2010 forester high rpms with low power

[Jakethesnake]

I have a 2010 forester with just under 150,000 miles on it. Recently the car started to act funny. I went to accelerate and it took forever. As I went to get on to the highway to come home, I was having a lot of trouble accelerating and had a top speed of about 65 mph. Wondering if it is the transmission, torque converter, or some other issue. I have no codes being thrown. The car will rev fine in neutral. First gear and reverse work fine, but after that it takes forever to accelerate and won't shift into 4th gear