Why did the BYD Song Max recall and replace the transmission?
2 Answers
BYD Song Max recalled and replaced the transmission due to issues with the gearbox. The advantages of the Song Max's transmission and dual-clutch transmission are as follows: Song Max's transmission: This vehicle is equipped with two types of transmissions: one is a 6-speed manual transmission, and the other is a 6-speed dual-clutch transmission. The BYD Song Max series uses a 1.5-liter turbocharged engine, and the dual-clutch transmission is the most suitable to pair with a turbocharged engine. Advantages of the dual-clutch transmission: The dual-clutch transmission has high transmission efficiency and fast gear shifting. The dual-clutch transmission is developed based on the manual transmission, and its structure is similar to that of a manual transmission. The only difference is that the dual-clutch transmission has an additional set of clutches and a gear-shifting control mechanism. The dual-clutch transmission is connected to the engine via clutch plates, which is why it has high transmission efficiency.
I recently followed the recall news about the BYD Song MAX. The recall for this model's transmission was mainly due to potential risks with the dual-clutch module. Inside the transmission, there is a hydraulic control unit, and the manufacturer discovered defects in the sealing ring material, which could lead to oil leakage over prolonged use. Once transmission oil leaks, the clutch plates will experience abnormal wear, with the most noticeable symptom being strong jerking during low-speed gear shifts, and in severe cases, even power interruption. I recall the announcement mentioned that affected batches were concentrated in models produced between 2020 and 2021. Although the replacement can resolve the safety hazard, many owners have reported long waiting times for parts. This recall actually serves as a reminder that the cooling and sealing design of dual-clutch transmissions is particularly critical.