clunk

Noticed tonight that when shifting into or out of reverse (A4, open rear)that there's a clunk, the sound comes from the rear. Differential fluid was changed a couple months ago. Also if I have my left foot flat on the floorboard when I'm driving I can feel a bunch of little vibrations and shakes mainly when going over bumps, this has always happened tho so I don't think much of it. John (Formula) is coming up Saturday and we're doing a gear swap, so I'm gonna be back there anyway. I did a search on camarov6.com boards but found no definite answers besides check u-joints, which I'll do later or tomorrow. If it is u-joints, how much is it to replace them? and can I do it myself, or do I need to take my car in? What else may it be?

OK just checked u-joints, they seem to be fine. went for a little drive to check the trans mount by seeing if theres a clunk when i stomp on the gas, well it did it once as i was leaving the driveway and stomped on it... then didnt do it again. I'm also noticing a lot of little metallic rattles that are coming from the middle/rear, bottom of the car when I go over bumps. These rattles happened a while ago along with a clunking when I turned right, shop replaced the control arm (i think) and it was all fine. :shrug: what should i do now?

smebody?????????

I would give a suggenstion as to what to check but I am going to be there in like 9 hours so I will just say wee will take a look.