LG WM3900HWA Loud Banging On Spin

Washer Shock Absorber Kit

These friction-based dampers are designed to provide resistance against the oscillating motion of the outer tub. Over time, the internal friction pads wear down, resulting in a near-zero damping coefficient. This loss of kinetic energy absorption allows the tub assembly to move beyond its designed clearance, striking the washer cabinet during high-speed spin transitions.

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Drum Flange (Spider) Assembly

The aluminum spider arm supports the stainless steel drum and connects it to the drive shaft. Detergent buildup (biofilm) causes galvanic corrosion of the aluminum, eventually leading to a fracture in one of the three arms. This structural failure causes the drum to wobble significantly on its axis, producing a heavy metal-on-metal banging sound as it impacts the plastic outer tub.

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Tub Suspension Spring

Two heavy-duty helical springs support the static weight of the tub assembly. If the plastic protective coating on the spring hook or the tub eyelet wears through, the resulting metal-on-metal friction can cause the spring to snap or the tub to hang unevenly. This misalignment causes the tub to oscillate violently and hit the frame when the spin cycle initiates.

SKU: 4970FR2084Z

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