Bad Vibration

[BIG--T]

I have a 99 I/S with just 10k on her. I ran about 500 miles this weekend and halfway through I felt a bad vibration. I pulled over and checked my air pressure and it was ok. I didn't see a weight that come off or a knot and I feel it in the bars and all over. It has fairly new tires.

Thanks for any help on what to check.

[R J]

1st thing I'd do is get the front tire off the ground and rotate it looking for a rise in the tread.    If ya find nothing there do the rear.

Sounds like 1 of the 2 has got a baby in its belly.    You know a separation in the tread and tire body.

What kind of tires and what is the manufacture date on the tire?
Also, how many miles on them?

[BIG--T]

1st thing I'd do is get the front tire off the ground and rotate it looking for a rise in the tread.    If ya find nothing there do the rear.

Sounds like 1 of the 2 has got a baby in its belly.    You know a separation in the tread and tire body.

What kind of tires and what is the manufacture date on the tire?
Also, how many miles on them?

Thanks RJ, I did a visual on the road but since I'm home now I'll jack it up and see. The tires are 880 Metz and only about 2500 miles, but I don't know the manufacturer date. Where do I look for the date?

[Earl in Pensacola]

Could it be that you have two separate problems, one being the shifter and the other being the U-Joint???  First change the shifter back to the OEM and recheck for a viberation problem.  If it's gone, then you decide what you want to keep.  If it's still there, pull the rear tire off and drive shift out, check the U-joint for any looseness.  Lets us know what yo find.

[BIG--T]

Could it be that you have two separate problems, one being the shifter and the other being the U-Joint???  First change the shifter back to the OEM and recheck for a viberation problem.  If it's gone, then you decide what you want to keep.  If it's still there, pull the rear tire off and drive shift out, check the U-joint for any looseness.  Lets us know what yo find.

It could be and I'm checking one at a time starting with the wheels. I wouldn't think or hope it's not the u joint at only 10K miles and it's been babied- no popping clutches, burn outs, etc.

[TGViper]

Is the vibration under gear load only or does it happen rolling down the road when you pull the clutch in as well?