The wife and I wanted to go for a ride Saturday and we started out of, but a few miles into the ride I stopped at a traffic light. I went to take off from the light and up-shift and the shifter was as hard as a rock. The shifter wouldn't shift up or down. a little finagling and I got to shift. Next time I had to stop and again it wouldn't down shift and after a bit of finagling it would finally start shifting normally. I have scheduled it to be looked at it under warranty, I bought the additional warranty for 7 years. I am just curious, has anyone else had this issue and what might the cause be?