Ive got a 2015 F150 XLT 4x4 with the 5.0 and 6 speed transmission. Im at 102,000 miles and due to change my oil at about 103,000. Im also planning to change my sparkplugs with some Motorcraft ones but was wondering if I should also consider changing my transmission fluid, transfer case fluid, or rear diff fluid and if not when should I? Also my waterpump was replaced last year by the scummy dealership I bought it from but I dont think they flushed it but just re filled it. Would them not flushing it change when I should plan on doing so in the future, I plan to keep the truck for at least 10 years. Ive had no issues and everything runs great but want to make sure everything is maintained properly. Thanks
your owner's manual should have a chapter for all that.
If it were me, and they weren't done before, I would do all those things. Don't forget front axle, and grease the zerks.
