Alignment or Balance? 2002 GS 300

likely an alignment will help. Tire balance issues generally pop up the highway while cruising, but them balanced also since the tires were rotated. Each wheel likely had a different weight on it anyway, now that you have swapped their positions, the balance will be out of whack again.

But first, I would check your brakes for wear on the rotors or uneven wear on the pads.

An out-of-balance tire(s) (on front end) usually causes a vibration through the steering column when the car's speed exceeds, and stays above, 20-25 miles per hour. FYI: if a tire(s) is out of balance in the rear, the vibration is felt through the seat.

I used to sell tires 25 years ago so I don't think things have changed. Tires do wear down slightly differently on each wheel (barring, of course, a problem with that particular tire, wheel, or mechanical part on the car), so if I were you, I'd have the balancing checked first. When you pick up the car after that's done, road test it immediately (make sure to get the speed up over 25 miles per hour) and see if the vibration is gone; if it is, problem solved. If not, take it back immediately and tell the garage staff you want the front end checked.

If the problem only persists when applying the brakes, your rotors may need some turning.

My guess is over torque of the wheels, have them retorqued correctly and give them a few days.

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