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The Goodman B1376857 Motor Mount Arm is a genuine OEM bracket designed for the ACVM960604CXAA variable-speed modulating gas furnace. This mounting arm secures the blower (ECM) motor within the housing, holding it in precise alignment with the blower wheel and absorbing operating vibration. A cracked, bent, or worn mount arm causes noise, wheel rubbing, and premature motor-bearing wear — making this an important part to replace at the first sign of trouble.
This genuine Goodman arm matches the factory bolt pattern and offset exactly, ensuring the motor sits centered in the blower wheel. Generic or universal mounts often require shimming and can leave the motor misaligned, causing noise and vibration. OEM fitment protects the motor and your warranty.
Moderate (3/5) — Requires removing the blower assembly and transferring the motor to the new arm. Disconnect power before servicing. Recommended for experienced DIYers or an HVAC technician; basic hand tools are needed.