Chaning Differental oil ???
Have an 03 F350, 90K miles, how often should the diff. oil be changed ? Ford lists the oil that came with is as synthetic. We do about 1/3 towing and the rest around town. Thanks
Forum Discussion
2007 F-150 sig pic had about 170K miles, daily driver and towing. I changed it because the diff cover was showing signs of rusting through. Fluid was dirty of course, but no obvious shiny chunks. Gears looked like brand new.
