I have a 2013 Challenger r/t classic. I purchased the car in may. its a 6 speed manual. gradually I have been having problems with the tranny. it has become difficult at times to shift. the hardest things to do is go from 1st to 2nd. its not just 1st that sticks, its every gear. sometimes I can feel the gears grind. has anyone had problems with the manual transmissions?