Bad Vibrations

[Mfreyder]

Bought a Four Winds Chateau Sport a month ago. Coming home we had a bad vibration that turned out to be a bad tire. RV had new tires on the front, 2011 tires on the back. Replaced all four tires on the back so we knew we had good tires to start.

So the bumping went away, but now we have a vibration that is shaking the microwave to death. Microwave floats, held in place by a face plate that has braces going around the back, and the face is held by four screws to the cabinet. On a recent trip we had to remove the microwave to be able to hear ourselves think.

Question is what is causing this vibration? Drive train vibrations? Drive shaft? Anyone have experience with this problem? I'm heading out to check U joints today. Suggestions?

Thx

[wolfe10]

Lots of causes of vibrations. You need to check them one at a time:

1. Is the vibration more noticeable in the steering wheel or floor (front or rear)?

2. Even before checking tires for balance, you need to check them for RUN-0UT. If over .035" fix it-- even a perfectly balances egg-- well, it rolls like an egg.

3. Then balance the tires. On front, best to balance on the rig.

4. After tires have been eliminated as the cause, check U joints and drive shaft alignment.

[Handbasket]

What chassis, length, and year?

Jim, "Mo' coffee!"

[harley-dave]

Did you have the new tires spin balanced? Some people say you don't need too, but in my experience its a must. Even on the RV..

Dave