I’ve searched and found several options for installing the sensor of a temp gauge.
1. Drill hole in pan and install sensor in transmission pan.
2. Replace plug on driver’s side of transmission with temp sensor.
3. Purchase remote filter and install temp sensor with that.
4. Install temp sensor inline with transmission cooler lines.
I’ve read where the sensor has been install before the transmission cooler and after the transmission cooler. Of course, before and after are going to be two different temperature readings. The easiest would be replacing the plug on the side of the transmission with the temp sensor.
With all these choices to install the temp sensor, I’m wondering what where the most accurate reading would be? I’ve purchased an Autometer temp gauge to install in a 700r4.

thanks
don

 

The most accurate place to put it, is where the thing whose temp you want to measure, is.

I'd recommend the side of the case if you want to measure the temp of the trans itself.

 

RB would that be the temp of the tranny or the tranny fluid? becuz i know those are pressure fittings on the side of the tranny and i know there fluid there, would that be the next best thing other then the pan?

 

If you put the unit into the trans case, it will measure the temp of the case, not the fluid. That's really what's important anyway, since the fluid will be at the temp of the case, plus whatever additional heat gets put into it in the torque converter; but the fluid goes straight from the converter to the cooler lines, so as long as the cooler works, the trans never sees that hotter fluid. If the cooler doesn't coole the fluid enough, then the whole trans temp will rise, and you'll see it on the gauge.

Personally I'd prefer to see the case temp; which should be in the 160°-175° range ideally when fully warmed up.

 

It's easier to plug it into the case also. The hole is already there.