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Hitching a trailer or loading the bed drops the rear, loosens steering, and hammers the axle over bumps. A truck shock spring adds support at the rear axle to counter that sag. The best pick here is the Gabriel Load Carrier, which owners say can lift a sagging rear end by at least 1.5 inches while towing, according to real buyer reports.
I’m Mo Maruf — the founder and writer behind GoCarLife. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
The right truck shock spring restores ride height, sharpens steering control, and keeps your headlights aimed at the road, not the treetops.
Our Picks at a Glance
How To Choose The Best Truck Shock Spring
There are two very different ways to stop rear-end sag. One is a shock absorber with a spring built around it, which you bolt on in place of your existing shocks. The other is a separate helper spring that clamps onto your leaf springs or a full coil spring replacement that swaps out the factory part entirely. Knowing which you need depends on how much weight you carry and how often.
Match the support to your load
If you tow a car hauler or haul heavy loads a few times a month, a shock with a built-in coil spring is the simplest upgrade. It replaces your rear shocks, works with your existing suspension, and adds up to 500 lbs of support per pair without touching your leaf springs. That is the easiest path for most half-ton owners.
Decide between assist and replacement
For trucks that squat badly under a permanent load like a camper shell, a full coil spring replacement with extra load capacity handles the weight more permanently. These are heavier parts, often over 20 pounds each, and they change the ride character. A helper spring kit that mounts on top of your leaf springs is lighter and quicker, but it stiffens the ride more noticeably.
Quick Comparison
| Model | Best For | Load Support | Position | Weight | Amazon |
|---|---|---|---|---|---|
| Gabriel Load Carrier★ Best Overall | Bolt-on tow support | Up to 500 lbs | Rear | — | Amazon |
| Superior 14-0490Best Value | Budget add-on springs | Universal | Rear | 7.5 lbs | Amazon |
| Helper Spring Kit 500 LBSLeaf Spring Pro | Leaf spring assist | Rated to 500 lbs | Rear | 12 lbs | Amazon |
| ACDelco Gold 519-36 | Front end support | Constant rate coil | Front | 7.5 lbs | Amazon |
| THOCAC Ram 1500 Springs | Ram 1500 towing | Extra 900 lbs | Rear | 24.5 lbs | Amazon |
| Gleyi Ram 1500 Springs | Heavy Ram loads | Extra 1100 lbs | Rear | 28.7 lbs | Amazon |
| MOOG 60148 | Silverado front rebuild | 100% load tested | Front | 37.7 lbs | Amazon |
| Gleyi 929-925 | Ford F250/E-Series lift | Extra 35% load | Front | 43.4 lbs | Amazon |
In‑Depth Reviews
1. Gabriel Load Carrier Spring Assist Towing & Hauling Shocks
Our pick — over 4.5★ from 500+ verified ratings; the strongest balance of quality and price.
The bolt-on fix that lifts a saggy truck bed and quiets the ride in one swap.
Its defining spec is up to 500 lbs of load capacity per pair, via variable-rate rear coil springs around the shock body. It dampens bumps like a standard shock while the coil holds the rear up under trailer or bed load. Buyers report it lifted sagging trucks back up at least 1.5 inches with a simple install.
It is a direct fit for Chevrolet C1500, C2500, C3500, K1500, K2500, K3500 and the matching GMC C/K series pickups, so you skip the guesswork of universal parts. The heavy-duty construction uses a Drawn-Over-Mandrel (D.O.M.) pressure cylinder, a tube formed without a welded seam, to reduce internal wear. A leak-proof piston seal helps extend shock life under constant towing stress.
Owners most often discuss ride-height recovery. One owner with a 98 K1500 reported the truck maintains close to level when towing a car on a car hauler, and another noted a 1-2 inch raise. The trade-off is a stiffer ride, which some owners say they actually like for the stability it brings.
What owners rave about
- Raises sagging rear ends by 1.5 to 2 inches
- Simple bolt-on install over factory shocks
- Keeps the truck level while towing a car hauler
What to expect
- Ride firms up noticeably when unloaded
- Only fits GM C/K series trucks, not universal
Reach for this if: you tow a trailer or haul heavy loads with a GM half-ton or three-quarter-ton and want the simplest possible sag fix without lifting kits.
Look elsewhere if: you need front-end support or drive a Ford or Ram, because this pair is built for the rear of Chevrolet and GMC pickups.
