
Car transmissions are generally located next to the engine. Here is some relevant information about car transmissions: 1. A car transmission is a gear-shifting device used to coordinate the engine's speed with the actual driving speed of the wheels, enabling the engine to perform at its best. 2. The car transmission can change the gear ratio, expanding the range of torque and speed variations of the driving wheels to adapt to frequently changing driving conditions, while allowing the engine to operate under conditions of higher power and lower fuel consumption. 3. There are four common types of car automatic transmissions: hydraulic automatic transmission (AT), mechanical continuously variable transmission (CVT), electronically controlled mechanical automatic transmission (AMT), and dual-clutch transmission (DSG).

When helping friends check out cars, the topic of the transmission's location often comes up. It's actually hidden between the engine and the wheels, serving as the car's 'gear-shifting hub.' In front-engine vehicles, the transmission is either right behind the engine or located at the bottom of the engine compartment, between the engine and the front wheels. If you look down under the driver's seat, you'll notice a gear shift lever. This lever connects directly to the transmission via cables or linkages. It's even more noticeable in rear-wheel-drive cars—if you look from the front seats toward the back, the raised 'hump' in the middle of the floor houses the transmission's longitudinal driveshaft. I once saw a mechanic remove a transmission during repairs—it was a hefty iron block about the size of a watermelon, nestled right in the center of the chassis.

When tinkering with an old car on weekends, you always need to figure out the transmission's location. It sits on the chassis like a square box connected to the engine crankshaft, with its exact position depending on the drivetrain: in front-wheel-drive cars, it's usually tucked on the left or right side of the engine, bundled with the differential; in rear-wheel-drive cars, it's mounted directly behind the engine, running beneath the center console straight to the rear axle. I remember once replacing a clutch—I had to crawl completely under the car to spot it, right above the exhaust pipe with several hydraulic lines dangling. For a quick orientation, feel the base of the gearshift lever and trace the linkage toward the front of the car; you'll find it within 30-40 centimeters.

When teaching my wife to recognize car parts, I always use the transmission as an example. When you press the clutch, it disconnects the transmission from the engine, and it sits right between the engine and the driveshaft. In a regular sedan, it's tucked under the front seats in the chassis area. If you lift the panel at the bottom of the center console, you can even see the shift cable going straight into it. In front-wheel-drive cars, the transmission looks more like a small backpack attached to the side of the engine, while in rear-wheel-drive and all-wheel-drive cars, it hides under the central tunnel—that's why rear-wheel-drive cars always have a hump in the middle of the rear floor.


