Brian sent me a great suggestion about my transmission gauge strategy.  As you might remember, the style of gauges I purchased didn’t offer a transmission temperature gauge, so I decided I could use a water temperature gauge.  So, my next question was how to do it?  It was Brian’s suggestion to use a simple ‘T’ system.  I liked the idea, so I hit Home Depot and $17 later I had what I needed.

You can see the parts I bought in the first image.  In the second, you can see the additional part from the gauge install kit that was necessary to seal the thermometer sensor. Simple and inexpensive, I like it.  Now, I just have figure out which is the ‘output’ line and which is the ‘input’ line and then I’m set.