I just heard this noise...sounds like a rear wheel spin in gravel but only for about six inches..ok...may be a fart noise..but just a routine start up after driving a bit.
When this happened I was on dry pavement. It has done this 2 times in the past week (I just got back from a 1500 mile trip with no problems at all.) anyway, I want to be pro activebut have not a clue where to start...thx