Fugaziiv

Saw what looked to be an 05 GRP Sedan with tints in the Woodman's parking lot in Janesville WI Sunday afternoon. Young dood was driving away, the car was making some unsettling noises...

Last I checked, this is the ONLY way to drive in the snow.

I find this thread interesting... Coming from a powersports background I'll share my .02 on this one. Polaris Sportsman ATVs after 04.5 all have electronic engaging front diffs, and when being ridden on glare ice will display almost this exact behavior in the front end. What is happening on the ATVs is that the front diff is speed and torque sensing; while in 4x4 mode when the front wheels are moving at the same speed as the rears, the diff remains open so that the rider feels no change in ride quality. As soon as one of the front wheels falls a 1/10 of a rotation behind the speed of the rear wheels the front diff will send power to that side and start feeling for any back torque (traction) on that wheel. If it doesn't feel any back torque it will shoot power to the opposite side and look for traction there. If there isn't enough traction on that wheel, the diff becomes confused and will continually shift power between the two front wheels looking for traction causing a really unsettling 'wiggle' until one of the fronts once again finds traction. On an atv this doesn't occur in the rear because the real is always a locked diff. The interesting thing is that the front diff on the Polaris works pretty much flawlessly in all other conditions. (well providing it isn't broken, it is a Polaris) I know this isn't too very scientific, but I wonder if something similar is happening here...