I have an 04 Xfire 6 speed with 14k miles on it. I just bought it from car max and I noticed that sometimes when I'm shifting from 2-3, i get a low thud sound coming from behind me. It sounds like a basket ball in the trunk.

It doesn't happen all the time but does occur when I shift from 2-3 or from and hi gear to nuetral, so basically when I push in the clutch.

What would be causing this? My driving style or the car?

Oh and hi, I'm new to these forums