Spring - F-250, F-350: Installation

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: 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.

Position the rear spring and install the shackle-to-rear bracket bolt and flagnut until snug. Do not tighten the nut at this time.
NOTE: 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.

Install the spring-to-front bracket bolt and nut until snug. Do not tighten the nut at this time.
NOTE: Final tightening of the U-bolt nuts must be done with the suspension at curb height or incorrect clamp load may occur.

Position the bottom cap and install the U-bolts and nuts, align the U-bolts so they are as vertical as possible, and tighten until snug. Do not fully tighten the nuts at this time.
With the suspension at curb height, tighten the new shackle-to-rear bracket bolt to 225 Nm (166 lb-ft).
With the suspension at curb height, tighten the new spring-to-front bracket bolt to 515 Nm (340 lb-ft).
With the suspension at curb height, tighten the new nuts evenly in a cross-type pattern in 4 stages.
- Stage 1: Tighten to 65 Nm (48 lb-ft).
- Stage 2: Tighten to 130 Nm (96 lb-ft).
- Stage 3: Tighten to 200 Nm (148 lb-ft).
- Stage 4: Tighten to 265 Nm (195 lb-ft).
Install the wheel and tire. For additional information, refer to WHEELS AND TIRES .