Bus Vibration

[Jamie Bradford]

I just returned home from Kerrville The past two days I have felt a "new vibration". It is not bad as speed increases over 55 but seems worse at 40-50?

At speeds below 25 it feels like the whole bus is "shuttering" and "vibrating"???

Any ideas?

Thanks

Jamie

[Steve Bennett]

I would look at the u-joints in the drive train, or the transmission if it is worse under acceleration. Other options, loose wheel, engine mount, engine misfire, loose flywheel or bad tire?

[JIM KELLER]

Jamie, Does it change or stop when you turn off the dash air ?

[Jamie Bradford]

Jim

I have not tried that.

[truk4u]

Fuel filter?

[Jon Wehrenberg]

Jamie, to expand on Steve's response please run your hands around the tires to insure you don't feel any uneven tread wear or what may be a tread separating from the body of the tire. Check your tire pressures to make sure one hasn't failed. Other than that Steve's list is a real good place to start.

Can you get a sense of where it feels the worst by moving around the coach to try to determine if it is in the front, rear, near the engine, etc?

I know from posts to this and Prevost-Stuff threads over the years vibrations are very difficult to isolate in our coaches so I hope whatever is happening is obvious so it can be fixed.

[Toy Box]

Look carefully at the radiator fan/gear box.

[bonhall41]

Sounds like a new bus would take care of the problem.

[Orren Zook]

Jamie,
All things aside, see if you can find an alignment shop near you that can spin balance your steer tires on the bus.... maybe its just a tire balance issue.