Abstract: A guard assembly for protecting lower portions of an earthmoving vehicle, such as the engine, transmission, and drive train, includes a guard plate which is held captive within a first space defined by sidewalls and endwalls of the vehicle frame. The guard plate can move within predetermined limits in longitudinal and lateral directions within the first space. Prior art lower guard assemblies utilize threaded fasteners to secure the guards directly to the vehicle frame. This produces loosening and breakage of the threaded fasteners when the vehicle frame flexes and twists. The subject guard assembly allows the guard plate to move slightly as the vehicle frame flexes and twists. Since the threaded fasteners holding the guard plate in place do not penetrate the guard plate, the threaded fasteners are not overstressed or slipped at the joint interfaces.