Open the hood of your Peugeot Boxer 2.8.
Locate the gearbox. It is usually positioned near the front of the engine, below the air filter housing.
You will see the gearbox oil filler cap on top of the gearbox housing. It is usually marked with a "GB" symbol or a dipstick with the word "Oil."
Remove the oil filler cap by turning it counterclockwise.
You can now add or drain gearbox oil as needed.
Make sure to replace the oil filler cap securely when you are finished.
This guide can help you find the oil filler cap for your Peugeot Boxer 2.8.
