Knocking sound from steering

[07noxbomb]

Any insight is appreciated on this weird problem I'm having with my 2007 AWD equinox.

When I move the steering wheel slightly back and forth while in park, it makes this knocking sound but doesn't turn the wheels at all. Along with that, it vibrates when breaking with pretty new brakes and rotors. Another odd thing is it doesn't vibrate at all speeds of braking, just at the start of breaking when going 30 or above. It settles down as the car slows down. No vibration if I have to brake hard.

Here's a video of the sound and the movement that creates it. Any ideas? Is it something in the steering column? I saw some videos about tightening an Allan key on the steering box to fix this exact scenario, but I don't know where that is on the Nox or if it even has one of those.

New video by Ryan McGuire

photos.app.goo.gl

 

[cavell]

Could be plastic coupler inside elec. motor assy. Rarely fails.
Could be knuckle on intermediate shaft.
You can loosen set screw on knuckle assy and try to move it 1/8”-3/16 further up Splined shaft. Usually has no affect.
Could change elec motor assist assy. I did. Made 20% improvement.

 

[cavell]

Just got an 09 w/98k miles. Is SO quiet. No clunks or rattles on bumps.

 

[rawhite318]

I used to have a gmc Sierra and the same thing would happen with the shaking on stop. I can’t remember if the rotors or the breaks were bad but it was one of them. It took me forever to find it because both were new. I don’t have any idea about the knocking. I’m not sure if this is as helpful as cavell’s comment but it’s what I got.

 

[cavell]

I still blame the elec steeering boost motor under dash. I used to see them removed from junkyard vues. Vues use same motor. Never seen one removed from an equinox.