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The Goodman B1376857 Motor Mount Arm is a genuine OEM bracket for the Goodman WPH4360AMAA packaged unit. This arm secures the condenser fan motor to the cabinet or fan deck and holds it in precise alignment with the fan blade, so the assembly spins true, stays balanced, and keeps vibration and noise to a minimum.
A cracked, corroded, or bent mount arm lets the motor sag or shift, which throws off blade clearance, creates a hum or rattle, and accelerates bearing wear. Replacing all mount arms as a set during a motor swap is good practice — a fresh arm restores factory geometry and keeps the new motor running quietly.
Generic straps and universal brackets rarely match the WPH4360 hole spacing or arm length, forcing shims and re-drilling that leave the motor off-center. This OEM B1376857 matches the factory bolt pattern and offset for correct blade clearance and a vibration-free mount.
Easy (2/5). Disconnect power, support the motor, unbolt the old arm, and install the replacement with the original hardware. Verify blade-to-grille clearance before restoring power. About 15–20 minutes with basic hand tools.