The Eaton Fuller Interlock Key, part number 8872189, is a genuine OEM component for manual transmission assemblies. The interlock key functions as a precision gear-selector safety element, preventing two gear ranges from engaging simultaneously and protecting the transmission's internal synchronizer and shift rail components from conflict. Sourced directly as an Eaton part, it is also referenced as HF8872189. Pro Gear and Transmission carries this genuine Eaton Fuller piece for fleet maintenance operations and independent repair shops. Call us to confirm proper fit for your specific transmission application before ordering.
Features
Genuine Eaton Fuller OEM manual transmission component
Functions as a gear-selector interlock, preventing simultaneous engagement of multiple gear ranges
Protects shift rails and synchronizer components from conflicting inputs
Sold individually (each)
Also referenced as part number HF8872189
Sold by Pro Gear and Transmission
