Question about vibration in the front end

[White Lincoln]

I was on the way to an appointment, driving on one of the state routes and had the opportunity to open up the lil' Cougar and was hitting near 100. The car was doing great, no front end or rear wheel vibration, car did real well. If I had done this earlier this year, my car would be vibrating like crazy. Earlier this year, the wheel tech at Costco said "have you checked your front wheel bearings?". I replaced those and the vibration had stopped until today. I was taking the slanted ramp from the state highway to I-25 and floored it again for a bit and immediately was getting vibration in the front end. This is concerning as it did not go away on the way home, not as bad, but it was still there at 70.

I am going to pull the front wheels off and start torquing everything down again, but wanted to know if I should be looking at anything in particular that may cause a front end vibration. I also had a 4 wheel alignment just recently. All I can think it might be is maybe I forgot to torque the upper or lower arms or something else worked lose.

Thoughts?

 

[Kidd-7]

Wheel balance, bent rim. Do you feel it in the steering wheel?

 

[Jim3inVirginia]

I chased a vibration for a couple months. Seemed to only vibrate on the highway going between 70 and 75. And with the steering wheel turned slightly to the left. Felt the vibration in the steering wheel. Tried rotating tires with a couple spares, one wheel at a time, checked the front suspension... Finally fixed it when I changed the U-joints.

 

[White Lincoln]

Wheel balance, bent rim. Do you feel it in the steering wheel?

Yes, it's something the front end.

 

[White Lincoln]

I chased a vibration for a couple months. Seemed to only vibrate on the highway going between 70 and 75. And with the steering wheel turned slightly to the left. Felt the vibration in the steering wheel. Tried rotating tires with a couple spares, one wheel at a time, checked the front suspension... Finally fixed it when I changed the U-joints.

That is my first guess and second guessing the work I did on the suspension (u jounts)

 

[XR7-4.6]

I’d switch tires front to back if you’re feeling it in the wheel. Vibration only happens through rotation, bad alignment or suspension components cause uneven tire wear, pulling one direction, rattles etc but not vibration. Vibration is tires being out of balance or out of round, wheel being bent, bad U joints, out of balance driveshaft, warped brake rotors, and wheel bearings.

 

[White Lincoln]

I’d switch tires front to back if you’re feeling it in the wheel. Vibration only happens through rotation, bad alignment or suspension components cause uneven tire wear, pulling one direction, rattles etc but not vibration. Vibration is tires being out of balance or out of round, wheel being bent, bad U joints, out of balance driveshaft, warped brake rotors, and wheel bearings.

Oh geez, I kept saying "u-joints" and for stupid reason I was thinking upper control arm. Anyway, I need to check my "upper control arm" u-joints (kidding) and see if may have not tightened a part in the process some 5 years ago and missing that that has come back to haunt me.

Thanks for all the input, it helped me to better resolve how to track this issue down.