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89-93 Dodge 5.9L Cummins Replacement Thermo Switch

Thermo Switch for 1989-1993 1st Gen Dodge Automatic Cummins.

When this sensor goes bad, it can prevent your transmission from going into overdrive.

This is a 3 wire sensor. If yours is a two wire sensor, please remove it and check the part number. We've seen a couple that had a Cummins 3920364 sensor.

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