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Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / September 2006Traction control in an AWD when all 4 wheels loose traction
Hi everbody! How does traction control in an AWD detect if all 4 wheels lost traction at the same time? Like on ice or sand for example? (In my situation there is *no* center diff. in the AWD) Thanks, Chris. > Hi everbody! > How does traction control in an AWD detect if all 4 wheels lost > traction at the same time? Like on ice or sand for example? (In my > situation there is *no* center diff. in the AWD) > > Thanks, Chris. I would imagine it would still be looking for differences in rotational speed. AWS (All Wheel Slip) would occur. Equal torque being delivered to all wheels. > Hi everbody! > How does traction control in an AWD detect if all 4 wheels lost > traction at the same time? Like on ice or sand for example? (In my > situation there is *no* center diff. in the AWD) > > Thanks, Chris. I would suspect you are just as screwed as any vehicle in that situation if stopping or if you are accelerating you 'should' see 4 rooster tails. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pictures.html?id=2115147590 (More Off Road album links at bottom of the view page) > Hi everbody! > How does traction control in an AWD detect if all 4 wheels lost > traction at the same time? Like on ice or sand for example? (In my > situation there is *no* center diff. in the AWD) > > Thanks, Chris. > I would suspect you are just as screwed as any vehicle in that situation > if stopping or if you are accelerating you 'should' see 4 rooster tails. Which is why every winter I watch all kinds of luxury SUVS go plummeting to the ditch because their owner drank the "It has AWD, Traction Control, Stability Control and Anti-lock Brakes, so I can still drive like a jackass and ignore that we're in a blizzard" Kool-Aid. </soapbox> > > I would suspect you are just as screwed as any vehicle in that situation > > if stopping or if you are accelerating you 'should' see 4 rooster tails. [quoted text clipped - 6 lines] > > </soapbox> The ones with a locking center diff can be nasty if you don't know how to drive them. If in 2 wheel drive and you skid the front wheels by braking, you just lose steering and go straight until you let up on the brake. With a 'part time' 4x4 that locks the center diff, when you lock the front wheels up, the damn back ones lock up too and you go sideways faster than you can blink. Same for ice bottoms and all wheel drive. When the tires all lose it (traction) you are screwed. If you use the gears right to decelerate like both of my owners manuals state, you can keep control better, but touch the brakes and wham off you go. It is crazy the number of 'AWD' vehicles that pass us in snowstorms when I am running locked up in 4x4 at about the maximum speed for control with 'really' good winter traction on my BFG 33x9.5" muds. Every winter trip at least one of these fools is found up ahead in the ditch. Last New Years on our way winter camping in a snowstorm there were 5 or 6 of them! It was nuts. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pictures.html?id=2115147590 (More Off Road album links at bottom of the view page) > It is crazy the number of 'AWD' vehicles that pass us in snowstorms when > I am running locked up in 4x4 at about the maximum speed for control > with 'really' good winter traction on my BFG 33x9.5" muds. Every winter > trip at least one of these fools is found up ahead in the ditch. Last > New Years on our way winter camping in a snowstorm there were 5 or 6 of > them! It was nuts. Absolutely. I find that my 2WD Ranger does incredibly well in the snow as long as I keep my wits about me and drive for the conditions. It's the other mofos on the road that scare the hell out of me. I'm not a native here- I came from a no-snow state. I hate to say it but in the few years I've been here I really feel like I can outdrive the locals in the snow. I don't want to perpetuate the stereotype, but it *always* seems to be the 90lb hawt stay-at-home-coz-I-married-rich-soccer mom types in the Excursions, Suburbans and Navigators that go blowing by at 70mph with no regard to anyone else's safety. Oh well. For what it is worth, my next car is mostly likely to be an AWD Subaru Wagon. I'll miss my little Ranger though. |
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