Were do you have the probe mounted? Pan? Pressure port? line? I know the line would be the best place for it but it would be a bitch. What about the pressure port on the side(4l60e) how accurate would the reading be? Where is yours mounted?..

 

mine is in the pressure port...it differs about 56*(higher) than what the sensor in the pan reads

 

The factory location is in the harness in the pan...

I would NOT install it in a pressure port (line pressure) port, found under the neutral switch. if the probe is too long you will cause more damage due to lack of oil flow that heat could ever cause. But as long as you are sure the probe doesn't interfere....

 

I've had mine installed in the pressure port for a few years. On my setup it reads anywhere from dead-on accurate to 15-20 degrees over the factory sensor located in the pan. The recovery rate is tremendously slower than the one in the pan. I think the one in the pressure port either picks up case temperature or hot air off the engine. Either way, it is very slow to cool off when I'm cruising along on the highway.

 

So which one is the most desired to see? I would think pan temp... as that is where the pump draws its fluid and then sends it throughout the tranny, no?

I was happy to see GM kept some options in the standard dash harness... took my stock cluster out... and plugged in an Esky harness and waalaa... tranny temps now monitored. I also have a 180F thermostat for my Derale tranny cooler... once line temps read 180 or above the fan comes on. FWIW, the dash gauge and the Derale thermostat are pretty close

Bill

 

I would think the best would be the line comming out of the trans becasue thats the hottest point. The pan would be second best..IMO

 

mine has been in the pressure port for almost a year now with no problems...easy and fairly accurate

 

PML has cast aluminum trans pans that you can have them tap the pan for the npt fitting, i like mine allot, it seems to respond to the changes in temp quickly, just a idea...

 

Yea i like the idea of having it in the pan but the id have to remove my ORY and thats a pain it the ***..so i think ill go pressure port then when i put my other trans in ill go pan..

 

Ever thought of going with the wire that gm put in for the trans temp? I like to do things the easy way....... Electronics FTW!