Can someone lend me a great mechanic's ear on this one?:

https://www.youtube.com/watch?v=ECWN2yScReY

Video is of the rear diff from under the car. The sound is most pronounced after getting up to speed, then letting it coast in neutral. Recently drain/filled diff fluid with Amsoil and no metal particles were found. Car has 126K miles on it.

Many thanks!

 

Are you sure the sound isn't more pronounced by the transmission?

See this thread:

https://www.s2ki.com/s2000/topic/105...#entry22852370

 

Thanks, I think it might be different, as we were able to pinpoint the sound to the diff area, around the axle areas. Hard to be sure, though...