Another tip. Since you're taking it to a shop, I'm assuming that something went bad in it. In the shop that I used to work in, whenever we'd replace an automatic transmission, we'd flush the cooler. Our method was this: First, blow all of the old fluid that you can out of the lines into a container such as an oil drain pan. Be careful to use very little air to do this, otherwise, fluid will go EVERYWHERE. After you've done this, we would get a gallon of clean, new solvent. Pour half of it into a clean container. Using some rubber fuel line, connect a cheap, inline electric fuel pump to one of the cooler lines. Install a filter before the pump. hook a feed line to the filter and then put the other end into the container of clean solvent. Run another line (rubber) from the other cooling line back into the solvent, making a complete circuit. Then hook the fuel pump up to a battery (we used a spare batter that was slid underneath the vehicle). Let the pump run for about 30 minutes. After that, disconnect the pump, gently blow the dirty solvent out of the cooler and lines. Dump the dirty solvent and run the other half gallon through the lines the opposite way as the first time. After another 30 minutes or so, disconnect the pump from power, blow out the lines as well as you can again, and then put everything away. The reason for doing this is to ensure that any pieces of metal that may be lodged in the cooler or lines is removed. The fresh transmission fluid is a good solvent and one piece of metal in the wrong place can mean pulling the transmission back out and taking it back to the shop again. It's not very likely, but it can happen. Just think of doing this as adding a little extra insurance to the job.