I am losing my mind here. 1985 Scottsdale 305/th350c I installed new tires four months ago and after about a month i started getting a wobble in the front end between 35mph through 55mph.....becomes a vibration at higher speeds. Cant really say that it was occuring before the new tires, I barely drove the truck since the tires were so dry-rotted. Really noticible when cornering at these speeds. I installed new ball joints upper and lower....new bearings and races.....mechanic who installed balljoints says that all suspension parts are still good and tight. Took the truck to the goodyear dealer who said that all four were out of balance...they balanced them....was good for about a month....still felt a bit of wobble at times. After that month the wobble started getting worse again....took it to another goodyear dealer who roadbalanced the tires and said two were out of balance and one of the rims was barely warped. Rotated the wheels all around....adjusted air pressure up and down...have now installed new brake rotors thinking that they had to be the culprit......guess what.....still have a wobble. Goodyear says it cannot be the tires....WHAT THE heck?