Maintenance price of Dongfeng Peugeot automatic gearbox

Dongfeng Peugeot 408, including Dongfeng Citroen C4 and C5, is equipped with Aisin's 6-speed AT gearbox, model TF-70, which is a new generation of light electronic control automatic gearbox.

Multi-row planetary gear transmission is adopted, and high-precision hydraulic clutch control system is adopted to control the shifting and locking of the gearbox, which makes the shifting process smoother. The vehicle sent for repair is Peugeot 408, with a displacement of 2.0, and occasionally does not run. It is reported that the gearbox is not locked. It may be helpful for you to look at the disassembly process and internal structure.

The gear box assembly that is lifted,

The removed gearbox oil is also very black, so the gearbox oil should be maintained and replaced regularly.

The wire harness of the gearbox is connected to the valve body, and the wire connectors of the oil temperature sensor, the speed sensor and the solenoid valve are integrated. Remove wire harness.

There are various control solenoid valves on the valve body, including locking solenoid valve, shift solenoid valve and three-way solenoid valve. The computer transmits signals through wire harness and solenoid valve.

The solenoid valve above the valve body is something that many maintenance manufacturers are willing to mention. When they see fault codes such as solenoid valve failure and solenoid valve switch stuck, ask the owner to replace the solenoid valve. The solenoid valve is just a sensor. In most cases, there is a problem with the parts detected by the solenoid valve, not with the solenoid valve itself.

Wear of the valve groove inside the valve body itself will lead to pressure relief of the valve body? Cause upshifting and downshifting, if the wear is less than 2 microns, it can be remanufactured.

Remove the head housing.

The oil pump pumps and pressurizes gearbox oil to provide circulating power.

The internal structure of the dissected oil pump will be inspected one by one.

The differential can make the left and right (or front and rear) driving wheels rotate at different speeds. The differential is installed to adjust the speed difference between the left and right wheels.

The automatic shift control system of clutch gearbox can automatically connect or block the oil supply circuits of some shift clutches and brakes according to the load of the engine (throttle opening) and the running speed of the car, so that the clutches can be combined or separated and the brakes can be braked or released, thus changing the transmission of the gear transmission and realizing automatic shift.

Check whether the internal clutch plate is worn. Wear will affect the engagement ability of the clutch, causing slippage, so check and replace it.

The master will carefully check all the accessories inside and replace all the accessories that cause the failure and the accessories that are worn and depressurized.

Then they were all taken down here, and I'm also talking about the abnormal noise here, because I've met many car owners with this problem before, so I want to say one more thing. Abnormal CVT box? One is the wear of bearings matched with the main and auxiliary pressure cylinders,

On the other hand, there is a stuck spring on the flywheel where the differential and gearbox are connected with the engine, and similar abnormal sound will appear when it becomes loose.

This article comes from car home, the author of the car manufacturer, and does not represent car home's position.