I have a 2008 Panda Dynamic 1.2, owned 3 three years, mileage 130,000. Clutch failed recently, local (trustworthy) garage replaced clutch. But now crunches when selecting reverse. Garage then replaced Master Cylinder, Slave Cylinder and pipework. But still crunches when selecting reverse. Occasionally it will engage smoothly, but there are no special conditions when this happens. Gearchange has always been smooth prior to the new clutch installation. Any ideas as to what is causing this? Has the garage damaged something when removing and refitting gearbox?