The cost of repair depends on what is broken. But the engine is worth more than the gearbox in terms of price alone.
An analogy, the engine is like the heart of a person, a good engine can withstand higher labor loads, to provide the body with the highest energy. The transmission is like the human brain, controlling how to use this power. The chassis is the limbs of a person, how to maintain balance such as in running, cornering, mountain roads to maintain balance without hurting themselves. A person's brain can be stupid to live, limbs are not flexible can also make do or but without the heart is all over.
And the engine is the most complex piece of equipment in any automobile. It converts naturally inoculated chemicals into explosive force, then explosive force into propulsion, then propulsion into rotational force. Which also has to drive the generator to feed the spark plugs for ignition. Drive the valves to control the flow of oil and gas in and out. Finally, the crankshaft into a steady stream of rotational force. Engine we commonly used civilian engine from single bar to inline 6 just engine. From the v6 engine with angle to v12/w12 w16 engine, there is a class of horizontally opposed engines, but the most bizarre to say that Mazda's rotor engine engine without a cylinder block engine. They are the crystallization of the most intelligent.
But the transmission is also quite technological content. Manual gearbox current family sedan up to 6-speed manual + reverse gear General are 5-speed ? The earliest our domestic red flag only three gears a reverse gear two forward gears. Development to the present automatic transmission has become the mainstream
The cheapest automatic transmission is a kind of transmission called AMT In fact, it is in the manual transmission on the improvement, but the comfort is very poor! Can't talk about smart.
The next is the dry dual-clutch transmission (Volkswagen's mainly driven dual-clutch transmission), his advantage is very high transmission efficiency, corresponding to the fast but the current heat dissipation problem is not good to solve. Wet dual-clutch transmission to be better but the best dual-clutch to belong to the Porsche company's pdk transmission, the price of a transmission can buy a Volkswagen Maiden medium car.
Then there's the continuously variable cvt transmission, which has less torque and is suitable for a family car, but is smoother and more fuel-efficient, though less responsive.
The most expensive gearbox is the torque at gearbox, from the former 4At to the most widely used 6at, which is now matched to 10at. But the 7-speed is enough for a family car. The at transmission? Transmission losses are slightly higher but smoothness and intelligence and stability are the highest.
Now we have our own domestic AT gearbox manufacturers, the domestic Ruisheng already has the ability to produce 8-speed at gearboxes? Breaking the monopoly of Japan's Aisin gearboxes, the automobile is on the rise!