Temp sensor

[PlayingWithTBI]

I'm thinking about buying a fittings for the test port and a t-fitting (and yes I'm am concerned about leaks too) and temporarily install both trans temp gauges in one of the trucks to see if there is a "real time" difference between the two locations. I may even buy two t-fittings and temporarily install them in the inlet to the auxilary cooler and outlet line of the external cooler.

That sounds like a good test! Let us know what happens.

 

[PlayingWithTBI]

Just to be sure.... Is this the test port incase I put it here?

Hard to tell from your picture but it looks like it.

 

[Joe Dirte]

Hard to tell from your picture but it looks like it.

It's just above shifter plugins. From what I've read on 4l60s that seems to be it but then again this is an 80. Gonna pick up a sensor this week.

 

[evilunclegrimace]

There is a reason that is called a test port. It is where you test line pressure in different gears while driving the transmission. There is no way that "Splash" lubrication.

https://www.atreman.com/wp-content/uploads/2016/04/4L60E-Checking-Line-Pressure.pdf

 

[evilunclegrimace]

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.

NOPE!

 

[alpinecrick]

NOPE!

Maybe!

 

[Schurkey]

You could put the sensor in a thousand potential places.

What's most important is the temp of the fluid in the pan--the stuff about to be drawn into the pump for circulation.

Put the sensor in the pan. Or don't bother with the gauge at all, which would be my suggestion.

 

[alpinecrick]

You could put the sensor in a thousand potential places.

What's most important is the temp of the fluid in the pan--the stuff about to be drawn into the pump for circulation.

Put the sensor in the pan. Or don't bother with the gauge at all, which would be my suggestion.

Could put the sensor in the trans inlet line coming out of the cooler, and that would be the same as the pan but keep it out of the mud, blood, and the beer..........

 

[delta_p]

Can you drill a hole in the pan someplace, and drill and tap for a thermocouple?

https://www.amazon.com/GlowShift-Transmission-Temperature-Sensor-Adapter/dp/B07Q5V3MRK

 

[PlayingWithTBI]

Could put the sensor in the trans inlet line coming out of the cooler, and that would be the same as the pan but keep it out of the mud, blood, and the beer..........

The more I think about this, with the sensor in the return line all you'll know is how well your cooler is working. If you put it on the other line you'll get a better indication of how hot your trans actually is.

Can you drill a hole in the pan someplace, and drill and tap for a thermocouple?

https://www.amazon.com/GlowShift-Transmission-Temperature-Sensor-Adapter/dp/B07Q5V3MRK

This looks to be the best option, IMHO.