The maintenance required on manual gearboxes very much depends on the car’s usage and its mileage. On cars that do a lot of stop-start driving, clutches can wear out quickly, and if you can feel the clutch slipping when driving a car, it’s a sign that it is on the way out. Replacing a gearbox, even with a refurbished part, is expensive, however.\rThey are generally considered to be more reliable than automatics, too, because they use fewer parts and therefore have a much lower chance of failure than automatics.