Fix that droopy rear end and get your truck level again when hauling heavy loads.
If your truck squats down every time you hook up a trailer or load the bed, you're not alone. Rear-end sag is one of the most common problems drivers face when towing or hauling, and it can affect stability, braking, and steering. Fortunately, it’s easy to correct with the right suspension upgrades.
Here’s how to reduce or eliminate rear sag and regain a level ride.
What Causes Rear Sag?
It all comes down to weight. When you add cargo or trailer tongue weight to the rear of your truck, the suspension compresses. If your springs can’t handle the load, the rear sags and the front lifts—making steering vague and reducing control.
How to Fix It
1. Helper Springs
Bolt-on helper springs like SuperSprings add support to your factory leaf springs. They only activate under load, meaning your ride stays comfortable when unloaded but gains stiffness when needed.
2. Airbags
Airbag kits go between the frame and axle and can be inflated manually or automatically to raise the rear back up. These offer adjustability but require maintenance and more complex installation.
3. Add-a-Leaf Kits
These permanently stiffen your rear spring pack by adding another leaf. They’re effective but can make the ride rougher, even when unloaded.
4. Upgraded Leaf Springs
If your truck has high mileage or you're consistently overloading it, full replacement leaf springs with a higher load rating may be worth the investment.
5. Weight Distribution Hitch (for trailers)
A WDH helps shift tongue weight forward onto the front axle by using spring bars and brackets. It won’t help with bed sag, but it will level out your trailer setup.
6. Don’t Forget the Shocks
Worn shocks won’t cause sag directly, but they’ll make it worse by allowing excess movement and bounce. If your truck feels sloppy under load, it might be time for new rear shocks too.
Pro Tip: Always know your vehicle’s payload and tongue weight capacity. If you’re maxing it out or exceeding it regularly, no suspension mod will make up for that.
Final Thoughts
Reducing rear sag isn’t just about looks—it’s about safety. By adding support where your factory suspension falls short, you’ll drive with more confidence and control every time you tow.