Another happy customer.
Took my wife's car to the Valvoline oil change shop we get our oil changed at, and had them do a transmission flush. Replaced the fluid with Valvoline Max Life fluid that I purchased at an Advanced Auto for about 70 bucks. Local Valvoline place did not have Max Life on hand. Many people here have switched to Amsoil synthetic when doing this, but it isn't cheap. About 10/quart. I opted for the cheaper route.
***I would like to note that when I checked the back labels of the Max Life, the quart size had "all Subaru" listed on recommended vehicles. The gallon size did not. It said to check the website for a complete listing of recommended vehicles, but when my wife checked, it just had the short list from the gallon size (no Subaru), but also said "and others". Thanks Valvoline.
It took almost 13 quarts plus the quart of Trans-X to do the job.
Most of the users on this thread have been using 1 15oz bottle of Trans-X with good results. When I went to make my purchase at a local Autozone, they also had a 32oz bottle. The directions on the 32 oz says to add I 32 oz for every 10 quarts of fluid, so I opted for the bigger size.
Make sure you get the stuff I posted a picture of above (post 74 in this thread). It is available at Autozone and other locations (h/t Valvoline:)
***The first product I bought was the only Trans-X item available currently at my local Advance Auto. It is called Trans-X High Mileage 75K. It is a completely different product than the product the users on this thread have been using. From the description on the can, it seems like it might be the same, but it is EXTREMELY thick. The correct product is about as thin as water. Try the other at your own risk.
As soon as we drove away from getting the job done, the transmission felt noticeably smoother. We drove the car about 3 or 4 times yesterday, and this held. I drove the car this morning, and still good. No delayed drive engagement, but this was an intermittent problem for us so we will see. I will say that the problem had been getting more frequent and worse.
Hope this helps, and thanks to everyone on the forum, particularly Rooster who just saved us about a grand. Owe you one.