9064H of 179 has recently got a really weird sound. When the
driver floors the accelerator, a really strange sound kicks in
halfway. I dunno how to describe. It sounds like a very strong
engine echo.
It sounds a bit like 9128H in the past, before the engine got
repaired. But the only difference is that the sound occurred in
9128H whenever the accelerator was pressed. But in 9064H, the
"echo" effect kicks in only when the bus is moving. Most of the
time in the 3rd gear. But it doesn't seem to be fixed. It even
kicked in once during the lock-up gear, and another time, it only
kicked in in the 4th gear. When it kicks in there's a "psshhhhhhhh"
sound You can hear it very clearly if you sit on the lower deck
last row.
If anyone wants to try it out, tomorrow's the last day, when it the
bus is still paired with a pro driver, who floors the accelerator
everytime! 
Another bus is 9098K, which has been cameoing on 179/242 x-overs
recently. You can hear it both externally and internally. It sounds
like a high pitched washing machine... It even sounds like there is
water moving inside, like "shhhhhhhhh"! 
Anyone know why such strange sounds?
Also share your experiences with strange sounds!
