Noise problem 30+ mph

Hello,

Had this 09 taco 4x4 off road almost a year and no mods on this car. The past couple months its been making this humming noise if u accelerate past 30 to 80 mph and not only that, if u let go of acceleration, it feels like it vibrate and louder noise. Can't really hear it if u roll down the windows but if u turn off radio and roll up ur windows u can slight feel it and hear it. On the passenger side u can feel the floor vibrate. I grease up the drive shaft and check t-case and rear diff fluid. Took it to dealer and they say there was nothing wrong with it, its probably just your tires. So, i bought new tires and install them thought that the noise will go away, but not a chance still has the same noise. Don't know whats wrong with it..... Any suggestion???

 

Mine seems to be doing the same. Last time I greased my u-joints rusty water came out. I assume it's that or the carrier bearing.

 

I think you found the problem. Rusty water means your needle bearing have rusted and the u Joints need to be replaced. After replacement you need to grease them more often.

 

indeed, had the same issue with my front bearings.