Car: 2018 1.5 Prestige Auto
Join Date: 13th May 2008
Thanked 8 Times in 7 Posts
I did mine a few weeks ago, and it's not difficult. Once you remove the under-body tray, you will see the drain plug at the bottom front of the gearbox. It takes a 3/8 inch square drive. About 3 inches above it is a smaller bolt, which is the level plug - remove this and fill the gearbox until oil comes out.
The filling plug is located on the top of the gearbox, and is accessed by removing the air cleaner. It also takes a 3/8 inch square drive.
Don't forget to replace the copper washers on the 3 plugs. And I suggest you use genuine Honda gearbox oil. I was surprised how much smoother and lighter my gear changes were after the change.