Rear end vibration

Good afternoon,

Yes, it could be an out of round rotor.

https://www.2carpros.com/articles/how-to-replace-rear-brake-pads-and-rotors

Are the airbags working keeping the car level?

Roy

I checked the rear rotors and they are true, I replaced the air bags with coil springs. It still makes the same vibration. Could it feel like the rear if the front rotors were out of round.

No, it will not.

Did you remove the driveshaft and make sure the U joints are not seized?

Roy

It looks like my new axle is bent. I saw movement in the driver rear wheel when i jacked the car up and put in drive. I took the wheel off and still saw the wobble in the hat of the rotor.

Okay, it could be the flange is bent at the end of the axle.

If you remove it, roll it across the floor and if it is bent, it will not roll evenly.

Roy

What else could make it look like a bent axle? The rear rotors have been trued.

The housing itself. I doubt that is the case.

Roy

I’ll try to take a video of them, I just swapped out the axles this morning and it seems better but still does it.

Try and upload it to this post for me.

Roy

Could the driveshaft cause wheel hop?

That was the next thing. If you have a driveshaft out of balance, it would do it.

Roy

Here are the videos:

Great videos.

Remove the driveshaft and make sure the U joints are free to move.

The first 2 are good.

Roy

The driveshaft is balanced, the only thing left I can really think of is the differential carrier or axle tubes.

And one of the u-joints was a little difficult to move, so I replaced it and had it checked and it balanced out.

Looks like it is the housing itself. Very rare that is a failure unless there was an impact.

Roy

Could the spider gears cause a hop? I noticed on the videos I took of the wheels they both would hop once per revolution or couple revolutions. The passenger side seems to do it more frequently.

It could be bearings in the differential. I doubt the spiders as they would make a lot of noise.