
Replacing a car's transmission is considered a major overhaul. The functions of the transmission and the replacement method are as follows: Method for replacing the transmission: Replacing the transmission assembly requires removing the old transmission. The connection between the transmission and the engine must be disconnected, and then the entire transmission is lifted out. For some all-wheel-drive models with complex drivetrain systems, due to insufficient working space under the chassis, the entire powertrain must be removed when dismantling the transmission, after which the transmission and engine are separated. Functions of the transmission: It changes the gear ratio to expand the range of torque and speed variations of the driving wheels, adapting to frequently changing driving conditions. It allows the car to reverse while maintaining the engine's rotation direction. By using neutral gear, it interrupts power transmission, enabling the engine to start and shift gears, and facilitates gear shifting in the transmission. Composed of gear transmission mechanisms and control mechanisms, it can also be equipped with a power take-off unit.

Replacing the transmission definitely counts as a major overhaul. Think about it—the transmission is one of the heart components of a car, and pulling it out entirely for a replacement is a massive job. Let me tell you, this isn't a minor task—you'll need to lift the car, possibly remove other parts like the driveshaft or engine, and the whole process can take days with high labor costs. I've seen plenty of folks shell out thousands to get it done right in my repair experience. Plus, after reassembly, it needs recalibration, or the car won't drive smoothly. This operation directly impacts vehicle performance and can drastically drop resale value, so in terms of scale and consequences, it's a serious overhaul. Bottom line: don't delay—get a professional diagnosis for safety.

From my experience as a car owner, replacing a transmission is a major undertaking. It's not as simple as changing tires or brake pads; the transmission connects the engine to the wheels, and removing it requires dismantling a bunch of components, consuming time, effort, and money. Most repair shops classify it as a top-tier repair job, with costs potentially starting at several thousand, not to mention concerns about part compatibility. I remember after one failure caused my car to slip, the replacement took a week just waiting for parts—it felt like the entire car was being reassembled. The key point is its impact on long-term reliability—when the transmission fails, the car is practically immobilized. So yes, this is absolutely a major repair-level issue. Regular fluid maintenance can prevent it, but once problems arise, be prepared for a significant financial hit.

For those who often tinker with their cars, replacing the transmission is indeed considered a major overhaul. The entire process involves heavy mechanical work, requiring disconnection of the control system, draining fluids, removing the transmission unit itself, and then installing and calibrating the new one. It's a time-consuming and labor-intensive job—simple cars might take a day or two, while more complex models could take even longer; costs range from a few thousand to tens of thousands. I've even seen cases where surrounding parts were accidentally damaged during removal or installation, adding to the hassle. In short, in terms of repair scale and risk, it's far more serious than an oil or filter change—it's a major overhaul for the vehicle. Regularly checking shift smoothness can help prevent issues.


