nancycamb

after driving about an 1/2 hr or so the passenger side rear develops kind of "thumping" noise. has new shocks/struts. tires/wheels are fine. nothing in trunk. mechanic cant find it
the cat and the muffler seem ok. Its NOT a rattle.
could it be something IN the muffler?

help!!

thanks,

nancy

Turbonut

iTrader: (1)

If it hasn't been done, switch tires from side to side or front to rear to see if any change.

mazdaverx713b

iTrader: (91)

Is the thumping noise consistent with speed or is it heard over bumps? Had the rear differential mount been checked?