best tranny temp sensor location - Ford Bronco Forum
View Poll Results: Best Tranny Temp Gauge Sensor Location
Return line 4 8.70%
Feed line 10 21.74%
Pressure test port 20 43.48%
Pan (drill and tap a hole) 12 26.09%
Other 0 0%
Voters: 46. You may not vote on this poll

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post #1 of 42 (permalink) Old 12-19-2012, 03:56 PM Thread Starter
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best tranny temp sensor location

i want to hear where you think is the best place for an aftermarket tranny temp sensor to be installed. this has been debated many times i think its time for a poll


-----96 5.0 E4OD--------------88 5.8 C6--------------96 5.8 E4OD------
---------KIA-------------------Mud/Trail---------------Daily Driver------
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post #2 of 42 (permalink) Old 12-19-2012, 03:57 PM
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post #3 of 42 (permalink) Old 12-19-2012, 04:01 PM Thread Starter
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really any auto tranny. C6 AOD E4OD. anything really that you would think helps to know the temp. i dont think you would need to know in say Unforgivens KIA but in say anythnig that offroads or tows or even races

i see really good reasons for any of the spots but not so much for the pressure test port. the return line lets you know how cool the fluid is coming into the tranny and lets you know your coolers are working properly. the feed line tells you how hot the fluid is comnig out which says how hard your tranny is working. the test port doesnt really say much because the fluid doesnt really flow so its really jsut the tranny case temp. the pan tells you more of an average of how hot the tranny fluid is.

i myself might even put in 3 sensors and use a 3 way switch to change the guage back and forth between them


-----96 5.0 E4OD--------------88 5.8 C6--------------96 5.8 E4OD------
---------KIA-------------------Mud/Trail---------------Daily Driver------
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post #4 of 42 (permalink) Old 12-19-2012, 04:17 PM
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I use the pressure test port and think it's fine. the hole is already there and it's a convenient location.

but hey if you want to use 3 sensors, go for it and post up the results..would be interesting to the how much of a variation in temp there is between the different locations.
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post #5 of 42 (permalink) Old 12-19-2012, 05:31 PM
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I voted for feed line. That is the hottest the fluid is going to get there for you know when your in trouble.

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post #6 of 42 (permalink) Old 12-19-2012, 05:45 PM
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Quote:
Originally Posted by jermil01 View Post
I use the pressure test port and think it's fine. the hole is already there and it's a convenient location.

but hey if you want to use 3 sensors, go for it and post up the results..would be interesting to the how much of a variation in temp there is between the different locations.

x2

I want to know the temp inside my trans, not outside. I will say that I had a 50 degree difference between my pan mounted sender and the current pressure port mounted sender. Then again, I have a lot of external cooling mods...
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post #7 of 42 (permalink) Old 12-19-2012, 08:49 PM
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Quote:
Originally Posted by jermil01 View Post
I use the pressure test port and think it's fine. the hole is already there and it's a convenient location.
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post #8 of 42 (permalink) Old 12-19-2012, 09:15 PM
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PTP....it's there and easy to plumb. I don't want to go cutting into lines all over and risk leaks later on. I can compare with others that have installed there as well. The tranny guys that rebuild on this site also recommend this location. Once I had the gauge, I would never want to confuse myself with multiple gauges for a tranny. I moved on to a manually activated puller fan for the tranny external cooler for summer high temp traffic or slow going on trails at altitude.

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post #9 of 42 (permalink) Old 12-20-2012, 09:04 AM
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Test port. I just added mine last night.

That being said, I think other locations would give more accurate results. The readings at the test port will give a relative temperature of the trans and fluid, so I am aware of any issues. Any overheat at one portion of the trans will likely be an overheat of the whole trans.

BTW- Don't be fooled by easy, convenient holes.
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post #10 of 42 (permalink) Old 12-20-2012, 09:45 AM
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yo,
as the Kingfish, JER, da Shado, SACK, mnl advised & Paul (thePUNISHER) wrote elsewhere in FSB, the best place to get the trans temp is the line pressure port (shown as "TAP" in diagram) (1/8" NPT ID according to SEATTLEBRONCO) in the driver side of the trans. the auto meter sender threads right in here. nice clean install..."
Jasonhughes wrote that it is a 12mm pipe plug.

