An exhaust leak could do that.
A front or rear hub bearing assembly going bad could sound like that.
Could be universal joint is finished. A bad flex disk
the cause of this is probably a bad u joint
It could be that the back tires brakes are rusted and need new replacements or just need oil.
Your rear tire could be making a knocking sound for a number of reasons. You could have a damaged strut or axle that needs replacing.?æ
check the drive axles they could be bad
This could be caused by something loose in the duct, or a worn or broken plastic part, etc.
you re rear axle i just replaced mine it probably the front pinion bearing
It could be that the connector wire broke in the rear. It happened to me.
need to know the year That sounds like it could be a wheel bearing or main axle bearing.
u knocking on it
You may need differential fluid...check that.