When starting from a sligh incline the car judders. If I increase the revs the car will start. There is a high take up for the 'bit' on the clutch. Do I need a new clutch??, if so, what cost am I looking at for supple and fit. Do I also need to look to replace the 'cam belt' as the car is 4 years old, but has only completed 31000 miles.