I just bought a TCI aluminum transmission pan and had planned to drill and tap it for the trans temp sender. Looking at the pan though the sides are only about an 1/8" thick and Im worried it wont be enough material. Will 1/8" be enough to drill and tap?

Or if anyone knows where I can get an adapter to put the sender in the drain plug (1/2"x20 SAE)?

 

Geno's sells a fitting that allows you to mount the sending unit in the hot line going to the cooler that works good. I moved my sending unit from my pan to the cooler line and feel like I get a much more accurate reading with it in the line.

 

Yeah I was just looking at that. I have the same TCI pan on my gasser and the B&M temp gauge on it came with the fittings to install the probe in the lines.

 

I second that motion. With the sensor in the pan, you are measuring (generally) the coolest temperatures in the tranny system. The output of the tranny coolers drain into the pan.

Now with the sensor in the hot line you are measuring the (typically) hottest fluid in the system, since the tranny has just used it and is sending it up for cooling. If your coolers are operating well, your tranny could be putting out 200º+ fluid while your pan sensor may only see 150º. IMHO the hot line sensor is the way to go. Better to see the temperature spike and be able to pull over and cool the tranny, than to burn up clutch packs (and other heat sensative things) because your pan sensor didn't catch it in time.

BTW, as mentioned earlier, Geno's sells the fitting to modify an existing line. Also Diesel Manor sells the complete line with the fittings already on it, just another option there. I went with the Diesel Manor line, since I bought my gauge kit there too.

Heres a picture of what the sensor in the line will look like :