Main thing is to try not to strip the plug out at any cost, then it will be a major pita. You gotta be dealing with mostly hacks whoever does your work...you must gravitate toward them to have so much grief. They probably slapped that plug in with a impact wrench set to 90 ft lbs.Well damned be the guy that over torqued this 60k miles ago
I could not get it to budge
Rust should not be much of an issue or I cannot see it
Soak in pb blaster and get air impact out on Saturday and save 106$ minus cost of diff gear oil