Changed the gear oil in two of my trucks this week.
2022 F350 6.7 4x4, installed PPE covers on both axles and changed the factory fluid at 35k.
-Front Dana 60 (limited slip) got 3.25 quarts of Valvoline Advanced 75w-90 with 3 ounces of XL-3.
-Rear Dana M275 got 4.5 quarts of Schaeffer’s Extreme Performance 75w-140.
2009 F150 5.4 4x4, removed covers and changed the factory fluid in both at 35k (yes, 35,000 miles).
-Front differential carrier got 1.8 quarts of Valvoline Advanced 75w-90.
-Rear Ford 9.75 got 2.75 quarts of HPL Differential Life 75w-110.
Wow that's low miles on the '09, extra vehicle?