Hi I have a 2006 Subaru Impreza 2.5 Wagon with a manual transmission. I recently got a new clutch installed (about 1500 Miles ago.) Sometimes it is hard to shift gears. Typically when it is hot outside. Also, now when I start going uphill from a stop, I have way less power and feel like I may not make it up the hill. I usually do but at an almost stalling pace.