I have a 2006 4WD CRV. I am finding the clutch has become hard to press down. Honda replaced the master cylinder, but that made no difference. Now they tell me the clutches can tighten with age in CRVs, and suggest, but don't promise, that a new slave cylinder may help. They can't guarantee that replacing the entire clutch system would make a difference. Huh? Don't clutches loosen with age? Can't they be adjusted? If I were to replace the entire system, why wouldn't it operate effectively? Help!