I’m finally getting around to installing my gauges and have a question about the transmission sensor. I have two choices, install the sensor above the pan, or my pan (mag-hytek) has a port in it. Is one preferred over the other?

 

Most of us use the port above the pan on the left side because it's there. It seem to work fine.
It also keeps the wire out of the way.
Just my .02

 

I'd go with the one above the pan too, mainly to keep the wires out of the way. There will be a slight temperature difference, but I think it's around 10* or less, so it won't make much of a difference.

 

10* or less, I'd run it where ever is easier to mount. Main thing is getting to know where the "Normal" temp is. If you want to compare with most people here, I'd put it in the port as to be in the same location. Then the only variation is gauge accuracy. Also as a note: Don't use any tape on the sensor as it is meant to ground thru the threads. I used a thread paste type sealant and haven't had any issues with leaks or sensor operation.

 

I used teflon tape on mine, but made sure to leave the bottom 2 or 3 threads bare so it can still ground. I haven't had any problems with leaks or sensor operation. I didn't have any paste sealant when I did mine, or I probably would have used that instead.

 

Thanks for all the replies. If I use the port on the tranny like you all have, do I need to drain the fluid to install the sensor?

 

No. You might get a small fluid drip, but as long as the truck as sat for a few hours after you last drove it, all the fluid should be drained back into the pan, below the level of the sensor.

 

Thanks,

Rich

 

Actually the pressure port where you mount the sensor is above the fluid level. As long as the engine isn't running when you pull the plug out you won't get more than a few drops to a tablespoon of fluid. If the engine is running, there is pressure there, so you would get A LOT of high pressure ATF blowing out!