transmission sensor sending unit_location

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Aug 28, 2013 | 06:08 PM

garydmundy

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Joined: Aug 2009

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From: Banner WY Pop 42, yes 42

transmission sensor sending unit_location

Problem_ The last couple of days my transmission temp. gauge is not working properly. Stock gauge ( I know) but when I first turn on the key in the am, truck setting overnight, waiting for the glow plug light to go out, after 2 seconds (counting 1000 one, 1000 two) the transmission gauge will jump to the mid or normal range (half way between cold and hot). Drive the truck until engine gauge is in the normal range and turn it off. Turn the key back to the on position, same thing. Everything is working fine. Trans fluid is fine, no burnt smell, fluid and filter changed about 4000 miles ago. Question is two part:
#1 Does this sound like the transmission sensor sending unit?

#2 Where is it located?

Aug 28, 2013 | 07:13 PM

Shake-N-Bake

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Joined: Sep 2003

Posts: 6,096

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From: Mesa AZ

The sensor is in the solenoid pack inside the transmission. You can check the wiring harness on the right side of the transmission for damaged wires but my money is on a loose connection in the back of your instrument cluster. The '02-'03 models have been known to be a little troublesome from time to time. Some issues have been resolved by cleaning the terminals and making sure the connectors are seated properly.

Aug 28, 2013 | 08:08 PM

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

Posts: 24,717

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From: SE Florida

Quote:

Originally Posted by garydmundy

#1 Does this sound like the transmission sensor sending unit?

No, it does not sound like a bad sensor. It sounds like normal operation to me.

The stock gauge is calibrated to go to the middle of normal when the transmission is warmer than 50°F. What you are seeing is normal for warm weather.