F 350 4WD Super Duty V10-6.8L VIN Z CNG (2003)
Suspension Spring ( Coil / Leaf ): Specifications
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.)