When I put in 1st gear and start off, sometimes I can feel gas pedal stutters(viberates) once or twice sometimes3-4 times and I can actually hear noise too. it's really hard to explain that noise. it's like ghh-ghh-ghh it used to do only in 1st gear when starting off but sometimes it does in 2nd gerar every once in awhile now. what could this be? I got close to 50000miles on it and it's very 1st LC2. when it does that ghhh thing it feels like it's grinding something off.