After having several front end shops and a Ford dealer trying to find the noise (
clunk over a bump) and replacing all ball joints and shocks (110,000 mi). the only thing i had not replaced was the
frame to antisway bar bushings, (
Moog pn K80203), upon replacement my front end was quiet and the ride was remarkably restored to like new condition, cost (under $15.00) plus 15 min. cost to learn

($1200.00 plus), the rubber and the design in the OEM bushing failed early as i had this clunk for about 40k
I will replace the bushings on the rear sway bar next

My Excursion currently has 130,000 mi and at 98k injectors had to be replaced by ford under warranty,
the vacume pump for heat and air and 4x4 control has failed twice (motor burnout). no warranty on this item. will consider after market part next time

fuel milage is 19 to 22 @ 65mph, on turnpikes. tow milage is 14 mpg pulling a 35 ft travel trailer weighing 9000 lbs on flatland.