Also, I was thinking of using the E4OD's internal Transmission Oil Temperature Sensor (also ref to as Transmission Fluid Temperature (TFT)) Sensor for readings;
Location in Valve Body Diagram

Source: by SeattleFSB (Seattle FSB)

. It is a temperature-sensitive device called a thermistor. The resistance value of the transmission fluid temperature sensor will vary with temperature change. The powertrain control module monitors voltage across the transmission fluid temperature sensor to determine the temperature of the transmission fluid. The powertrain control module uses this signal to determine whether a cold start shift schedule is necessary. The cold start shift schedule lowers shift speeds to allow for the reduced performance of cold engine operation. The powertrain control module also uses the transmission fluid temperature sensor input to adjust electronic pressure control pressure for temperature effects and inhibit torque converter clutch operation during the warm-up period


This is for the 94 (see below)
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post #11 of 42 (permalink) Old 12-20-2012, 10:03 AM
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Quote:
Originally Posted by mnlabgeek View Post
Test port. I just added mine last night.

That being said, I think other locations would give more accurate results. The readings at the test port will give a relative temperature of the trans and fluid, so I am aware of any issues. Any overheat at one portion of the trans will likely be an overheat of the whole trans.

BTW- Don't be fooled by easy, convenient holes.

Hmmmm, good advice, I'll try not to get fooled into anything I'll regret, but the temptation.........

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post #12 of 42 (permalink) Old 12-20-2012, 10:08 AM
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My pressure test port is in use on my AOD so what would be a good fall back? the feed line going to the cooler?

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post #13 of 42 (permalink) Old 12-20-2012, 01:26 PM
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The TFT (if present in the particular model of trans) is in the best location - that's why the engineers who designed the trans put the sensor there. There IS fluid flowing past the test port, so that might be the next-best. The goal of the sensor is to find the HOTTEST fluid in the trans, so the outlet to the cooler loop is a close third (maybe 2nd), but only if you keep the sender very close to the trans case (before any cooling can occur, and away from the exhaust). The pan is where cooling occurs, so I wouldn't put one there. The only reason to have one on the return line would be to monitor the COOLER(S); not the trans.
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post #14 of 42 (permalink) Old 12-21-2012, 10:30 PM
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I did a lot of research into this before I put my sensor in, and I will tell you that every location has positives and negatives, and you will find people who adamantly support each location.

In my opinion, after all the research I did, is that it doesn't matter. What DOES matter is that you look at the guage often and get to know your truck. If your guage usually reads 160* and you're wheeling hard and it says 260* - then you're in trouble.

So where ever you put it, learn where normal is for your truck. And when you're wheeling, pay attention to the guage so you don't cook your trans.

Last edited by Ryan87LX; 12-21-2012 at 10:33 PM. Reason: subscribing
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post #15 of 42 (permalink) Old 12-26-2012, 12:17 AM
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In the output line for the cooler, even though mine personally is in the test port, but when I put in my tranny filter I plan to put it in one of the ports of the filter base, now where to mount it?
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post #16 of 42 (permalink) Old 12-27-2012, 01:41 PM
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Quote:
Originally Posted by mnlabgeek View Post
Test port. I just added mine last night.

That being said, I think other locations would give more accurate results. The readings at the test port will give a relative temperature of the trans and fluid, so I am aware of any issues. Any overheat at one portion of the trans will likely be an overheat of the whole trans.

BTW- Don't be fooled by easy, convenient holes.
Since the sensor doesn't sit in fluid, when you installed the sensor in the test port, did you lose any fluid or was it a fairly clean install, fluid wise? Thanks! -Kevin-

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post #17 of 42 (permalink) Old 12-27-2012, 05:40 PM
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Lost about 1 drop. Took all of 30 seconds. Just finished wiring the gauge, which took much longer (darn E-lectronics).
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post #18 of 42 (permalink) Old 12-28-2012, 08:56 PM
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Lost about 1 drop. Took all of 30 seconds. Just finished wiring the gauge, which took much longer (darn E-lectronics).
Nice, that's what I figured. I picked up an Auto Meter oil pressure and water temp electric gauge and just need the trans temp. Auto Meter has a cool 3-gauge pod that mounts between the rear view mirror and the headliner..... -Kevin-

http://www.summitracing.com/parts/atm-18017

http://www.summitracing.com/parts/atm-7549

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post #19 of 42 (permalink) Old 12-29-2012, 10:30 AM
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Those Phantom series of gauges look like Dodge....maybe that was your plan.

Did you see the Autometer 3357 gauge with black face? About $20 cheaper too.
http://www.summitracing.com/parts/atm-3357/overview/
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post #20 of 42 (permalink) Old 12-30-2012, 05:04 PM
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Quote:
Originally Posted by mnlabgeek View Post
Those Phantom series of gauges look like Dodge....maybe that was your plan.

Did you see the Autometer 3357 gauge with black face? About $20 cheaper too.
http://www.summitracing.com/parts/atm-3357/overview/
Those are nice too just a little plain like the old SW gauges! http://www.summitracing.com/parts/sw...2/media/images
I just like the double outline and the White face with the half Red pointer, just caught my eye.
I picked them up off Craigslist, new in box, for half price but he didn't have the trans..... -Kevin-

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