Final answer:
A part-time 4WD system cannot drive at high speeds on dry roads due to the lack of a center differential, which could cause tire wear or drivetrain binding. It can handle steep terrains and allows manual switching between 2WD and 4WD but does not switch automatically nor engage front wheels independently.
Step-by-step explanation:
Since there's no center differential, a part-time 4WD system is unable to drive at high speeds on dry roads. Without a center differential, the system cannot account for the difference in rotation speed between the front and rear wheels when turning. This can lead to tire wear or drivetrain binding, which is why part-time 4WD should not be used on dry pavement where traction is high. The system is designed to provide additional traction in off-road or slippery conditions. It can indeed handle steep inclines or declines, and most part-time 4WD systems allow the driver to switch between 2WD and 4WD manually; however, they do not switch automatically. Engaging the front wheels independently is also not a feature of part-time 4WD systems which typically engage both front wheels simultaneously for increased traction.