Roar noise and slight vibration going over 40 mph

[MiMada]

My Armada has 40,000 miles and had new brakes and new rotors (front) and ABS sensor changed last week on separate visits. Since then I noticed an odd noise on and off and now more frequently as soon as I go over 40 mph accelerating...thought it was the A/C which sometimes when very hot outside makes a whining noise (not same noise as new one described herein)...so I turned a/c off...the deep roaring sound continued. It stops when I drop below about 40 and does not occur till I pass that speed again. It does not occur every time but often and the car feels odd like there's an all over vibration along with the deep roaring noise which sounds like it's coming from the front end somewhere or under the middle area but I am not sure where it's from. It got really intense a few times so far yesterday and today and other times it's minimal and hard to hear. It does it in lower temps too like today it was only 78 out. Any ideas? I have noticed a little odd (clunky) shifting when giving gas at the 40-50 mph range recently too and it clunks often when parking it and shifting to park, drive or reverse even though I am FULLY stopped. The rpms look ok during all speeds but could this be a problem going into overdrive? Does anyone know at what speed overdrive kicks in? I am a little concerned for safety as I had a brake failure once already (long before the ABS sensor repair problem of last week). This doesn't seem to be a brake thing but it does feel a little draggy like the car is being held back somewhat. Could they have messed up something installing the new rotors and brakes and/or ABS sensor?
Thank you so much. Deanna

[mpe235]

Sounds like a bad front wheel bearing. It is pretty common on the armada. They are covered for 5 years/60000 miles and they come with new abs sensors in them.

[NissanTech]

I agree with mpe235, specially if the problem started after the rotors and ABS was replaced.

[MiMada]

wouldn't that happen under 40 too if it were a bad bearing?...and on turns? It's not a tick or clunk in any way...just a roar and vibration that gets very loud at some times...please answer back...is it dangerous? I had a bad one in another truck years ago but it was a clunky kind of sound (like a ticking noise)...
I am going to try to take it in for them to listen tomm..I've got a good service advisor over there at my dealer and he actually did mention that on the phone...

[sergey85]

maybe your tire or tires need to be balanced

[mpe235]

Originally Posted by MiMada

wouldn't that happen under 40 too if it were a bad bearing?...and on turns? It's not a tick or clunk in any way...just a roar and vibration that gets very loud at some times...please answer back...is it dangerous? I had a bad one in another truck years ago but it was a clunky kind of sound (like a ticking noise)...
I am going to try to take it in for them to listen tomm..I've got a good service advisor over there at my dealer and he actually did mention that on the phone...

Bad wheel bearings usually start making noise at higher speeds and almost always make a growling noise. I have never seen one that makes a click noise. It could be dangerous, the bearing is probably making noise because it is loose. You can check it by jacking up the truck and then grab hold of the top and bottom of the tire and try wiggling it.

[lmerney]

I have also experienced my Armada vibrating, but not until I reach about 70 MPH. It is very disconcerting while you are highway driving. I have had the rotors replaced twice in the last 2 years (for brake judder problems), brakes changed and a wheel alignment, yet the problem still exists. Perhaps this is a wheel bearing problem as well??

[sergey85]

it could be a wheel bearing an easy way to check is to jack up one of wheels and move it sideway if u get any play then wheel bearing might be your problem then repeat the same for all the other wheels.now do u get this vibratiojn when u are braking or just driving?

[lmerney]

Just driving. I WAS getting the vibration before, but had my rotors shaved (again) and this seemed to get rid of the shaking during braking. But, of course, it still happens when going around 70 and increases and speed does.

[nistec]

Take a look at the drive shaft while they are at it. It could easily make a clicking noise when shifting while the vehcile is not moving.It could also cause the vibration.

The roar may be tires or a wheel bearing. does