Suspension Spring ( Coil / Leaf )

Rear Spring U-Bolt Nut F-250, F-350 250 Nm (185 ft. lbs.)
Rear Spring U-Bolt Nut F-450 300 Nm (222 ft. lbs.)
Rear Spring U-Bolt Nut F-550 350 Nm (259 ft. lbs.)

FRONT
4x2
Upper spring retainer bolt-to- spring/shock tower 35 Nm (26 ft. lbs.)
Lower spring retainer nut-to-lower spring seat 133 Nm (99 ft. lbs.)
Front spring U-bolt nut-to-axle 133 Nm (99 ft. lbs.)
Front spring hanger nut-to-front spring 275 Nm (203 ft. lbs.)
Front spring hanger bracket bolts-to-frame 103 Nm (76 ft. lbs.)
Front spring shackle bracket nut-to-front spring 250 Nm (185 ft. lbs.)
Front spring shackle bracket nut-to-shackle bracket assembly 250 Nm (185 ft. lbs.)

4x4
Front spring-to-axle U-bolts 133 Nm (99 ft. lbs.)
Front spring-to-spring hanger nut 275 Nm (203 ft. lbs.)
Front spring-to-shackle nut 250 Nm (185 ft. lbs.)
Spring hanger-to-frame bolts 103 Nm (76 ft. lbs.)
Spring shackle-to-frame nut 250 Nm (185 ft. lbs.)

REAR
F-250, F-350 Wide Frame
Leaf spring-to-axle U-bolt nut 250 Nm (185 ft. lbs.)
Leaf spring-to-front spring hanger bracket nut and bolt 250 Nm (185 ft. lbs.)
Leaf spring-to-rear shackle nut and bolt 250 Nm (185 ft. lbs.)

F-350 Narrow Frame
Leaf spring-to-axle U-bolt nut 250 Nm (185 ft. lbs.)
Leaf spring-to-front spring hanger bracket nut and bolt 250 Nm (185 ft. lbs.)
Leaf spring-to-rear shackle nut and bolt 225 Nm (166 ft. lbs.)