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Old 03-30-2023, 06:08 PM   #1
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Cat 3208 TA Transmission Oil Pressure

When I start my engine the audible alarm starts, the gauges come on and my Transmission oil gauge pins out high, but now it stays pinned out high and does not go to a normal range and my audible alarm remains on.

Question 1: Is this a symptom of a bad transmission oil pressure sender? Or is the alarm an engine oil alarm which seems fine on my gauge panel.

Question 2: I assume the transmission Oil Pressure sender is on the exit of my transmission cooler see photo.

Thank You

Wade Cordy M/V Synergy
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Old 03-30-2023, 06:21 PM   #2
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My first thought is faulty sender but with out putting a multimeter to it I am only guessing.
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Old 03-30-2023, 06:30 PM   #3
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My first thought is faulty sender but with out putting a multimeter to it I am only guessing.

Thank You! Is it resistance that drives the pressures?
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Old 03-30-2023, 09:08 PM   #4
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When was the last time you changed the oil in the tranny?
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Old 03-30-2023, 09:11 PM   #5
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Thank You! Is it resistance that drives the pressures?
Well the switch is either open or closed. Get your manual out and it should tell you. You could also call a CAT mechanic
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Old 03-31-2023, 07:02 AM   #6
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Tranny Oil

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When was the last time you changed the oil in the tranny?
Thanks for the responses, I changed the Tranny oil around 200 hours ago. Prior to our Bahamas trip.
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Old 03-31-2023, 07:04 AM   #7
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From my reading everyone says my audible alarm is Oil temp and pressure NOT Transmission, but my transmission pressure gauge pegs out high.
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Old 03-31-2023, 07:26 AM   #8
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Pegging out high is normally a ground or bad sender. Clean contacts , check wire ends, and on the back of the gauge. Pressure senders work on the general pressure of the system. Check fluid level. Air in the system due to low fluid can cause air and erratic readings. The location of the sender will work anywhere. Its placement does not mean input or output of the line.
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Old 03-31-2023, 08:08 AM   #9
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You can replace the sender with a "T" and add a gauge.

pete
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Old 03-31-2023, 09:39 AM   #10
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Question 1: Is this a symptom of a bad transmission oil pressure sender? Or is the alarm an engine oil alarm which seems fine on my Wade Cordy M/V Synergy
Is the pressure sensor before cooler? If yes, how old is the cooler? When was last time the heat exchanger was pulled cleaned and tested?
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