This is especially true of the full-time systems, which power all four wheels at all times. While there may be a slight drop in fuel economy, it is a small sacrifice for many drivers who live in ...

Some recent 4WD vehicles do have a full-time, automatic mode that decides when to switch from 2WD to 4WD or how to adjust the balance of power. But these systems tend to kick in only at lower speeds.

there is a wider range of cars that have 4WD. 4WD can have maximum traction under many different conditions. Traction is ...

The terms four-wheel drive, all-wheel drive, and full-time and part ... a problem known as wind-up. Part-time 4WD systems are often found in older off-road vehicles and trucks, such as the Suzuki ...