What Causes Gear Shifting Jerkiness in Lavida?
2 Answers
Damaged solenoid valves are a major cause of jerky shifting. Below are the relevant details: 1. Symptoms of a faulty solenoid valve: Check for poor power wiring connections; Verify that the power voltage is outside the operating range; Inspect for coil desoldering; Check for coil short circuits; Ensure the working pressure difference is inappropriate; Monitor for excessively high fluid temperature; Look for impurities causing the main valve core and moving iron core to jam; Note if the liquid viscosity is too high, the frequency is excessive, or the service life has expired. 2. Solenoid Valve: The solenoid valve contains a sealed chamber with through-holes at different positions, each connected to different oil pipes. In the middle of the chamber is a piston, with electromagnets on both sides. The valve body is attracted to whichever side's magnetic coil is energized, controlling the movement of the valve body to open or close different oil discharge holes. The oil inlet hole remains normally open, using oil pressure to drive the cylinder's piston, which in turn moves the piston rod, thereby actuating mechanical devices.
After years of car experience, gear shift jerking in the Lavida's automatic transmission is quite common. Causes include aging or insufficient transmission fluid, degraded oil quality affecting hydraulic performance, leading to rough shifting. Solenoid valve or control unit failures are also possible, with clutch plate wear in dual-clutch models being a frequent issue, causing noticeable jerking during acceleration or deceleration. On the software side, the system may need updates or ECU data reset. Poor maintenance worsens the situation, such as never changing the fluid or aggressive driving. Prevention strategies include regular fluid checks, changing every 50,000 km with OEM-specified fluid, and seeking professional diagnosis at the first sign of jerking to avoid costly transmission overhauls, which impact safety. Safety first—don’t delay.
