I have a slight trailer vibration at approx. 64 MPH - 70 MPH. Carlisle tires are brand new with correct tire pressure, balanced, and per my dealer there is no sign of axle or spindle issues and/or damage. There's no vibration at any speed when driving my vehicle (F 150) without towing. Also, based on the measurements and math my drop/ball is about a 1/4" high, and then will get closer to level when hooked to trailer. Vibration seems to be on the right side.
Any thoughts or opinions are appreciated.
Thanks