2. Superior 14-0490 Load Control Springs For Rear Shock Absorbers
A budget-priced spring that slides over your existing shocks to fight the sag.
What makes this pick different is the universal design: it fits easily over Original Equipment Manufacturer (O.E.M.) shock absorbers, meaning the factory shocks your truck came with. The unique variable pitch design, where the coil spacing changes along its length, lets the spring handle light and heavy loads differently. At just 7.5 pounds, it is a lightweight add-on compared to the 12-pound helper spring kit and the 24.5-pound full coil swaps below.
Owners talk most about the value. They call it a great value that works well, and one noted it makes towing easier by restoring rear ride height on a 98 Explorer. Another found it prevented bottoming out in heavily loaded trucks, and one even used them on an EZGO ST 480 golf cart front end to add lift and smooth the ride.
The honest catch shows up in the hardware. Several owners mention the kit bolts are too short and had to buy longer ones, and one flagged the clamps as flimsy. The dimension check also came up short for one buyer, who measured a different inner diameter and length than advertised. For the money, though, the load control works as advertised once the mounting bolts are sorted.
Solid budget assist: the value is real, and the adjustable chrome springs restore ride height and stop bottoming out on loaded trucks.
Plan for hardware: budget for longer bolts, because the included clamps are the weakest link and several owners swapped them out.
3. Helper Spring Kit, 500 LBS Heavy Duty Helper Springs
A powder-coated alloy steel kit that mounts on top of your leaf pack to hold the bed level.
This is the only pick in the lineup designed to be installed on top of the rear leaf springs, working in conjunction with the stock spring pack rather than replacing anything. The kit is rated to keep the truck level up to 500 lbs of load, and the 12-pound alloy steel construction is powder coated for corrosion resistance. It is built for a midsize truck that pulls ATVs, jet skis, lawn care equipment, or a small camper.
Owners notice the difference immediately. One put them on a 30-year-old van and reported the change was noticeable, while another said they prevented Tacoma squat with heavy loads and trailers. On a 1996 Ford Explorer, the kit raised the rear a solid 1 inch and eliminated age sag. The quality earns the most praise here, with owners calling it a great set of springs for the money.
Installation needs an 18mm deep socket and a ratchet, with an impact gun helping, and the kit includes all hardware. One owner noted it gave a 3/4-inch lift and stiffened soft leaf springs, and another suggested buying pairs for the front too.
Quality first: the build quality is the standout, and the bolt-on install needs no cutting or modification.
Expect stiffness: the added support stiffens soft factory leaf springs, which is the trade-off for killing the sag.
4. ACDelco Gold 519-36 Front Spring Assisted Shock Absorber
The front-end specialist that lifts a nose-diving truck and smooths the boat-like sway.
This pick is the only one here that works the front axle, not the rear. The constant rate front coil springs (springs that keep a steady stiffness as they compress) help keep your ride height stable and your steering predictable. The smooth Drawn-Over-Mandrel (D.O.M.) tubing (a type of steel tube with no weld seam) reduces internal wear, so the part lasts longer. A super finished, chromed piston rod resists rust and keeps the seal lubricated. At 7.5 pounds, it is a light front-end part compared to the 37.7-pound MOOG coil spring set below, so it is easier to install and puts less unsprung weight on your axle.
Owners praise the quality most, with ride improvement close behind. One owner with a 1996 Impala said the front end rose 2 inches, preventing scraping, and eliminated the boat-like ride. Another noted it reduced bumps and gave a smoother ride in a 2000 handicap van. Fitment is vehicle specific, with owners confirming it on a 2002 Grand Marquis, a 95 Town Car, and a 96 Impala.
The trade-off is firmness. Owners describe the springs as definitely stiff, with one noting some bob over large dips in the road. Fit and value get mixed feedback, with some saying they fit perfectly and others reporting they do not match specifications for their vehicle. It carries a 24 Month / Unlimited Mile Limited Warranty on parts sold after 04/01/18.
The strong points
- Raises a sagging front end by up to 2 inches
- Eliminates boat-like ride on large sedans
- Backed by a 24 month limited warranty
Watch for
- Stiff ride over large dips in the road
- Fit varies by vehicle, so confirm before buying
Best for: owners of GM cars and light trucks who want to restore front ride height and kill the floating sway with a direct-fit shock.
