How does an automatic gearbox work?
The most common type of automatic transmission uses hydraulic power to shift gears. The torque converter connects the engine to the transmission and uses pressurized fluid to transfer power to the gears. This apparatus replaces a manual friction clutch and lets the vehicle come to a complete stop without stalling.
What controls the shifting in a automatic transmission?
All automatic transmissions use a control module to regulate speed, gear changes, and clutch engagement. The TCM makes decisions based on the information it receives from the engine, making it the key to shifting gears and changing the speed. A powertrain control module also controls engine and transmission functions.
Can an automatic gearbox be repaired?
Automatic transmissions select the right gear ratio without any driver intervention. A manual transmission needs maintenance and it is checked during periodic service. It can also be easily repaired. But, automatics and CVTs are relatively maintenance free, at least according to most manufacturers.
What is the purpose of a sequential gearbox?
A sequential manual transmission is unsynchronized, and allows the driver to select either the next gear (e.g. shifting from first gear to second gear) or the previous gear (e.g., shifting from third gear to second gear), operated either via electronic paddle-shifters mounted behind the steering wheel or with a …
How does the gears in an automatic gearbox work?
The same effect can also be achieved by locking the planet gears to the planet carrier. Most automatic gearboxes have three forward speeds, and use two sets of epicyclic gears. The locking sequences of the epicyclic gear train are achieved by hydraulic pressure operating brake bands or multi-plate clutches.
How does the reverse gear in a car work?
The reverse clutch is also engaged, which locks the ring gear to the sun gear and both turn at the same speed. The planet gears cannot turn, so the carrier also turns at engine speed. Output is taken from the carrier shaft, which turns at engine speed (direct drive). Reverse gear is usually marked ‘R’ on the selector.
Where is the dipstick on an automatic gearbox?
Your car will have a dipstick to check your transmission fluid, the same way as you would your engine oil. This is generally at the rear of an in-line engine for rear-wheel-drive cars. If your car is a front-wheel drive, the dipstick will be located at the transaxle near the front of the vehicle.
How can I protect the life of my gearbox?
The best ways to protect the life of your gearbox are regular servicing and to make periodical checks of your transmission fluid. Your car will have a dipstick to check your transmission fluid, the same way as you would your engine oil. This is generally at the rear of an in-line engine for rear-wheel-drive cars.
