The second gear has risen to the third gear, and there is a strong sense of frustration. At 60 miles an hour, the car body shakes. Can you change the oil and gearbox oil?

1.2 upshift to 3rd gear. After changing the transmission oil and oil, it has improved, but there is still frustration. It may be that the internal valve body is stuck, causing the gear shift to be frustrated. 2 There is a pause when the engine speed drops to 1500, and there may be a pause when the engine speed drops.

1 Clean the transmission valve body and check whether the valve body and solenoid valve are stuck. If there is no fault in the valve body, it is recommended to repair the gearbox. 2. Clean the throttle and check the engine system for fault codes with the diagnostic computer.