dethrottled without compromising the catalytic converter.