Approaching 93k miles on my 2017 3.5L Ecoboost with the 10 speed. I want this thing to last me another 4 years or so, and there's so many opinions online and at shops on how to service these things so I wanted to ask you guys. Got it with 45k miles on it so I have no idea what was done before then. I barely tow. Below is what I've done so far.

Oil changed with full synthetic every 5-6k miles
Cam phasers replaced at Ford dealership at 61k miles
Transmission fluid flushed at 61k miles at 3rd party shop
Brake fluid exchanged at 78k miles at 3rd party shop
Brake master cylinder replaced under recall at Ford dealership at 83k miles, assuming fluid was changed again as well but not 100% sure

What should I focus on servicing/what is important for this vehicle approaching 100k miles?

 

Coolant and differentials.

 

Anything else? How much would you estimate the coolant and diff services to be?

 

Do the diff service yourself for about $50.
Last time I priced coolant (a couple of years) it was around $200.