Not for: anyone needing a universal part, since this is vehicle specific and the stiffness may bother comfort-first drivers.
5. THOCAC Rear Heavy Duty Coil Springs for Ram 1500 2009-2018
A full coil swap that adds 900 pounds of load capacity to a sagging Ram 1500 rear.
Where the Gabriel shock assists your existing suspension, this part replaces the rear coil springs entirely on a 2009-2018 Ram 1500 in both 2WD and 4WD. The rear coil springs provide an additional 70% load capacity, which works out to 900 pounds at stock ride height. That is a big jump from the 500 lbs of the bolt-on helpers, and it effectively reduces the sagging height of the rear or increases the weight capacity of the bracket.
The build uses SAE 9254V spring steel processed by CNC, with corrosion protection from powder coating and phosphate treating. At 24.5 pounds, it is a serious hunk of metal. Owners confirm it fits like factory but with extra load capacity, and one called it a huge difference when towing a heavy load. The install takes 1-2 hours with no modifications, just disconnecting the lower shock bolt and lowering the axle.
The mixed feedback centers on ride quality. One owner with a 2022 Ram 1500 Ecodiesel called it an awesome upgrade but noted the ride is stiffer, and another said it rides fairly rough loaded or unloaded, planning to swap to progressive springs later. The ride height stays factory correct, which is exactly what you want if you are not chasing lift.
Load capacity win: the extra 900 pounds of support at stock height is the strongest reason to choose this over a helper spring.
Comfort trade-off: the ride is firm and can feel harsh on rough roads, so comfort-first drivers may want progressive springs.
6. Gleyi Rear Heavy Duty Coil Springs for Ram 1500 2009-2018
The heaviest Ram hauling spring here, adding 1100 pounds of support for big towing jobs.
This is the higher-capacity twin of the THOCAC springs above, and it beats it on raw load support. The rear coil spring provides an additional 70% Load Capacity, which is an additional 1100 lbs, compared to the 900 pounds of the THOCAC. At 28.7 pounds, it is also the heavier part, and the powder-coated surface resists rust and scratching. It fits the same 2009-2018 Ram 1500 in 2WD and 4WD, and is listed as comparable to TTC-1223 and 929-913.
The owner feedback is uniformly strong. One called them the best coils you can buy for the price, noting a really smooth ride plus heavy load stability. Another with a 2009 Ram said they dropped right in, raised the back a couple of inches, and stopped the bottoming out when hooking up a trailer. A 2016 Ram owner reported the sag from a camper shell and pull-out bed drawer was solved, and the ride improved. One 2022 Ram GT Sport owner saw the rear jacked up over 3 inches.
The only consistent caveat is shipping, with one owner noting slow delivery. The truck rides a little stiffer, but owners describe it as not bad at all, and the stability under load is the payoff. If you regularly pull a side-by-side or a heavy camper, this extra 200 pounds of capacity over the THOCAC is worth the step up.
Why it leads
- Highest load support here at extra 1100 lbs
- Raises sagging rear ends by 2 to 3 inches
- Customers note a smooth ride under heavy load
Keep in mind
- Stiffer ride when the bed is empty
- Shipping can be slow, per one owner
Reach for this if: you drive a 2009-2018 Ram 1500 and need the maximum extra load capacity for towing heavy equipment or hauling a loaded bed.
Think twice if: you want the softest possible unloaded ride, because these firm up noticeably when the bed is empty.
7. MOOG 60148 Coil Spring Set for 1999-2006 Chevrolet Silverado 1500
The front coil set that fixes a Chevy lean and brings back the factory ride height.
This MOOG set is a front-end only replacement, and it is the heaviest standard coil spring here at 37.7 pounds for the set. It fits the 1999-2006 Chevrolet Silverado 1500, the 2007 Silverado 1500 Classic, the 2000 Tahoe, and the matching 1999-2006 GMC Sierra 1500, 2007 Sierra 1500 Classic, and 2000 Yukon. Every spring is 100% load tested, and the alloy steel build is designed to lower stresses for a longer service life.
Buyers praise the build quality most, with sag reduction a close second. One owner reported it fixed their sagging truck and gave a solid recommendation. Another with an 02 GMC Sierra 1500 2WD regular cab said the ride was much softer than the worn-out springs and it fixed the front end sag. A Chevy owner reported the ride height came out perfect and the ride quality is way better, with the springs settling in evenly. If your front end dips or feels bouncy, this is the fix you are looking for.
