Possible malfunctions of the automatic transmission in the Peugeot 408:
1. Slip:
* Gear changes are delayed or skipped.
* The vehicle does not accelerate properly or is slipping.
2. Rough gear shifts:
* Gear shifts with shocks or vibrations.
* There is a knocking or grinding noise when changing gears.
3. Inability to change gears:
* The gear selector does not move or is difficult to move.
* The car remains in one gear and cannot change to others.
4. Transmission fluid leak:
* A puddle of transmission fluid was found under the vehicle.
* Low transmission fluid level on dipstick.
5. Overheating:
*The instrument panel displays a transmission overheat warning.
* There is a burning oil smell coming from the transmission.
6. Electrical problems:
* The gear indicators on the dashboard do not light up.
* The transmission does not shift due to a faulty electronic control unit.
7. Wear of mechanical components:
* Worn friction linings, solenoids, or other mechanical components can cause a variety of problems, including slipping, rough shifting, and inability to shift gears.
Causes of malfunctions:
*Low transmission fluid level
* Contaminated or old transmission fluid
* Worn or faulty components
* Electrical problems
* Overheating
Diagnostics and repair:
Diagnosis of a Peugeot 408 gearbox malfunction includes:
* Checking the level and quality of transmission fluid
* Computer diagnostics using OBD-II scanner
*Checking mechanical components such as friction linings and solenoids
Repairing an automatic transmission in a Peugeot 408 may include:
* Replacing transmission fluid
* Replacement of worn or faulty components
* Repair or replacement of the electronic control unit
*In some cases, a major overhaul or replacement of the transmission assembly may be required.