Rob_Rocker
New Member
Driving a brand new Thomas with a Cummings B6.7 engine
. I currently have 2.5k miles on it and from the beginning when traveling between 24-30 mph the bus has a noticeable front end vibration that dissipates at 30-35 mph. Its bad enough that panels are now creaking, fasteners, bolts and screws are loose and coming off. Our shop has spent many hours trying to fix the issue. They have regreased fittings, changed front wheels and tires and checked all steering and braking components. The best the mechanics can say it there might be a harmonic imbalane between the engine and transmission that a future software update might resolve. Our zone gets three new buses a year and one other new Thomas is having the same issue. Anyone have any ideas or advice regarding this?