I have an R reg 1.2 Corsa and am now experiencing problems engaging the gears. It will not go into reverse at all and the other gears are quite tight. When the engine is idling and you do 'clunk' into one of the gears with the clutch kept down there is a slight change in engine note/noise. I can't be sure but I think the travel required on the clutch isn't what it used to be. Any ideas? Thanks in advance.