Yes, I think the builder didn't even use shoulder bolts. I think they just used regular straight type bolts and locktighted them in. At least my builder used two bolts on each one. I can't believe your builder only used one bolt on each one. Who built that coach?
'03 Freightliner FL112, 295" wheel base, with '03 United Specialties 26' living quarters, single screw, Cat C12 430 h/p 1650 torque, Eaton 10speed , 3.42 rear axle ratio