Why Gen 2 Raptor Rear Leaf Springs Sag and What to Do About It

The Gen 2 Raptor's rear suspension is a multi-leaf spring pack, not the coilover setup many performance trucks use. Ford chose leaf springs for load-carrying capacity and to keep towing ratings viable. The tradeoff is that leaf springs take a set under sustained heavy load or extreme impact — they sag, and the truck sits lower in the rear than it did from the factory.

The factory rear leaf pack was designed for a range of uses from highway cruising to moderate desert running. Sustained high-speed whoop running — the kind of use the Raptor was built to do — generates repeated high-impact compression loads on the spring pack. Over time, the spring steel takes a permanent set and doesn't return to its original arc. The truck sits lower at the rear, ride quality changes, and handling balance shifts.

This is not a defect. It's wear. But it's worth understanding because a used Raptor with a sagged rear sits noticeably lower than a fresh truck, handles differently, and may bottom out more easily.

Signs of rear spring sag:

• Rear of truck sits lower than factory spec — measure from the ground to the top of the rear wheel arch and compare to factory spec
• Rear bottoms out on impacts it previously handled
• Truck looks tail-low, especially compared to photos from new

A spring shop (Deaver, National Spring, or a local spring shop) removes the spring pack, heats the individual leaves, and re-bends them back to the factory arc. This restores original ride height and spring rate. It is a legitimate repair, not a hack.

Realistic expectations:

• Re-arched springs will sag again under the same use conditions — the spring steel has memory and was already fatigued once
• Re-arching is appropriate for trucks that see moderate use and where budget is the primary constraint
• Not appropriate for trucks that will continue to see hard desert use — the re-arched springs will sag faster than new springs

Replacing the spring pack with new Ford Racing springs (or a quality aftermarket equivalent) restores original spring rate and arc with new steel. This is the correct long-term fix for trucks that see real use.

Ford Racing offers replacement leaf pack assemblies specific to the Gen 2 Raptor. Installation is a straightforward bolt-in job — remove the U-bolts, drop the axle, swap the pack, reinstall. A good shop can do this in 3–5 hours.

Aftermarket options include Deaver's Gen 2 Raptor-specific spring packs. Deaver builds springs for off-road race trucks and their Raptor-specific packs are respected. They offer options from near-stock to increased spring rate for more consistent bottoming control under heavy use.

An add-a-leaf adds a supplemental leaf to the existing pack, increasing spring rate and ride height. This is the cheapest option and the least appropriate.

The problem: adding a leaf to a fatigued pack increases spring rate but doesn't restore the arc of the original leaves — the sag comes from the main leaves losing their arc, and an add-a-leaf doesn't change that. The truck rides firmer but may still sit low. Add-a-leaf is appropriate for trucks that need increased load capacity or are routinely towing near their limit. It's not a spring sag fix.

Several companies offer rear coilover conversion kits for the Gen 2 Raptor. These replace the leaf pack entirely with a coilover setup. This is a different truck after conversion — the ride quality changes significantly, load capacity drops, and the towing capability is reduced. This is a build decision, not a maintenance decision. It costs $3,500–$6,000 in parts before installation.

If your use case is pure desert performance and you're not towing, it's worth investigating. If you use the truck for towing or carrying loads, this path eliminates that capability.

Steps

1. Measure current rear ride height — floor to wheel arch at the center of the rear wheel, truck empty, on flat ground
2. Compare to factory spec (varies slightly by trim — verify in Ford's documentation for your year)
3. If sag is 1" or less: re-arch is appropriate if budget is constrained; spring pack replacement for long-term fix
4. If sag is more than 1.5": full spring pack replacement is the correct call
5. Remove factory U-bolts and leaf spring mounting hardware (penetrating oil on hardware — these fasteners corrode)
6. Install new spring pack and new U-bolts — do not reuse old U-bolts on a spring pack replacement
7. Torque U-bolts and all leaf spring fasteners to factory spec (consult Ford service manual for your year)
8. Re-check torque after 100 miles

Why it works

• Full spring pack replacement restores factory performance at reasonable cost
• Deaver and Ford Racing aftermarket options offer improved durability over OEM
• Re-arch is a legitimate budget option for moderate-use trucks

Trade-offs

• Add-a-leaf does not fix spring sag — it changes spring rate only
• Re-arched springs will sag again faster if use continues unchanged
• Coilover conversion eliminates towing capacity and is a significant project
• Leaf spring hardware (U-bolts, end bolts) corrodes — budget for replacement hardware regardless of which fix you choose

Tools required

• floor jack
• jack stands
• spring compressors
• torque wrench
• metric sockets
• breaker bar
• penetrating oil

Parts

Sources

• Deaver Springs Raptor leaf spring service
• Gen 2 Raptor rear spring sag community documentation

Related

• Deaver Leaf Packs on the Raptor — The Rear Suspension Fix That Actually Works
• Shock Upgrade for the Gen 1 Raptor — Fox 3.0, King 2.5, and RCD Options
• All Ford F-150 Raptor guides & tools
• Browse the full DIY database

Written and maintained by an AZ wheeler and driveway wrencher. How we source guides. Always cross-reference your factory service manual — modifications affect vehicle safety and warranty. Work at your own risk.