Why won't a husqvarna 960450003 move but will go in gear?

If a Husqvarna 960450003 won't move despite being in gear, the issue may be related to a malfunctioning drive belt, a disengaged or damaged transmission, or a problem with the drive wheels or axle. Additionally, check for any obstructions in the wheels or the drive system that could prevent movement. It's also worth inspecting the linkage and controls to ensure they are functioning properly. If these components are all in order, further diagnostics may be needed to identify more complex mechanical issues.