Temp sender for trans

[vitalidle]

I wired in my isspro guages yesterday and have an issue with the trans temp. The gauge doesnt move off of 100 degrees running down the highway 60 with outside temps in the teens. Is that normal? The gauge wiring isnt polarity sensitive just two wires so you cant get them backwards! Any suggestions or is this normal with the ouside temps? Thanks

[shu873]

I know with my tranny temp sensor it plugs in to the high pressure test port, just above the oil level in the side of my tranny, but I have the torque shift tranny on my '06. What I've noticed is that it takes a full 20 minutes or better of driving to get an accurate reading as the sensor is not physically down in to the oil pan. I'm not sure about the mounting on your '02 as you have a different tranny than I do. It takes me 10 minutes or more before mine reads above 100 deg. I was told this is normal... Hope this helps, hopefully someone else with your same setup will chime in.

[bigcountrysg]

I had the same problem vitalidle, I ended up having the wires backwards. it didn't hurt the gauge didn't blow a fuse or nothing like that. It just didn't give you a reading. But now that the weather is cold outside. I have to drive hard and I mean real hard in order to get my trans temp gauge to move at all. My normal driving temp on my gauge does not exceed 125 degrees. Thats when I am pushing the truck and trying to put the throttle through the floor board. I mean I am on it and on it hard. In this cold weather my truck loves to run. Unlike the hot thick humid air we have in the summer. So being your even more north then me and your temps are colder that might be correct. But I would double check the wires make sure you didn't put them on the wrong posts like I did.

[vitalidle]

Okay after doing some searching I found that our tranny temps in normal operation in an unloaded condition is approximately 60-80 degrees above ambient temps. So that could be why I wasnt getting a reading above 100 degrees when the ouside temps yesterday were in the teens . Just a tid bit of info for anyone else running gauges!

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Last edited by vitalidle : 01-25-2007 at 07:43 PM.

[ipz2222]

shu873, you need to move that temp sender out of that pressure port. That port has over 250lbs in reverse and may blow the center out of the sending unit someday. Worse yet, blow it out while pulling a mountain with a trailer behind you. Burn trans and 1 big tow bill. Preston

[Lord Tauk]

Originally Posted by ipz2222

shu873, you need to move that temp sender out of that pressure port. That port has over 250lbs in reverse and may blow the center out of the sending unit someday. Worse yet, blow it out while pulling a mountain with a trailer behind you. Burn trans and 1 big tow bill. Preston

Interesting, never thought about it.

Autometer sending units for trans temp gauges is one piece, no pressed in nothing, etc. etc. It's just a solid piece of brass that just get an electrical signal converted to degrees on the gauge - Im not sure how the other manufacturers work on their temp gauges.

What's the difference from having an 1/8 National Pipe Tapered (NPT) plug versus a sending unit installed? They're both solid (Autometer sending unit), nothing that I can physically see on the temp sender will blow out anymore than a pipe plug blowing out IMO. The tempature sender/pipe plug would have to unscrew itself a good ways for the either the plug or sender to literally blow out. What Im also trying to say, there is nothing there to blow out except the whole sending unit itself, which wouldn't happen as the plug that's in there from the factory doesn't "blow out" aslong as it's properly fastened.

The temp sensor is on the left;

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Last edited by Lord Tauk : 01-23-2007 at 06:23 PM.

[99 7.3]

vitalide don't feel bad. mine is the same here in northern mich. it rarely comes off of 100 when i'm just driving. but when i plow it goes up. i have my sending unit in the pan. but just a word of advise. it is a royal pain in @$$ to weld it in there (i have the same thing as lord tauk has pictured, except i got a steel fitting and welded it in then put my sending unit it). but i got her done and it works like a champ.

[Grizzly]

Vitalidle!

Sounds strange! I have mine brand new installed. We do have cold weather now but after 10 minutes driving it moves up to about 120 and around 130 on the higway.
Your sendíng unit needs to be installed in place of the drain plug or on the back side of the trannypan to give you proper readings.

Good luck!

[straycat]

Mine is in the pressure port, Autometer, and sits around 120 just driving around town, and up to 140 on the hwy for any period of time.

[ipz2222]

straycat, if it is the the solid brass then it won't blow out, some have a ceramic center, those are the ones that will blow out.
Although haveing it in the pressure port is the easiest, there is a time lapse of fluid getting hot and trans case getting hot. Sender in fluid, fluid gets hot, sender shows it. Sender in case, fluid gets hot then must heat up the case before you know the fluid is hot. I'll try to run the test this weekend and see the time lag. Preston