The mixed notes come down to firmness. Some owners find the springs less rigid than the factory stock springs, which is actually a plus for comfort but a change in feel. One owner noted the front end sag fix came with a softer ride, and after 100 miles everything was holding up well. The 30-day warranty is shorter than the ACDelco’s 24-month coverage, but the load-tested reliability earns trust.
Rebuild essential: the 100% load-tested springs fix front-end sag and correct the Chevy lean that causes premature tire wear.
Softer feel: owners describe these as less rigid than stock, which smooths the ride but changes the factory firmness.
8. Gleyi 929-925 1″-1.5″ Lift Front Heavy Duty Coil Springs for F250 F350
The heaviest front coil here, lifting a Ford pickup and adding 35% more load capacity.
This is the biggest and heaviest part in the entire lineup at 43.4 pounds, built for the front end of heavy Fords. It fits the 1999-2016 F250 2WD, 1999-2016 F350 2WD, and the 1992-2023 E-250, E-350, and E-450 2WD vans and cutaways. The front coil spring provides an additional 35% Load Capacity and is designed for vehicles with a 1 to 1.5-inch lift, meaning it raises the front while adding support for weight over the nose.
Owners confirm the lift and added firmness. One with a 2016 Thor Axis motorhome on a Ford E-450 chassis got about 1.5 inches of added lift and a firmer ride, noting it was easy to install after removing the front shock for slack. Another with a 2015 F250 4×4 said it fit perfect, raised it a little more than 1 inch, and needed no alignment afterward. An E350 owner reported finally getting a good front end alignment because the old springs were shot.
The quality control is the real risk here. One owner reported a manufacturing defect where the spring top bent at the wrong angle, turning a 2-hour install into an over 8-hour job requiring a torch and pry bars. That is a genuine outlier, but it is the kind of thing to inspect before you start. When the part is right, the ride and lift are exactly as promised.
The payoff
- Adds 1 to 1.5 inches of front lift
- Extra 35% load capacity for heavy front weight
- Reviewers point out no alignment needed after install
The risk
- One owner hit a spring top defect that made install brutal
- Heavy part at 43.4 pounds demands careful handling
Best for: owners of 1999-2016 Ford F250/F350 2WD trucks or E-Series vans who want front lift plus extra load support in one swap.
Check first: inspect the spring top angle before install, because one owner hit a defect that turned a quick job into a long one.
Understanding the Specs
Load Capacity
This is the number that tells you how much extra weight the spring holds up before the rear sags. The Gabriel shock handles up to 500 lbs per pair, the THOCAC coil adds 900 lbs, and the Gleyi Ram spring adds 1100 lbs. Higher capacity fixes more sag, but it usually means a stiffer ride when the bed is empty.
Position and Fitment
Front and rear springs are not interchangeable. The ACDelco and MOOG handle the front axle, while the Gabriel, Superior, THOCAC, and Gleyi Ram springs work the rear. Fitment ranges from vehicle specific like the Gabriel for GM trucks to universal like the Superior that slides over any O.E.M. shock. Always confirm your year, make, and model before buying.
FAQ
Will a truck shock spring raise my sagging rear end?
What is the difference between a helper spring and a coil spring replacement?
Will stiffer springs ruin my truck’s ride quality?
How do I know if a shock spring fits my truck?
Can I install a truck shock spring myself?
Will these springs fix front end sag too?
Do these springs increase my truck’s payload rating?
What is a variable-rate or constant-rate coil spring?
Why are some of these springs so much heavier than others?
Should I replace shocks and springs at the same time?
Final Thoughts: The Verdict
For the majority of shoppers, the truck shock spring winner is the Gabriel Load Carrier because it is the simplest way to lift a sagging rear end and hold a tow load with up to 500 lbs of support per pair, all in a bolt-on shock. If you drive a Ram 1500 and want maximum rear support, grab the Gleyi Ram Springs with their extra 1100 lbs of capacity. And for a budget-friendly add-on that works on any truck, the Superior 14-0490 is the one to reach for.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of August 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
As an Amazon Associate, GoCarLife earns from qualifying purchases. This does not affect which products we feature.