For those who drive on a track, don't forget changing your axle fluid. They need to be changed way often than you would think.
I see these in the users' manual:
"When subjecting your car to high-speed or competition use, the axle fluid and friction modifier should be changed after the initial (first) hour of high-speed operation or if the vehicle is subjected to track or competition conditions; thereafter changing the axle lubricant and friction modifier every 12 hours (under these conditions). "
2014 Mustang V6 3.7L 6-spd manual, with MGW shifter, Airaid CAI, BBK shorty headers, Corsa Sport axle back, strut tower brace, JLT oil separator, GT500 differential cover, BG Synchro Shift II gear oil, Redline differential oil.