Transmission oil/ Gearbox fluid change on 2010 Mazda 6 GH

Today I will do a 75w-80 GL-4 gear oil change on my (2010 Mazda 6 GH) 6-speed manual gearbox.
Sludgy surprise included.

Gear oil link: https://www.ebay.co.uk/itm/111894120349


Disclaimer:
Due to factors beyond the control of Klavs, I cannot guarantee against improper use or unauthorized modifications of this information. Klavs assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. I, Klavs recommend safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of Klavs, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not Klavs.