GM has used many different four-wheel-drive control systems in its vehicles over the years, ranging from pure mechanical to electronically controlled. Each has its own diagnostic procedures, and the best source for understanding how these systems work will always be your information system. Some later model 4WD systems have scan tool capabilities along with diagnostic …
When in 4x4 auto mode, a certain amount of tire slippage (detected by the anti-lock brake sensors) cause the drivetrain to quickly transition from 2WD to 4WD High. It is a mystery to me when a reverse transition (back to 2WD) occurs, but it does occur. I use it with varying road conditions (potential for patchy black ice, for instance).Can anybody explain what the AUTO 4WD does? Does it make the truck perform like an AWD (all wheel drive) vehicle like a Audio for example where there is always power to all 4 wheels, BUT they are not "locked" like in regular 4wd offroad? OR, does it only "kick in" when one of the wheelsWe need to know a little about torque, traction and wheel slip before we can understand the different four-wheel-drive systems found on cars. A four-wheel drive system helps provide traction on snow or ice. Find out about four-wheel drive, the forces involved and see a simple four-wheel drive system. Driving in 4WD AUTO means automatically switching between 2WD and 4WD whenever the vehicle determines it needs to. For this system to work, your car’s transfer case must have a differential between the front and the rear, which allows the front and rear axle to rotate at different speeds when going around a corner.
Audi e-quattro distributes torque from the electric motors to the wheels in around 30 milliseconds, providing a remarkable level of control. European model shown. Specifications may vary. See how our legendary quattro® all-wheel drive has enhanced vehicle performance for 35 years.
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