M37x vibration brakes etc issues

[fuzzysig]

2011 m37x
Having mistery vibration..
and its turning into a money pit.

every time i do something it slightly fixes a problem and a new one shows up somewhere else
Thought that driver front tire was unbalanced,
Rotated wheels slightly less vibration
vibration when braking showed up
Changed pads and rotors
Vibration moved to pass side
And now both front brakes sound like uneven rotors.
But new rotors look evenly broken in
No high spots on either side but i hear intermittent hissing when i roll

Also when driving on freeway i can feel slight vibration all the time and very noticeable at 81mph-about 90mph

Driver wheel bearing is new
Passenger bearing doesnt feel worn out and therr is no bearing hum

[squeefoo]

There could be a bad brake hose or a seized caliper.
Another thing is potentially the ABS unit engaging from a bad sensor, poor ground, or brake pressure sensor.
-that could be the reason it moves from side to side.

On mine the doofus that put rear brake pads in at the stealership just hammered the rear shoes in so they wouldn't slide and release when the brake was off. Found it right after I bought my 2012 G37XS.
That was causing a vibe too.....and a very touchy pedal.

[fuzzysig]

Might possibly have bad bearing and lca ball joint on that one
Have to check. just remembered that wheel hit open manhole in my work parking lot few months ago.
anyone know if the property owner would be responsible for repairs? The manhole was broken so when i drove over the cover slid and hit the car.
2 weeks later they fixed it.

[fuzzysig]

this is getting better and better.
Now im hearing grinding/hissing sound from driver side when i turn(roll around the corner)
But that side has brand new wheel bearing

i would say the chances of me getting 3 defective parts at once is rather low.
I want to go back to fixing honda cars. At least when something is broken its obvious and easy to find.
And it doesnt move around lol

[fuzzysig]

Ok so i replaced rotors again
And replaced both wheel bearings.
And still same noise from brake pad making contact with rotor
at least thats what it sounds like

But when i turn it sounds like grinding
Even slight turn sound increases

The brake fluctuation is almost gone but still there very faint.
Tires are balanced

[fuzzysig]

2 months later
still same noise
I took it apart multiple times already
Nothing is making contact except the pads
Im lost, never had this issue before.
I rebuilt entire cars from bare bone so im not new to mechanical work
Just new to nissan
Is there an issue specific to these breaks systems that i dont know about?

[fuzzysig]

still cant figure it out.
took everything apart and back together like 6 times and there are still no visible marks of metal to metal contact but when i drive its very noticeable now that its a metal to metal every rotation of the wheel.

i can feel the drag every time the noise is there.
brakes also drag and when noise happens.
gets louder when i turn at low speed

i have no idea what else can it be?
everything is brand new.
pads rotors wheel bearings

[VStar650CL]

Have you checked the parking brakes? Your '11 has "tophat" type parking brakes where there are drums with shoes hidden inside the hubs of the rear rotors. They cause rattles more often than scraping, but they certainly can and do cause untoward noises.

[fuzzysig]

yea i had someone roll the car for me and press the brakes. its definitely coming from front wheels.
but even with that i cant pinpoint where the noise is coming from
i dont see any place where rotors or pads or springs are making contact when i take it apart.
i thought it was the springs but i can feel the drag when i roll or when i break
it started right away after replacing rotors and pads.

[Yoda's Master]

you tried replacing the caliper and lines? maybe front diff is shot? axles shot? you got aftermarket wheels?

[fuzzysig]

stock everything.
i checked calipers and greased them up
the hissing noise started right after replacing rotors and pads and never went away its been a year since i replaced the front rotors and pads and i can still hear the hissing.
replaced both wheel bearings about 6 months ago and pass side was already overheated again. so i replaced it under warranty just last week. havent looked at the driver side bearing yet.
bought a mercedes as a daily driver so i can fix this one and now fixing the mercedes and driving this one because mercedes broke after 2 days lol.(should have known better)

[Yoda's Master]

lol. try replace the hose. it's pretty old already and probably starting to get blocked.

[TouchofClass]

Have a look at the steering gear rack. Look for power steering fluid leaks around the steering gear. I had similar symptoms as you and found this to be the issue. Hope you find the culprit.

[Q70sGuy]

Hi

Two simple but often overlooked things. I mention these because you specifically mention issues after replacing brakes.

The brake dust shield was slightly bent when you did your brake job. Easy enough fix, just push it back away from the rotor, don’t forget to do the bottom of it as well (you’ll need to lift the car or remove the wheel)

You didn’t clean the hub well enough before installing the brakes. Anything behind the disc will cause it to run unevenly. Even a tiny piece of rust.

That’s all I can think of. Good luck

[squeefoo]

Somebody put gravel in your hubcaps!

[fuzzysig]

a little update.
found that one of the rear calipers was stuck.
went through all of them and clean/re grease.
vibration is finally gone.
and i got about 1.5-2mpg improvement from having no drag on the wheel.

but the car still eats through front wheel bearings adn still has that metal to metal contact noise when low speed and braking. from the front

[squeefoo]

Thanks for the update.
at least you fixed part of it.

[Dbarry]

When we took the M35 to the shop for the mounting and balancing of the new tires from 4Wheelonline, the mechanic noticed a small rock stuck between the roto and heat shield. The heat shield was also bent.

[anewstartinchrist]

2011 m37x
Having mistery vibration..
and its turning into a money pit.

every time i do something it slightly fixes a problem and a new one shows up somewhere else
Thought that driver front tire was unbalanced,
Rotated wheels slightly less vibration
vibration when braking showed up
Changed pads and rotors
Vibration moved to pass side
And now both front brakes sound like uneven rotors.
But new rotors look evenly broken in
No high spots on either side but i hear intermittent hissing when i roll

Also when driving on freeway i can feel slight vibration all the time and very noticeable at 81mph-about 90mph

Driver wheel bearing is new
Passenger bearing doesnt feel worn out and therr is no bearing hum

I'm not sure if you are still active but I don't know why I haven't replied to this sooner because I've come across your post before. I truly need everyone's input. I have a 2012 M37x with the exact same symptoms. I've replaced all four tires, both front wheel bearings, the front propeller shaft, and have had the tires rotated and balanced multiple times. This week on Wednesday when leaving work, I noticed a grinding sound when braking and it was pretty bad at slower speeds or at slow stop and go speeds. Definitely sounds like metal on metal. This is on top of the vibration issues like yours. But I have the same symptoms...the vibrations in the front and throughout the body in the same speed range, the vibrations in the steering wheel/body and the noises(sounded just like a bad wheel bearing and felt like warped rotors. I plan on checking the entire front end after work.