A 2004 Peugeot 307
2.0 with mileage of about 180,000 km, matching AL4 type electronically
controlled 4-speed automatic transmission. This car a month ago had a sense of
frustration when lifting gear, transmission fault indicator occasionally lit,
after lighting the car driving difficult (should be locked third speed's
reason). Because the failure phenomenon is not frequent, so there is no timely
maintenance. Continue to use for some time, in recent days when driving fault
phenomena become frequent.
Firstly,
maintenance staff use lexia 3 pp2000 to diagnose the car control system, in the
automatic transmission control system detects the fault code meaning of
hydraulic solenoid pressure regulator valve failure. Maintenance staff first
check the oil level and oil quality of transmission oil, found oil has gone
bad, and accompanied by burning smell, indicating transmission internal
friction elements have been burned. Then maintenance staff removed the
transmission from car. After dismantling examination, found almost all of the
friction plates all burned, also still forward gear worn, brake band broken,
reverse gear brake band and brake drum wear and so on phenomena.
Given the burning
extent of the automatic transmission, maintenance staff replaced the
transmission overhaul package (including friction plates), the main hydraulic
solenoid valves, clutch pistons and brake band and other damage accessories,
renovation the torque converter and cleaning valve body.
After the work is
completed, the transmission assembled in accordance with standard processes.
Again use lexia 3 diagnose the car control system, no fault code,
test the car, everything is normal, troubleshooting.
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