Four Wheel Drive Transfer Case Service and Repair (4x4)

The transfer case may contain one or more sets of "low range gears". Low range gears are engaged with a shifter or electronic switch. On many transfer cases this shifter is the same as the one that selects 2WD or 4WD operation as described above. Low range gears slow down the vehicle and increase the torque available at the axles.

Low-range gears are used during slow-speed or extreme off road maneuvers, such as rockcrawling, or when pulling a heavy load. Again, on all wheel drive sports cars this feature is often absent.

Some very large vehicles, such as heavy equipment or military trucks, have more than one low-range gear.