2003 Nissan Pathfinder LE 6 Cyl 3.5L - Transmissions & Drivetrains
At 40 mph starts to vibrate like driving on highway driver-alert ribs. Certain speeds 45-65 can feel it vibrate seat.
Front wheels with new tires moved to back, & back tires with barely used same tires pushed to front. Still vibrates at same speeds. Nothing in contact with tires except road. Steers straight. Brakes straight. No more shock dip than I expect for 128K miles. Steering suspension part? Shock(s)? Drive shaft? U-joint(s)? Brake disc(s)? Bought it used 3 wks ago with a tire shop claim that the right front tire was worn badly enough to cause - not the problem.