Reply to thread

It’s called cost of ownership metrics. To stay competitive, manufacturers benchmark industry standards to set maintenance intervals. You need to use discretion and tailor your maintenance to how your vehicle is used.

Do you also change your oil every 10,000 miles because that’s the maximum allowable interval under perfect conditions? I’d hope not.

As [USER=52062]@Old-Raptor-guy[/USER] stated, axles have not traditionally included drain plugs for almost a century. Particles in the fluid from normal wear are not going to cause a sudden failure; obviously you’ve never cleaned a magnet inside a differential. If there is metal debris large enough to cause damage then a bearing/component has already failed. It’s also not a big deal to remove the axle housing cover to clean it; that procedure is in the WSM as well.

The Ford Sterling 9.75 has been in production for over a quarter of a century. There is no “design problem”. Your statements are unfounded and simply ridiculous.

Maybe use some common sense that an 8 year old truck with 100k miles should have had the axle fluid changed well before that time and mileage. Especially if you bought it used and have no idea how it was used or treated by the previous owner.