Just two months after they went into service, Vancouver's new energy-efficient diesel buses have developed wobbly wheels.

Three buses were taken out of service, while 57 others had to have their wheel bolts tightened.Three buses were taken out of service, while 57 others had to have their wheel bolts tightened.
(CBC)

Greater Vancouver Transportation Authority spokesman Ken Hardie said three buses were taken out of service Tuesday when drivers noticed that the rear wheel nuts needed to be tightened.

The discovery comes as TransLink attempts to ease traffic congestion in the Lower Mainland region by trying to persuade more commuters to leave their cars at home and take the bus.

In a bid to avoid further problems, TransLink mechanics on Tuesday tightened the wheel bolts on the 57 new diesel buses that are currently in service in the city. All the buses will be back in service Wednesday, TransLink said Tuesday.

In January, TransLink withdrew its fleet of 39 electrical trolley buses from service for almost a month while the transit company's mechanics tried to figure out what was causing the vehicles to lose their power steering.

The trolleys were pulled out of service when some drivers reported a temporary loss of power steering at intersections.

At the time, TransLink downplayed the problem, saying that Vancouver's trolley buses are custom made and complicated, and every trolley bus the company has bought since 1948 has come with technical difficulties.