Why transmission repairs so expensive complex timely repairs. . Adding more gears to a transmission increases its complexity, which directly correlates with higher repair costs. Each additional gear requires extra components such as clutches, gears, bearings, and shift solenoids, multiplying the potential points of failure. With more gears, the transmission’s internal components endure increased stress and wear, necessitating more frequent maintenance and repairs. Moreover, the intricate design and integration of these components demand specialized knowledge and skills for diagnosis and repair, often requiring certified technicians and specialized equipment, further elevating repair costs. Furthermore, the complexity of modern transmissions with higher gear counts often involves advanced electronic control systems. Repairing or replacing electronic components, such as sensors, actuators, or control modules, adds to the expense. Additionally, as transmissions become more sophisticated, the availability of replacement parts may be limited or more expensive, further driving up repair costs. Thus, while adding gears enhances performance and fuel efficiency, it also escalates the complexity and costliness of repairs, underscoring the importance of regular maintenance and cautious driving practices to mitigate potential issues.