Good point - Good additions above. I’d also check the drive coupler on the base & the mating socket on the jar: if they’re not fully engaged or the rubber teeth are chewed they’ll slip and make a grinding/skipping sound - look for rubber crumbs or shiny dust. Reseat the jar with a slight twist to mesh the coupler, and make sure the blade assembly/base ring is snug; if you see any wobble or damage on the coupler, stop using it and get a warranty replacement before it takes out the motor.
Good add. Also check the base sits flat - if a rubber foot is missing or uneven shim it or set the blender on a damp dish towel to soak up vibration. Load order matters: liquid first, then soft stuff, hardest or frozen on top, and pulse on low before ramping up. Unplug and gently check for side play in the blade; if the gasket is nicked try flipping or reseating it, and if the blade still wobbles keep blends short and skip ice so it doesn’t get worse.