Vibration / Grumble

[JETTIX2]

2005 LX470.

New tires and wheels, rear pads and rotors, fronts are good. 112k.

Slight vibration/grumble at highway speeds. I an feel it as soon as I exceed about 60mph UNDER THROTTLE. Feels like a bad wheel bearing. If I lift off the throttle, grumble goes away briefly but comes back once the truck starts to decelerate under engine braking. Turning makes no difference.

Shop who did LF wheel bearing said the RF was fine, they could detect the noise while driving the truck but could not pinpoint where it was coming from. They said to drive it a bit and once it got worse, they could figure out what was wrong. LOL. More of a grumble vibration than an an audible noise. All fluids checked out fine underneath.

Any thoughts? I've put 4000 miles on it since the repair, but have a 1000 mile trip I'd like to make in April and don't want to have any issues.

Thanks, Ben

 

[neoworm]

Maybe check your driveshaft u-joints.

 

[12guns]

I second checking the driveshaft and U joints.
Not to alarm you, but I did have a Tacoma rear end go out that would make noise on acceleration, but not coasting. As it got worse, it turned into a loud whining and I had to do a full rebuid.
Have you serviced the rear diff before? They get over looked from time to time so I thought I'd mention it.

 

[marshotel]

Occam's razor says: You need an alignment.

 

[bluecruiser]

I had very similar symptoms due to a dented driveshaft. Off the accelerator above 60 and there was a grumble. Just had the DS retubed and now it's all smooth.