my Ford F-150 13th Generation (2015-2020) rear end is sagging what's causing it

Ford F-150 13th Generation (2015-2020)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

528 words

Problem Statement

Learn how to diagnose and fix a sagging rear end on your 2015-2020 Ford F-150. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Suspension

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always use jack stands when working under the vehicle.
•Ensure the vehicle is securely supported before removing suspension components.

Symptoms

•Noticeable drop in rear height compared to the front
•Uneven tire wear on the rear tires
•Poor ride quality or bounciness in the rear suspension
•Difficulty in towing or carrying loads
•Possible scraping noises over bumps

Diagnostic Steps

1
Inspect the leaf springs for any signs of damage or fatigue.
2
Check the rear shocks for leaks or wear; press down on the rear bumper to assess rebound.
3
Verify the load capacity and distribution; ensure the truck isn't overloaded.
4
Measure the height of the rear end compared to manufacturer specifications for proper alignment.
5
Examine the rear suspension components, including shackles and bushings, for wear or deterioration.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Jack
•Jack stands
•Socket set
•Torque wrench
•Measuring tape

Parts Required

•Leaf springs (if damaged)
•Rear shock absorbers (if worn)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Inspect the leaf springs for any signs of damage or fatigue.
2
Check the rear shocks for leaks or wear; press down on the rear bumper to assess rebound.
3
Verify the load capacity and distribution; ensure the truck isn't overloaded.
4
Measure the height of the rear end compared to manufacturer specifications for proper alignment.
5
Examine the rear suspension components, including shackles and bushings, for wear or deterioration.

Solution

1. Preparation

Gather tools: jack, jack stands, socket set, torque wrench, and a measuring tape.
Ensure the vehicle is parked on a flat surface and the engine is off.
Disconnect the battery if you will be working near electrical components.

2. Inspect and Replace Leaf Springs (if necessary)

Inspect Leaf Springs:
- Remove the rear tires for better access.
- Check for cracks, sagging, or broken leaf springs.
Remove Old Leaf Springs:
- Use a jack to support the rear axle.
- Unbolt the U-bolts securing the leaf springs to the axle using a socket set.
- Remove any additional brackets or shackles that hold the leaf springs in place.
Install New Leaf Springs:
- Position the new leaf springs in place, ensuring proper alignment.
- Reinstall the shackles and U-bolts, tightening them to the manufacturer’s torque specifications (usually around 70-90 ft-lbs).

3. Replace Rear Shocks (if necessary)

Remove Old Shocks:
- Unbolt the top and bottom of the shock absorber using a socket set.
Install New Shocks:
- Position the new shocks and secure them with bolts.
- Tighten bolts to the manufacturer’s specifications (typically around 30-40 ft-lbs).

4. Adjust Load Distribution

Check Load Capacity:
- Ensure that the vehicle is not overloaded beyond its rated capacity.
- Redistribute weight in the bed or trailer as necessary.