I have a vibration around 70 MPH.Comes and goes. It seems to come in the LF Wheel. Just had two Shops balancing them, and hasn't changes anything. At times it is on flat highway but when light acceleration it comes a bit more.. Almost always it does it in the Steering Wheel but sometimes it's in the seat. Down hill it doesn't do it.

 

Model? Had someone look at the left front suspension?

 

How are your front stabilizer bar bushings? I saw this when one of mines bolt worked itself loose.

How to check tightness? Put hood in service position. Use a 24 inch extension with a 10mm ratchet. That will allow you to reach from the top.

Ttytt, it made a lot of noise turning at low speeds or going over bumps slowly too when I had this condition.

John

 

1998 XK8, Just replaced all worn parts of the Suspension.

 

If the shops did not road force balance it was a waste of your money when chasing a vibration, it checks the roundness of the tire and wheel assembly. I can drill a hole in a brick and balance it. How will that ride? Yep but its perfectly balanced. I always always sell a road force to start with. Just did 1 last week that was low roadforce but shook the machine enough it picked it up. It was axial distortion(side to side so the roller does not measure that only the tire face. If the shop looks a you wierd when you ask about road force then go somewhere that does. If it is high it will tell you where the high spot of the tire is and the low of the wheel so you can match them up . It will also tell you if that will not work . And need either a tire or wheel replacement of repair from a bend. Also te spec for passenger car is .26 or quarter inch. Obviously the lower the number the better and MORE round the assembly is

 

Have a look at the Guibo, or flex joint connecting the output shaft from the transmission to the driveshaft

Guibo

 

How many miles were on the disintegrating one?

 

Had that exact symptom on my 04. Steering wheel shimmy above 60 mph that was there sometimes and sometimes
it was gone. I replaced all my front end suspension rubber/ball joints/shock mounts and that cured it.

 

93,000 miles.

 

Wow. I was hoping it would be 150,000 miles or more. Looks like all of us need to pay attention to that component....

 

Jon don't worry about that. That's a unicorn. those rarely fail. I have 195k on mine and they're in great shape no cracks even

 

Thanks Brutal. Always good to hear from you....

 

XK8 99.Mine only does it with the top down.Figure that one out.