This is a THREE pronged sender unit with a plastic housing (black).. your may look similiar with or without the plastic housing but These ARE 60's PSI... you will see a stampage of 60 on the nut shaped casting on the lower side of the sender unit.
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Term "Senser/ sender or Switch" is the same in this instance.
Common faults..
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Oil Leaks
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Erratic gauge operation
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Total electronic failure with the gauge reading zero or very high
This is for 82-84 Trans Am with the 5lt motor WITH Gauges.