Originally posted by bertwert Ah yes, that's quite a sensible combo (RWD normally, then 4WD as needed - that's how we use the truck), I was talking if you had 2WD only where FWD is generally better in the ice and snow, as I'm sure you've worked out by now
Odd thing you mention this. I was driving the '20 Chevy pickup 4WD, with RWD normally yesterday and today. There is no automaic 4WD, I had to manually switch into different modes.
My regular ride is a '20 Chevy Traverse SUV, which is a fair size. I think 204 or so inches in length, 121.9 inch wheelbase, 4550 lbs. and a payload of 1612 pounds. It has FWD (2WD) normally. But if I want AWD. or something something they call off road AWD (certainly will never take this off road) which someone told me can engage a locking type system in the rear wheels, and keeps the engine in gears longer....and then a final switch which is tow and haul, AWD...which again holds the engine in it's power peak through the gears, when towing. But there is no automatic AWD, I always have to manually switch from 2WD to one of the three AWD systems. AWD is not on all the time, nor does it automatically switch into AWD, when traction demands. It is always a driver decision and then a manual switch of the control knob into the selected mode.
Anyway I have a gravel driveway, a bit steep, which over the past couple of days had a couple of 2 foot + snow drifts that I drive into, turn around backwards to then reverse into our garage.
The pickup truck had difficulty....bit of axle hop both front and rear axle trying to get traction in the snowdrifts, wheel spin, while the Traverse in AWD just cruised into the deeper snow and backed out with little drama, no axle hop, hardly any wheel spin, just smooth traction in and out.
Both have half decent ground clearance. But the tires are different, although both are light truck tires. It maybe the important factor.
The pickup had 255/70-17, the SUV has 255/65-18 and the SUV wheels are 7.5 inches wide X 18. Don't know the width of the pickup's wheels, probably similar. Both sets of tires were all season, but I have been impressed with the SUV's tires...so far they seem to brake well on hardened ice and deeper snow without the ABS cutting in very much at all, if at all (-25-30), accelerate and corner reasonably well with little slippage in winter conditions. So I think the deciding factor may be which tire has the better grip, also the fact that the SUV with all that sheet metal (body) has more weight over the rear drive axle than an empty pickup box.
I just found it interesting as to how, both all drive power...worked in the same conditions, same snow depth, etc.
BTW, I'm a believer in having winter approved (Mountain snowflake deal) snow or all year (not all season) tires. We had Goodyear Assurance All Weather tires...with the winter approval symbol on our previous FWD sedan and they were excellent in winter. They replaced the standard factory all season hi po tires, that were lousy in winter conditions.
But these SUV all season tires surprised me with their winter grip, even at extreme temps. So much so, that I haven't determined the need to replace them. Remember though this is prairie, flatland driving not mountain driving which is a different kettle of fish.
Tire technology seems to be increasing quickly.