Welcome to iRV2.
MANY , many , many reports of rear sway bar bushing / bolt failures on the newer F-53 chassis, in the Ford Chassis and many other sections of the forums .
The " search " function should give you a couple of days of reading .
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.