DIAGNOSIS The spider arm, which connects the inner drum to the drive shaft, has corroded and cracked. This is a common failure on this series. The unbalanced drum causes the noise.
FIX This is a major repair. You must disassemble the washer to access the inner drum. Remove the front panel, disconnect the bellows, and extract the inner basket. Inspect the spider arm at the rear of the basket. If it's cracked, the entire inner basket assembly (part #W11087657) must be replaced.
IF THAT DIDN'T WORK If the spider arm is intact, the noise could be from foreign objects (coins, bra wires) between the inner drum and outer tub. You'll still need to partially disassemble to remove them.
HEADS UP Replacing the inner basket requires re-sealing the front bellows perfectly. Any misalignment causes leaks. Consider the cost of the part and labor—it often approaches the value of the machine.