It is hard to exactly describe. The van has just 3800 miles, and we have been sensing this since around 500 miles.

At very low speeds, it feels like the van bumps down the road. The bumping increases with speed. Between 30-35 mph, it feels like it is "chugging" to get to 40mph. Is this a transmission thing? At higher speeds it turns into vibration, felt in the seat and the sun visor vibrates, and it feels like the vehicle rolls or sways especially at highway speeds. A vibration is also more noticeable on the left side of the vehicle, and it also changes when a heavy passenger (200 lbs+) sits in different seats in the rear. And it has gotten progressively worse as the van is driven more and more miles.

We have been to the dealer numerous (5-6) times. They keep finding and replacing bad tires. The area rep is involved too, and they used a vibration analyzer that they said pinpointed yet another bad tire. 2 weeks ago we put 4 brand new VERY good tires on it. With the new tires, we have a much smoother ride, but the bumping/thumping/chugging/vibrating/swaying still comes and goes. The dealer has also aligned the vehicle, as it had a pull to the left. The alignment seems pretty good now, but could this be an alignment issue?

I have read so much about rotors, alignments, wheel balancing, and the dealer has done all they are willing to do, that is tires, unless I can come up with some exact things to specify to get answers on or checked out. I feel like "there is something they are not telling me" or Hyundai just does not want to fix things because they all play dumb. And this just does not make sense....why would they want negative experiences like these on the internet?? Don't they know how much negativity this creates about their vehicles??

Help anyone, please.

Two suggestions - have someone else check the balance on your tires just to get a second opinion on the tires; and have them check your struts/shocks. A bad strut/shock could react this way to a slightly out of balance tire.

Thnak you very much. Definitely are having someone else take a look and appreciate the advice on helping them hone in on certain things to look at. Thanks again for the reply.

Just adding to my saga.

I do not do much highway driving but at about 60 mph and up, the things shakes/vibrates....in the seat, in the steering wheel, and in the floor.

So the tire shop checked the tires. Tires checked out.

They also checked the alignment. What they found was the rear was out of alignment, and they told us that the rear on the Entourage is NOT adjustable. (They thought it needed a cambolt kit??) They printed off all of the numbers so we can go back to the dealer. No, this was not revealed to us with the 1st alignment done back in January. And no I have not hit anything. This rideability problem has been reported to Hyundai since about mile 900.

So called the another local dealer who said, there is adjustment in the rear, but if it can't be aligned to be within spec, then something is bent. I will post what transpires next, but it has been this way from day 1, so I hope it can be fixed.

This post has been edited by meljackmom: Mar 24 2008, 04:16 PM

If its under waratee Is it a diesel? get them to check the injector presures, they should be able to do this diagnostically, My Bro in laws range rover is doing this and I took it in to the deisel experts today, all of his injectors are shafted, two were way out, felt like the clutch was failing at the lights in drive and cruising it vibrated through the whole cabin and gets into your head, serves him right for buying expensive crud

how many miles do you have?