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Home >> Ford >> 2003 >> Cutaway 7.3 F >> Repair and Diagnosis >> External Pages >> Different car >> Section 2058 (Rear Suspension -- F250-F550 Super Duty) >> Removal And Installation >> Spring - F-450, F-550 >> Installation

Spring - F-450, F-550: Installation

WARNING: This page is about a different car, the 2008 Ford Pickup, 2008 Ford F550 Super Duty, 2008 Ford F450 Super Duty, and 2008 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. If removed, install the auxiliary spring in the following sequence.
    1. Position the auxiliary spring spacer.
    2. Position the auxiliary spring.
    3. Position the upper spring plate.
    4. Install the auxiliary spring nut and tighten to 100 Nm (75 lb-ft).
    2. CAUTION: Final tightening of the spring-to-shackle nut must be done with the suspension at curb height or damage to the bushing may occur.
  2. Position the rear spring shackle onto the spring and install the spring-to-shackle nut and bolt until snug.
    3. CAUTION: Final tightening of the shackle-to-rear bracket bolt must be done with the suspension at curb height or damage to the bushing may occur.
  3. Position the rear spring assembly and install the shackle-to-rear bracket bolt and flag nut until snug.
    4. CAUTION: Final tightening of the spring-to-front bracket bolt must be done with the suspension at curb height or damage to the bushing may occur.
  4. Install the spring-to-front bracket bolt and flag nut until snug.
    5. CAUTION: Final tightening of the U-bolt nuts must be done with the suspension at curb height or incorrect clamp load may occur.
  5. Install the U-bolts, springs plate and U-bolt nuts. Align the U-bolts so they are as vertical as possible and tighten the nuts until snug.
  6. With the suspension at curb height, tighten the spring-to-shackle nut to 225 Nm (166 lb-ft).
  7. With the suspension at curb height, tighten the shackle-to-rear bracket bolt to 225 Nm (166 lb-ft).
  8. With the suspension at curb height, tighten the spring-to-front bracket bolt to 515 Nm (340 lb-ft).
  9. With the suspension at curb height, tighten the U-bolt nuts evenly in a cross-type pattern in 4 stages.
    • Stage 1: Tighten to 100 Nm (74 lb-ft).
    • Stage 2: Tighten to 200 Nm (148 lb-ft).
    • Stage 3: Tighten to 300 Nm (222 lb-ft).
    • Stage 4: Tighten to 400 Nm (295 lb-ft).
  10. Install the wheel and tire. For additional information, refer to WHEELS AND TIRES article.
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