Just bought a new 100 and I love it. I can't say enough good things about it. One issue just surfaced today, when in reverse and going up hill the car begins to shake. It feels like the transmission is engaging fine, but then when I press on the gas the car is struggling to move. I can feel power train shake and shutter like something isn't catching quite right. There is no issue on flat ground, it seems to only be when the car is loaded and trying to roll forward, and the transmission is in reverse. No other issues with the transmission, everything shifts smoothly.