Last night while driving home I was doing about 60mph when I let of the gas a bit to slow down and a muffled rattling/thumping noise started from what I believe to be the clutch/transmission area. It stops after a few seconds but I can feel the thumping better then I can hear it. I tried letting off the gas with the clutch in and I didn't get the noise. Also, I think I have hear the same noise just driving around town but it may just be my paranoia picking up on any noise I hear. Anyone have a similar problem with their clutch?

The car has 14,500 miles on it and due for the 15k service soon.

Also, the car has devloped a lean to the left, both visually and the wheel gap on the left is smaller then on the right side. I wonder if this might be related to the noise that I been getting?

 

I don't think it's your clutch. Most likely it's your suspension (or motor mount possibly). My wife has a fugly 84 Volvo 240 and she just had a bunch of work done to fix a problem similar to yours (Gee...aren't Volvos and Hondas just alike?!?!). She had a broken motor mount, broken control arm, & .... a bunch of other stuff. Anyway, you sound like you're under warranty, take it to the dealer and tell 'em to fix that ish.