[downwind4final]

08 Si coupe 200 mi-

When I'm coasting in neutral, out of gear or clutch in, I can hear a slight "wum wum wum wum" noise coming from the trans that is relative to speed and goes away at about 15 mph. Is this normal?

 

[ley]

yes. welcome to honda.

 

[Duce2k]

Your car is new let it break in for awhile, that noise may be normal, it could also be tire noise

 

[nayilsi]

weird.... i never hear anything while coasting in neutral. I do hear lotsa other thuds thunks rattles and pops though.

 

[Whocares05050]

More than likely the tires

 

[downwind4final]

I'm certain it's from the trans, not tire noise. It is non-existent when in gear.

 

[schreff]

My 07 Si Sedan does that too. When in neutral, first, or 2nd gear and coasting, you hear gear whine. I also had an 06 Si Coupe that did it as well so I chalked it up to normal. The odds of both my Si's having bearing/gear problems with less than 5000 miles on em' for me... nah, has to be normal.

 

[downwind4final]

I'll try to test drive another one and se if it does it for piece of mind.

 

[NIGHTHAWKSI]

I'm certain it's from the trans, not tire noise. It is non-existent when in gear.

maybe it is there but you just can hear it over the noise of the engine when in gear.
i say its the tires also.