When the engine is cold, I can't get the car into gear (1st, reverse, etc.), but after about 10 minutes of idle time when the engine is warm, the clutch will engage and shift normally through all 6 gears (and reverse) and run smoothly with no slippage, sticking or difficulty. Car has 68K on it and is the original clutch and trans. Any ideas on what the problem is and how to fix it? Thanks.