Tools and materials required to replace the automatic transmission drive oil seal on a Peugeot 307:
* New automatic transmission drive oil seal
* Set of keys and sockets
* Flat head screwdriver
* Sealant
* Brake cleaner
* Bucket or pan for draining transmission fluid
Guide to replacing the automatic transmission drive oil seal on a Peugeot 307:
1. Preparation
* Raise the front of the car with a jack and secure it with stands.
* Drain the transmission fluid from the gearbox into a previously prepared bucket or pan.
* Remove the drive shaft from the gearbox.
2. Removing the oil seal
* Use a flathead screwdriver to pry and remove the old oil seal. Be careful not to damage the oil seal seating surface.
* Clean the seating surface from any remnants of the old oil seal and sealant.
3. Installing a new oil seal
* Apply a thin layer of sealant to the outer edge of the new oil seal.
*Insert the new oil seal into the mounting hole using a suitable mandrel or socket.
* Tap the seal around the edges to ensure it is firmly seated.
4. Installation of the drive shaft
* Insert the drive shaft back into the gearbox.
* Screw the drive nuts with a torque wrench to the required tightening torque.
5. Refilling transmission fluid
* Pour transmission fluid into the gearbox through the filler plug.
* The fluid level should be within the range of the indicator on the dipstick.
6. Completion
* Lower the vehicle and let it idle for a few minutes to ensure there are no leaks.
* Check the transmission fluid level and add if necessary.
* Clean the area around the oil seal of excess sealant.
Notes:
* It is recommended to replace both drive seals to prevent future leaks.
* Use only transmission fluid recommended by the vehicle manufacturer.
*If you do not have experience with automatic transmissions, it is recommended that you have a qualified mechanic perform this task.