Not best, but optimum Transmission?

7milesout said
making some rattling noise and seems to be slipping into neutral when I come to a stop before everything gets warmed up.

7milesout said
And I'm pretty sure the trans is not "fried" because the level was between the two marks and not at or above the FULL line on the dipstick.

7milesout said
Maybe I should have gotten a teaspoon and "topped off."

Step 1: Learn all about fluid levels. Step 2: Become transmission expert. Step 3: Go racing!