Ford F-150 Mechanic???

[CastAndBlast]

I have a 2010 Ford F-150 KR 4X4 79,000 miles.

Recently, I have noticed a slight knock in the rear-end when taking off from a stop. It does not do it until I come to a complete stop, then take off. Also, it doesn't matter how much I accelerate. Even just taking my foot off of the brake, I will hear it knock. It is by no means loud, but annoying.

The truck is still under warranty. So, I plan on taking it in when I have some time that I can do without it, but that will be a few weeks away.

Does anyone have any idea what it could be?

More as a "curiosity kills the cat" kind of thing.

[BuckSmasher]

U joints?

[WCB]

Does it only do it when taking off straight, or only when stopping then making a turn or either way?
U-joints are a possibility or maybe even the limited slip clutches??

[BowSlayer]

If it does it even if you just take your foot off the brake I would be it's a brake caliper sticking or something to do with the brakes.

[byrdman03cars]

You need to take it in and have the slip yoke greased on the driveshaft. Ford has a tsb out about it and if you are under 60000 miles it is warranty work.

[CastAndBlast]

Thank you guys, it does it when going straight or turning. Basically, right before it starts to move forward, it "clunks". If I do not come to a complete stop, it does not do it.

[Shiner]

You need to take it in and have the slip yoke greased on the driveshaft. Ford has a tsb out about it and if you are under 60000 miles it is warranty work.

Nailed it