Whooping type noise

[ttora4runner]

I noticed on my recent road trip (1200+ miles) that my 4runner has develop a whooping type noise. Kinda of like a unbalance washing machine but without the chucking noise and is a low type whoop. It can be heard at acceleration and deceleration but not at idle and it's not the tires.

I have an idea what it might be but I want to see what you guys think.

[20005spd]

check your wheel bearings :thumbup:

[arjan]

2nd the bearings, I got a bad one in the rear also.