I have a 2005 Cayenne S WITHOUT PASM, 18" all season tires on the turbo look tires. Im used to my 4runner where the settings were 2WD, 4WH, and 4WL. The CS is fulltime 4WD and the switch allows me 2 other options. Can anyone explain to me? Regards HAM
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You will not need to change the settings at all just remember that your in a heavy vehicle and should take yr time and get used to the stopping distances.
Get in a parking lot and practice flooring it and hard braking to get the feel of it.
Have fun but be carefull
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But really, the only time you would use them is if you were climbing hills or going over very rough terrain where large holes and rocks are an issue.
In deep snow switch off PSM, this will allow the wheels to keep moving so you avoid getting stuck, same with sand, it does not reduce the systems effectiveness in protecting itself and will kick back in if it thinks your being silly.
Be nice. The previous poster answered your question.
There is no "2wd" setting. With your Pepper, the settings are Normal (4WD), Low Range (first setting), Locked center differential (2nd), then adding a locked rear differential (3rd). These functions allow the Cayenne it's incredible off road capabilities. The Owner's Manual gives an excellent writeup (in good English, no less) and description of each function.
Hope that helps.
I might have ome input here... I have a 04' CT which I have been driving for about two weeks. I used to have an 01' S4. We just had three pretty big snowstorms in about two weeks up here in Toronto. And I was driving my CT in all three. Here are my observations:
- overall, the S4 with Quattro (and even lowered with coilovers) feels much more sure-footed in the snow. Anyone else who has had Quattro feels the same?
- I was caught in some pretty heavy stuff one night. Basically about a foot of snow had fallen and none of the roads were plowed yet. So I used that opportunity to test out its snow performance. In reg. hi-range mode, the truck handles ok but I did get some tire spin from the rear (I have never had any tire spin from the S4 in the 4yrs of ownership. In fact, one year I was late getting my snow tires on and I had to drive thru a snowstorm in my 18" Proxies T1-S and still it handled great and no wheel spin!)
Anyway, I then tried low-range mode where basically the gearing is reduced. Obviously, the whole truck "feels" a lot slower but the lower gearing offers much better engine braking. However, the wheel spin from the rear was still there and when that happens, the tail-end would "waggle" a bit.
Next, I tried locking the centre-diff. Now the truck is even slower (obviously) but the truck tracked much better. No wheel spin and no waggle! If only we were able to lock the centre diff in high-range mode!
So I'd say I do miss Quattro but the Cayenne is more than capable in the snow.
The single best thing you can do is to run a real snow tire, not what came on the car, if you need regular snow traction. Otherwise do not fiddle with the console switch. Porsche Stability Management (PSM) is all you should ever need in an on road situation. As mentioned, if you get into a very low speed, deep snow (over one foot) locking the center diff may be a good idea. Generally though, the truck is factory programmed to keep you out of trouble. I just run 235/60-18 Scorpian AT's and let it rip. We get more than our fair share of snow and I have never felt the need to change any settings.
bullbear -So far I haven't had wheel slip in the snow in my CT. I would expect some slipage from most AWD when 1st taking off from a stopped position. Usually the CD divides the power between frt & rear but not side to side so I would think if you had rear wheel slip, you would continue to get it. We still have snow down today so I will go out and play a bit and see if I notice any slip. So far I'm still enjoying my CT
On full snows (Scorpion Ice & Snows) I can get the CT to spin the wheels if I romp on it, but I'm not too suprised. The thing has gobs of HP and torque. If you work at it, you can get wheel slip on dry pavement with summer tires.
I think the variable you're feeling is the level of slip that PSM allows before it cuts in. PSM's limits are a tad higher than the ones on other AWD's I've driven and I think that's a good thing. Gives the control back to the driver.
I bet that if you turned off stability control on your S4 (is that possible?) you might see similar results to your Cay with PSM off.
The great thing about Quattro is it's a purely mechanical system, so it starts responding to any slipping before you are even aware of it. With the electronic AWD systems, I believe most of them are programmed to wait until some slip is occurring before they lock things up.
The drawback to Quattro is it tends to be heavier than electronic systems and there is a resulting penalty in fuel mileage.
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