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The B1376851 is a genuine OEM Goodman motor mount band (belly band) engineered for the GMT140-5BB gas furnace and compatible Goodman/Amana blower assemblies. This steel band wraps the blower motor and secures it to the mounting legs inside the blower housing, holding the motor concentric to the wheel and damping vibration for quiet, balanced operation.
The genuine Goodman band matches the motor diameter and the housing bolt pattern precisely, so the blower stays centered and vibration-free. Universal bands often require bending or shimming and can allow the motor to shift, leading to wheel rub and noise. For a clean, rattle-free fit, OEM is the right call.
Replacing the band usually means pulling the blower motor and wheel to slide the new band into position. Plan for 30–45 minutes and label wiring and set-screw positions before disassembly. Cut power at the breaker before removing the blower deck.