When accelerating there is clunk and hard jerk in the rear of the car?

KGOOLSBY1

MEMBER
2013 FORD FUSION
2.0L
4 CYL
4WD
AUTOMATIC
153,000 MILES

When I'm going down the road at any speed usually, I have on my cruise control and if I go to accelerate hard, say to pass somebody on the interstate, there's a real hard jerk in the rear of the car every time. It sounds just like it does if you're pulling a trailer and it gets a little slack in it and you move forward fast enough, and it just falls back into place.

Tuesday, August 8th, 2023 AT 6:30 PM

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
54,137 POSTS

It sounds like you have a rear CV axle that needs to be replaced. Can you please shoot a quick video with your phone so I can hear the noise? That way I can tell for sure what's going on. You can upload it here with your response. Here is what I think it could be in the images below. I have also seen the Viscous Coupling device go out and cause this noise as well. I would do a gear oil check in the rear differential as well, please check the center support bearing as well.
Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.

Images (Click to make bigger)