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I have had several Ford Eco-Boost engines for 6 years. Once mileage gets above 20k mileage improves. I do a lot of highway driving and am getting 23-24 MPG. 2021 FX4 29K

My 21 Stock FX4 started out at about 19MPG. Now with 20K miles, at 75MPH I am getting 24.9 MPG on Highway

You may want to look into this... I did it on mine and it is silky smooth. How To Lubricate Your Driveshaft Slip Joint

I just performed this maintenance item this weekend. Have driven the truck about 35 mines since and the occasional thunk/clunk is gone. Thanks for the tip and the video.

My Ranger finally was making the squeal consistently so I took it to the dealer for a test drive with a tech. Tech agreed it was rotational. They found the right rear wheel bearing race had separated. They replace the race, bearing, and service rear differential. Just picked it us an quiet...

That sounds good to me!

All good since the AC Pump change? Mine has been quiet since my last post.

That is great news. Calling the dealer today.

Great!

Any new news on your front? After I got back to the state, it squealed. It hasn't had as much as a chirp since. I didn't change a thing, and it has been about 400 miles. BTW I am at 12,830 miles

I have been out of the state the past 10 days so I have not been driving it. Drove it today no change. Let me know what they say. I may end up doing the same.

Agreed.

Mine is exactly the same as yours.

Still doing it. I am going after the drive shaft next.

Thanks.

I still have original exhaust and am still getting the squeal. Agreed on the speed

Update... Nothing was identified in the exhaust system. The squeal was seemingly getting longer duration and all times of the day. Dealer cannot duplicate. Because the sound was coming from the rear I decided to take a look around. I considered the chain attached to the spare tire because...

Thanks for your reply. No aftermarket changes...100% stock. Will look into your suggestions right away. Thanks for the help!!

I have a 2021 Absolute Black Ranger. LOVE IT! Here is the situation, it is 4x4 with about 8500 miles. My drive to work in the AM involves about one-half of a mile before the on-ramp to the freeway. The ramp up the highway is about a 2.5 degree upslope. The drive to the on-ramp has no issues...

Absolutely love mine