Hey @Ethan Burdette - like your Custom Title, LOL!
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Hey @Ethan Burdette - like your Custom Title, LOL!
While I might have agreed with the test port being a less-than-ideal spot, I've tested it extensively and using the aftermarket gauge sender in the test port vs. reading all over a thoroughly worked-out transmission using an IR temp gun with a "max read" function, scanned everywhere from torque converter, case, pan, cooling lines, everywhere - about a 1 degree variance from the gauge reading. First one I did like this was on a 4L80E in my '96 dually wrecker. Ran it stupid hard to get it nice and hot before checking it. 100% confidence in that location for the sender, for me, anyway. Did another one later on a 4L60E in my '94 C2500LD.I've seen where guys cut a hole in the pan and weld a bung for the sensor there. That's better than using the 1/8" NPT test port where your sensor is not in the flow of the fluid. I don't know if splicing in to the internal sensor will cause issues with its controls.
Every splice into a cooling line is a potential leak. Now if you're talking about a solid fitting so there's no additional clamps or hose pieces, I'll retract that statement. I just know more than one person that got a little careless hooking up an aux trans cooler for example and the hoses blew off under load and wasted their transmission in a hurry.Whenever I do my trans cooler lines (rusty) I am planning to put in a T fitting where the fluid enters the external cooler by the radiator. That will capture the oil temp close enough.
Whenever I do my trans cooler lines (rusty) I am planning to put in a T fitting where the fluid enters the external cooler by the radiator. That will capture the oil temp close enough.
I'm no student of fluid dynamics but that really sounds hard to believe. My personal, uneducated opinion. And, not what I've observed in real-world practice.I have been told on the 4L60E's the test port is an "arctic zone" and reads 20-30 degrees cooler than the actual fluid temp because the fluid only "splashes" the sensor.
While I might have agreed with the test port being a less-than-ideal spot, I've tested it extensively and using the aftermarket gauge sender in the test port vs. reading all over a thoroughly worked-out transmission using an IR temp gun with a "max read" function, scanned everywhere from torque converter, case, pan, cooling lines, everywhere - about a 1 degree variance from the gauge reading. First one I did like this was on a 4L80E in my '96 dually wrecker. Ran it stupid hard to get it nice and hot before checking it. 100% confidence in that location for the sender, for me, anyway. Did another one later on a 4L60E in my '94 C2500LD.
Every splice into a cooling line is a potential leak. Now if you're talking about a solid fitting so there's no additional clamps or hose pieces, I'll retract that statement. I just know more than one person that got a little careless hooking up an aux trans cooler for example and the hoses blew off under load and wasted their transmission in a hurry.
Back to Ethan: short story - the test port worked perfectly for me in more than one application. It's the little pipe plug in the driver's side of the transmission case above the shifter.
Richard
I'm no student of fluid dynamics but that really sounds hard to believe. My personal, uneducated opinion. And, not what I've observed in real-world practice.
Richard