BigHead Washer Shift Actuator W10913953 (49TYZ-E120A1) - 120V Synchronous Motor, Direct Replacement

BigHead W10913953 is a direct-replacement washer shift actuator (49tyz-e120a1 / 50SM21-1-221B) that switches your top-load washer between agitation and spin cycles to restore normal washing operation.

This heavy-duty replacement actuator fits many Whirlpool, Maytag, Kenmore and Amana top-load models and replaces numerous OEM numbers (including W10597177, W11481722, W10815026 and AP6037270). Built around a synchronous 120V AC motor, the unit is designed to resolve common symptoms such as clothes staying soaking wet, missing agitation, unusual noise during cycle changes, or F7E5-style faults. The part ships as a single preassembled actuator so you can swap it in quickly and get your washer back to working order.

How does this actuator restore my washer’s agitation and spin functions?

The actuator contains a synchronous motor and gear assembly that physically shifts the transmission between agitation and spin positions when signaled by the washer control. If your machine fails to switch modes, the old actuator often has worn gears or a failing motor; replacing it reinstates the mechanical motion needed for normal cycles.

• Replaces worn gear teeth and motor in one preassembled unit.
• Synchronous 120V AC motor rated at 4W, 3 RPM (CW rotation).
• Fits directly into models using 49TYZ-E120A1 / 50SM21-1-221B design.

Which washer models and part numbers are compatible with BigHead W10913953?

This actuator is compatible with many Whirlpool, Maytag, Kenmore and Amana top-load washers and directly substitutes several OEM numbers. Use your machine’s model or body label to confirm compatibility before ordering; it is not compatible with W10006355-style actuators.

• Direct replacements include W10597177, W11481722, W10815026, AP6037270 and PS11769864.
• Fits hundreds of models (examples: WTW4915EW1, MVWC416FW0, WTW4855HW1, MVWC565FW0).
• Check the washer’s model/body label to ensure it uses 49TYZ-E120A1 / 50SM21-1-221B actuator form.

What are the build quality and durability features of this replacement actuator?

BigHead’s actuator uses reinforced ABS plastic housings and metal internal components to resist cracking and premature wear during frequent cycle changes. Each unit undergoes manufacturer testing for motor performance and repeated cycle stress so it can withstand the mechanical demands of day-to-day washing.

• High-grade ABS housing plus heavy-duty metal gear components for longer life.
• Motor tested to AC 120V 60Hz performance specifications to reduce failure risk.
• Designed to resist warping, cracking, and wear from repeated transitions.

How difficult is installation—and what safety steps should I follow?

This actuator is intended for simple DIY replacement with common tools; many users complete the swap in minutes. Always disconnect power and water first, and follow safe lifting practices when tilting or laying the washer down.

• Turn off power and water, then tape the lid shut before tilting the washer.
• Remove the bottom access panel, unplug the old actuator, and install the BigHead unit.
• Wear gloves and consult installation videos if you want step-by-step visuals.

Who is this for: The BigHead W10913953 washer shift actuator is aimed at homeowners and repair technicians replacing a failing or noisy actuator on compatible top-load Whirlpool/Maytag/Kenmore/Amana washers. Choose this part if your washer fails to switch from agitate to spin, produces loud clunks during cycle changes, shows related error codes, or if your appliance model lists one of the compatible part numbers. Confirm your washer’s model or the OEM number before purchase to ensure a direct fit.