Which factor could lead to difficulty while shifting the transfer case?

Extended operation in 4H mode can lead to difficulty while shifting the transfer case because this mode is designed for high-traction conditions, such as off-road driving or snow. When a vehicle is operated in 4H for an extended period on dry, paved roads, it can result in binding or premature wear of the drivetrain components. The different wheel speeds between the front and rear axles can create tension in the system, making it harder to disengage the 4H mode.

Proper use of the transfer case requires shifting out of 4H when transitioning back to regular driving conditions to avoid this binding. Continuous operation in 4H can prevent the system from functioning smoothly and may require additional effort or a specific technique to shift out of this mode, complicating the driver's ability to change gears effectively.

The difficulty in shifting caused by extended use can also be compounded by factors such as component wear and improper alignment in the drivetrain. Understanding the operational limits and appropriate conditions for each mode within the transfer case is essential for maintaining smooth shifting and overall vehicle performance.