Automatic transmission temperature sensor the master debate...

Transmission and Drivetrain Tech

  1. j par

    j par Well-hung Member

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    Yes I'm sure I'm going to end up with something on the exit tube close to the transmission. I'll probably bend my own tubes and flare my own fittings..
     
  2. Duane

    Duane Well-Known Member

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    Not sure I am following you. I doubt that you could make your own
    Capillary tube. These come already installed on the gauge and have a fluid in the tube. The heat expands the fluid and pressurizes the gauge to indicate temperature.
     
  3. RustyRatRod

    RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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    You seemed unsatisfied with putting a sensor in the pan. Just trying to give you other options. Just tape a fuckin thermometer to the bottom of the pan.
     
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    • j par

      j par Well-hung Member

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      "Fuickin"... LOL.. you came up with a number of good ideas I've used but not every one of them is a masterpiece...
      Because I'm not following along with the thermostat in the dipstick idea doesn't mean it's not a good one and all, it's just not for me... getting hot headed because someone isn't using your idea..:realcrazy:...
       
    • RustyRatRod

      RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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      I thought about it from the oil dipstick heater I got for a customer once. I wondered if anyone made a temp probe for a transmission and damned if they don't. But it could be used for anything. Oil, transmission, coolant, up your ass......you know, whatever. lol I'm not hot headed one bit. Just throwin ideas out.
       
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      • j par

        j par Well-hung Member

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        Maybe if you put the probe deep enough up your ass you can tell how hot your head is lol...:thumbsup:...
         
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        • j par

          j par Well-hung Member

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          I just see a wire coming out of the top of the dipstick and now it's got to be long enough and slack enough for you to pull the dipstick out and then where does all this slack wire go? I'm just thinking it's going to be too hassle and not look as clean as I would like it to...
           
        • Duane

          Duane Well-Known Member

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          Yikes
           
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          • RustyRatRod

            RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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            I guess.
             
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            • Duane

              Duane Well-Known Member

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              • RustyRatRod

                RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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                Yeah, well. Consider the source I guess. lol
                 
              • Duane

                Duane Well-Known Member

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                Double yikes
                 
              • j par

                j par Well-hung Member

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                Anyways thanks for everyone who contributed ideas and experience...
                Now that I don't want to follow triple R's idea it's gone completely sideways...
                Anyways I'll probably just put something on the tube coming out of the transmission to the cooler...
                 
              • kursplat

                kursplat FABO Gold Member FABO Gold Member

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                airplane gauge
                download.jpg
                 
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                • Rat Bastid

                  Rat Bastid .004 light

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                  I didn’t say to not run a cooler. I said don’t run the fluid through the radiator cooler before an external cooler. Skip the radiator. Did PTC tell you to run the fluid through the radiator first?
                   
                • jas0162

                  jas0162 Well-Known Member

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                  Years ago i parted out an rv that had an aftermarket temp guage and a probe deal that went down in the dipstick tube. Probably made in the late seventys. It was electric, no idea how accurate it was. I thought it was pretty cool and kept it, but ive since then lost it of course.
                   
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                  • j par

                    j par Well-hung Member

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                  • gzig5

                    gzig5 FABO Gold Member FABO Gold Member

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                  • pishta

                    pishta I know I'm right....

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                    Metric, Imperial, Kelvin.....it would show the delta of the 2. Would need the proper sender and possible weird aircraft voltage. You dont want your trans to run too cold as it will wear faster and the shifts will be inconsistant for a racer. I suppose where you run may be a factor...cold climates, cool the trans and then pipe it through the static temperature of the radiator. Sending very hot trans fluid straight to the rad tank may not help your temperature bottom line let the cooler take the edge off it before it hits the rad. Here's a more common auto app
                    F%2Fwww.egaugesplus.com%2Fuploads%2F8%2F5%2F2%2F4%2F8524701%2Fs689572963557007764_p1839_i2_w1280.jpg
                    VEI Dual Oil Temperature Gauge
                     
                    Last edited: Sep 29, 2021
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                    • kursplat

                      kursplat FABO Gold Member FABO Gold Member

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                    • j par

                      j par Well-hung Member

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                      Awesome!!.. out of stock:(..
                       
                    • 66fyssh

                      66fyssh Don't Stop Believin' FABO Gold Member

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                      I misread your post. Thanks for clarifying. You bring up a great point. Now I'm wondering about the pros and cons of running it through the radiator also.
                       
                    • 12many

                      12many Well-Known Member

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                      You all can debate the merits of where to install a temperature sensor on the transmission, what is best or what temp reading is important to you, before or after cooling etc but from what information I gathered about how the factory did it (on trucks with that option for example) the sensor was installed in the rear servo pressure test port. That’s what I discovered in my research on where to install, and it couldn’t have been easier. The Stewart Warner electric gauge I’m using works. YMMV

                      89006395-BB9F-4683-A6A4-9BEF1833CE25.jpeg
                       
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                      • tjpatte

                        tjpatte Well-Known Member

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