I changed the rear axle gear oil in my 2014 F250 this week. I bought the truck used with 23k miles on it and now it has 43k. I assumed that it wasn't done before, but the bolts looked like they had never-seize on them and the fluid was relatively clean looking. During my change I used a Luberlocker gasket (no RTV needed) and a new Dorman diff cover.
I added nearly 4 quarts of Amsoil 75w-110 Severe Gear gear oil, which is roughly the same amount that drained out (about 3.5) to get to the point where it just dribbles out of the fill hole. I could have sworn that the owner's manual and Amsoil recommends synthetic 75w-110 but I read it wrong. Its 75w-140.
My truck is a daily driver mostly. I tow occasionally but limited to no more than 10,000lbs and maybe a few times per year at most. When I do tow, its at reasonable speed and usually local, but will be towing up to 150 miles on the highway this fall.
What does BITOG think? Dump it immediately? Run it until the spring and then change? Forget it and drive till the wheels fall off? I'd rather not waste expensive fluid like that, but don't want issues with the rear end either.
I added nearly 4 quarts of Amsoil 75w-110 Severe Gear gear oil, which is roughly the same amount that drained out (about 3.5) to get to the point where it just dribbles out of the fill hole. I could have sworn that the owner's manual and Amsoil recommends synthetic 75w-110 but I read it wrong. Its 75w-140.
My truck is a daily driver mostly. I tow occasionally but limited to no more than 10,000lbs and maybe a few times per year at most. When I do tow, its at reasonable speed and usually local, but will be towing up to 150 miles on the highway this fall.
What does BITOG think? Dump it immediately? Run it until the spring and then change? Forget it and drive till the wheels fall off? I'd rather not waste expensive fluid like that, but don't want issues with the rear end either.
