With my limited knowledge of how cars work, I'm only assuming that my transmission is crapping on me. I feel every jerk of when it switches gear even when fully warmed up, sometimes it would just drop 1k rpm and a gear for no reason at a steady speed when I'm going uphill, I can't get it past 3k rpm in any gear but first and it has trouble going past 85 mph.

Maybe I'm just being naive, but I do want more power and more control of my car, which is why I'm thinking of an option of swapping it to a manual. Any yes, I would like to keep this car and run it to the ground, hopefully for years to come.