Thumbing sound from rear tires

for almost an entire month, the car was emitting a funny thumbing sound from the rear, the mechanic detected a rubber that was off the central bar leading to the rear wheels, after changing that, the sound did not go away completely, i was then told it must be my tires, afterall it's been almost 3 years, so i decided to change that and guess what the sound did not go away, it became louder, then finally over the weekend, they told me my bearings in the rear wheels are gone....while they were at it, they found a loose joint at one of the bars too and that had to go...along the way replaced a few fuel hose, and engine caps....now the ride is sweet again!!1