A little while ago my suzuki started making a rhythmic grinding from my driver's side rear tire. Rhythmic in the sense that when Im speeding up the rhythm picks up. So, we figured it was the wheel bearing needing to be replaced. Well- we're still in the process of fixing it, however now my rear tire is leaking break fluid- as in, I do not have any tension on the breaks because its empty. Im a single mother. I know how to change break pads, rotors, oil filters, etc etc. but Im unfamiliar with rear wheel drums and wouldn't mind learning about them- not only because its interesting, but also because Im pinching pennies at this point. Do I need new calipers? is this a hard process? Please point me in the right direction.