I've been hearing this noise for a while now, but over the past few weeks it has been getting worse. Since I have a very loud exhaust I have to put in the clutch and coast down my street. So when I do, I can hear a clunk type sound coming from under the car, that gets slower as my speed does. I replaced my axles not too long ago, not sure if that could have anything to do with it. Also my clutch has never been replaced. I did alot of research using the search but didnt find anything matching what this is. Is my clutch about to go? Can anyone help?

http://www.youtube.com/watch?v=7nzOPfRznJw

It took a turn for worst today.. some help please help! what is that noise? anytime you can hear it i am accelerating lightly.

 

Wheel bearing? Mine made a thump thump noise at times. Check for play by jacking her up, park brake on, and try moving each wheel with your hands at 9 and 3 on the tire, pulling side to side, then 12 and 6. If there is play - you got a bad bearing. Same for front wheels but make sure you lock the steering wheel before shes in the air.

 

sound coming from the front middle or rear?

 

it's very hard to tell, if i had to guess i'd say around the middle of the car???

 

How many miles are on the car? It could be a variety of drivetrain components that you'll have to eliminate one by one. Driveshaft? Wheel Bearings? CV joints (again)? Brakes?
Next time, try pushing the clutch in and out as you coast and see if that makes the sound go away. If it has an effect you can eliminate different parts of the drivetrain.

 

there are 87K on it as it sits. ok here the things i have replaced starting with oldest to newest, first around 40-45k i replaced rear hubs and spindles. I did an F22 swap arounnd 75K and a new transmission at the same time, but same clutch. Rear axles about 3k miles ago. and brake pads all the way around a few hundred miles ago.

 

Since several of the components are recently replaced, they are probably not worn out, but could be causing issues if not installed correctly. I've seen rear hubs go at around 45k miles, so that's another possibility. The only way to know for sure is to start diagnosing the problem and eliminate items one by one.

 

so start by lifting jacking up the rear and checking for play?

 

While you have the S jacked up, spin the rear wheels and see if you hear the clunk. I had the same problem, turned out to be my diff going bad

 

Yeah my diff. clunks after every normal shift. Like cruising shifts around 3-3.5rpm. I can't hear anything higher than that but I think it's because the gears are still tightly meshed at that speed. Think it could be the diff. needs reset? Or the axle nut needs re-tightened? Or a CV axle going bad?