Guys, Just contemplating the 75k mile service on my 2010 LR4. Beyond the aggravation of having to buy exorbitantly priced fluids from wherever, I though I would reach out re. ease of doing fluid changes on rear diff and transfer case. Obvs easy enough, but I am in Toronto and we have salty winters. Have horrible thoughts of stripping the plugs when trying to remove them (after applying heat and WD40). Transfer case is aluminum - correct? Anyone from a northern climate done this re. any issues getting the fill / drain plugs undone?