Your rear drum bearing has worn through the plastic and is now hitting the metal support underneath it,
soon it will act like a guillotine and slice of the ball, the drum will fall backwards into the heating element and short to ground causing the fuse to blow the heater element to burn intwo and the whole thang will be dead in the water.
If you need further help, reach me via phone at
https://www.6ya.com/expert/dan_73bbd84fe1d95b61
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