Why does my under carriage of my Lincoln keeps catching on fire after going over 25 miles per hour? I am thinking it may be a seal or leak between the trainy and the drive shaft. And if so, would it be worth fixing? The engine is new factory rebuilt, but the car itself has 300,000 miles on it. Also so let me know what year Ford Crown Vic this Lincoln engine will fit into? I may want to keep this engine and put it in a Crown Vic if the Lincoln is not worth fixing. Please help