Hey Guys,

Last week my car has developed a clicking noise from the rear that has gotten progressively worse, and it is at the point now where at speeds above 40mph, I can hear the clicking much louder than the engine.

Brief breakdown of what's going on:
-Sounds like "card in a bike spoke" type of clicking, about 5 clicks per wheel revolution.
-Clicking is directly related to how fast the car is going, not which gear it is in
-Clicking only audible during acceleration (goes away when not accelerating, not audible if coasting), and is audible accelerating at any speed.
-Clicking sound much louder at speeds above 40mph
-Briefly inspected under the car's rear for damage, found nothing visible

After searching the many "clicking rear end" posts, I don't think my symptoms necessarily line up directly with a bad diff or cv joint.

Also I must preface by saying that I did knock my passenger rear wheel a couple weeks ago pretty hard on a storm drain, maybe at about 1 or 2 mph, but it definitely took a hit. Car drove fine for a day or 2 afterwards, and I can't tell if my problem is correlated.

My questions are: if it is a diff or cv issue, do those symptoms occur and become greatly pronounced within a week's time? Or, if I did damage my wheel, what are some possible issues that may have occurred to that correlate with the symptoms described above?

I'm taking it to my mechanic monday, but I'd like to be armed with some knowledge before going there.

Thanks for any help guys, I really appreciate it!