I have a friend here with an elderly Fiat 2.5 turbo diesel who asked me a question this morning that am having problems answering. He tells me that his camper will go into gear OK when cold but when its been working all day he has difficulty selecting 1st and reverse gear. Its as though the clutch is not operating. If he switches the engine off he can then select 1st or reverse whilst holding the clutch in and then drive off. He tells me that there is no clutch slip at all. What could be his problem. The correct answer could mean a new funster.