Sometimes the gear change is notchy, and other times it is OK. It does not crunch, but kind of crashes into the next gear (mainly from first to second gear) maybe as if you did not press the clutch down enough? Other times it is fine. I have read that these gearboxes are notchy. But why is it sometimes OK? The car has done 54,000 miles. I removed the CDV and changed the clutch fluid. The pedal engages a third of the way up. I am wondering if the clutch could be faulty. But l had a Mazda MX5 that did this, and two new clutches failed to rectify it.