
If the damage is not severe, it is recommended to repair it. Generally, the reason for replacing a transmission is either because it is beyond repair or the repair cost is too high. Whether a car's broken transmission should be repaired or replaced mainly depends on the extent of the damage and the cost of repair. Functions of a transmission: Changing the transmission ratio: To meet the traction needs under different driving conditions, allowing the engine to operate under optimal conditions and meet possible speed requirements. Enabling reverse driving: To meet the need for the car to move backward. The engine crankshaft generally only rotates in one direction, but the car sometimes needs to move backward, hence the reverse gear in the transmission is often used to achieve this. Interrupting power transmission: To stop power transmission to the drive wheels during engine startup, idle operation, gear shifting, or when parking is required for power output.

When transmission problems arise, the first consideration should be the economics. Generally, replacing it is more expensive than repairing. However, if the transmission only has minor issues that can be fixed by replacing a part, such as an oil pump leak or a stuck gear, then repair is cost-effective. The problem is that labor and parts costs are not low nowadays. Repairing an automatic transmission can easily cost several thousand or even tens of thousands, while manual transmissions are slightly cheaper. For vehicles over ten years old or with high mileage, I recommend first estimating the overall value of the car. If it's not worth investing a large sum, it might be better to replace or scrap it. Of course, find a reliable mechanic to diagnose the issue clearly before making any hasty decisions. Whether to repair or replace also depends on the local repair environment—big cities offer more options, while remote areas may require weighing the costs of repair versus replacement. The key is your own budget—don’t stubbornly repair just to save a few thousand, only to end up with even greater losses. In short, under financial pressure, prioritize simple solutions and avoid impulsive spending.

Transmission failures generally fall into two categories. Mechanical issues like damaged gears or twisted shafts are troublesome to repair, often requiring replacement of the entire assembly. Electronic control failures, such as sensor malfunctions or clogged valve bodies, can usually be fixed with repairs. As a long-time car owner, I always consider the transmission type when encountering such problems: manual transmissions have simpler structures where replacing faulty components is straightforward; automatic transmissions are more complex, especially modern dual-clutch or CVT types, carrying higher repair risks. In reality, repairable cases offer more cost-saving opportunities, while complete failures necessitate replacements. Vehicle history also matters - if poor maintenance with delayed fluid changes caused the issue, trying a fluid replacement might help. A word of caution: avoid random repairs at small shops, specialized workshops using genuine parts are more reliable. Years of driving and maintenance experience have taught me that prevention beats cure - regular checks of transmission fluid and filters can significantly reduce failure risks.

Don't rush to decide if the transmission is broken, diagnose the problem first. Common issues like jerky shifting or slipping could be due to low fluid or valve body failure – a simple fluid change costing just tens of yuan might fix it, saving time and money. For severe cases like broken gears, consider a full replacement. Back when I got my first car as a young driver, I foolishly messed around and wasted money. Now wiser, I recommend checking maintenance records: prioritize repair for newer or low-mileage vehicles; for older cars, skip the hassle and opt for replacement or selling as scrap. Safety-wise, transmission failures can be hazardous, so timely action is crucial. Avoid trusting roadside stalls – reputable shops offer peace of mind.

Repairing or replacing a transmission depends on the actual vehicle condition and budget. For manual transmissions, issues like gear wear or clutch-related failures are relatively inexpensive to fix, costing just a few hundred yuan. Automatic transmissions, such as DSG or traditional AT, often involve electronic control unit failures, which are more costly to repair—sometimes replacing it entirely is more practical. I always say, a car is like a friend; don't let it run with problems. Before making a decision, compare repair quotes with replacement costs and consult a professional. Also, consider the used car market: if the car is relatively new, repairing it can maintain its value, but for older vehicles, it's not worth excessive investment. Driving safety comes first—if there's a risk of stalling due to a fault, get it checked immediately without delay. Regular transmission maintenance is key; oil change intervals and driving habits directly impact its lifespan. Take good care of it to avoid unexpected expenses.


