I have noticed that in some or even most of the OAC hispano
0405s, there is this very sickening wailing sound at the last gear
of the engine. Whenever the bus accelerates to the last gear and
starts cruising, the wailing is like, well, so irritating. A
minority of the OAC 0405s and ALL
of the CAC 0405s have no such sound. Also, the volgren ones dont
have the wailing engine. Why is this so. I think most of the
wailing 0405s are in SMRT AMDEP, as 851,852,854,171,167 have
wailing 0405s. I really hate the wailing.
