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Eaton · Probes & Sensors
577.99500
In stock · ships from Knoxville
This is a tachometer speed sensor that reads the rotational speed of an external tone ring on Eaton medium- and heavy-duty transmissions.
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Verified fitment for 2 applications
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All confirmed applications for this part number.
Freightliner
Other applications
Freightliner
Other applications
Designed for 2-prong external tone ring speed sensing. Always verify transmission model and tone ring type before ordering.
Part data verified against 3 catalog sources
Numbers this part supersedes or interchanges with. Showing 4 of 4.
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It sends a pulsed signal to the speedometer and engine/transmission control module so the vehicle can display speed and shift correctly. It is commonly replaced when the speedometer acts erratically, the transmission shifts poorly, or a vehicle speed sensor fault code sets. The sensor is a 2‑prong, external‑tone‑ring design that fits Eaton C, T, W, and K‑series transmissions built between 1995 and 2010.
Part Number: 577.99500
TACH SPEED SENSOR
Vendor: Automann
Dealer: KP Services Crossville
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