Symptoms
- Rear of the vehicle visibly drops when loaded with people or cargo
- Headlights aim higher than normal when loaded
- Handling feels different, like reduced steering response, when loaded
Likely causes
- CommonWeak or worn rear springsSprings lose some of their supporting ability over time, especially if the vehicle is regularly loaded near its capacity.
- CommonVehicle loaded near or beyond its rated capacityEven healthy springs will sag noticeably if the load exceeds what they're designed for.
- PossibleWorn shocks contributing to excess sag and bounce under loadShocks don't support weight directly but worn ones make load-related sag feel worse.
What to do
- Check your vehicle's payload capacity in the owner's manual or door jamb sticker and compare it to your typical load.
- Compare unloaded and loaded ride height to see how much the rear actually drops.
- Inspect rear springs for visible sagging or damage.
- Consider helper springs, airbags, or heavier-duty replacement springs if you regularly carry loads near capacity.
- Have a shop confirm whether springs, shocks, or simple overloading is the primary cause.
Tools and parts
- Tape measure for ride height comparison
Heavy-duty rear springs or helper spring kitSearch: “heavy duty rear springs for [your truck model]”
When to call a pro
If you regularly carry heavy loads, a shop can recommend heavier-duty springs or helper airbags rated for your typical cargo weight.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.