Toughdog Heavy Duty Rear Coil Springs suit the Jeep Grand Cherokee WG/WJ (1999-2004) and are engineered with a constant-load spring rate to carry touring gear, bull bars and towing weight without sagging. Made from high-tensile spring steel to Australian quality standards, these heavy-duty coil springs restore correct rear ride height and keep the rear end level under load. Pair them with matched shock absorbers for balanced handling on highway and dirt. In stock in Australia now, backed by Toughdog's manufacturer warranty and our fitment support team.
Browse all compatible suspension parts for your Wj using our parts finder.
| Make | Model | Series | Years | Engine |
|---|---|---|---|---|
| Jeep | Grand Cherokee | WJ | 1999–2004 | 4.0L I6, 4.7L V8, 2.7L CRD Diesel |
| Jeep | Grand Cherokee | WG | 1999–2004 | 4.0L I6, 4.7L V8, 2.7L CRD Diesel |
Not sure if this fits your vehicle? Contact our suspension experts or check our FAQ page.
Choose your rear spring rate based on what sits on the vehicle permanently — a bull bar and winch up front shift weight distribution, while a canopy, dual battery tray, water tank or caravan ball weight loads up the rear. Common accessories that affect rear spring selection include roof racks with rooftop tents, long-range fuel tanks, drawer systems and towing a caravan or trailer. If you're unsure which rate suits your constant load, our team can match a spring rate to your accessory list before you order.
Fitment is straightforward for an experienced DIY installer with basic hand tools, though we recommend a qualified suspension workshop for correct spring seat alignment and torque. Wheel alignment is mandatory after fitting to correct rear camber and toe settings changed by the new ride height. Allow a 500km bed-in period for the springs to settle before a final alignment check. If you're also addressing worn bushes or geometry issues, pair this spring upgrade with control arm upgrades for correct axle alignment.
Toughdog has supplied 4WD suspension componentry to Australian tourers and tradespeople for decades, with springs and shocks developed and tested for local load and road conditions. Every rear coil spring is manufactured to a set constant-load spring rate rather than a generic one-size-fits-all curve, so the rear end sits level and rides properly under real-world weight. Backed by a manufacturer warranty, you can view the full Toughdog range to match springs, shocks and control arms from the one brand.
This spring is suited to Grand Cherokee WG/WJ owners who tow a caravan or trailer, run a canopy and drawers for work, or carry camping gear for touring trips. Tradespeople with a constant tool and equipment load, and tourers packing recovery gear and water, will notice the rear sitting level again instead of sagging. If your accessory load varies trip to trip, also look at airbag suspension to fine-tune rear height on the go.
These Toughdog rear coil springs are in stock in Australia now for fast dispatch, backed by a manufacturer warranty and fitment support from our team. Browse our full lift kit range if you're planning a complete front and rear suspension upgrade for your Grand Cherokee.
New to Jeep suspension? Read our guide to common Jeep suspension problems and how to fix them.
Yes, these Toughdog Heavy Duty Rear Coil Springs are a direct-fit replacement for the Jeep Grand Cherokee WG and WJ built from 1999 to 2004, covering the 4.0L I6, 4.7L V8 and 2.7L CRD diesel variants. They bolt into the factory rear coil towers with no cutting or drilling required. If you're unsure of your exact series or build date, check your compliance plate or use our parts finder for the Grand Cherokee. Our team can also confirm fitment over the phone or by email before you order.
These are heavy-duty rear coil springs, not a dedicated lift spring, so their primary job is restoring correct factory ride height and carrying a constant rear load rather than raising the vehicle beyond standard. If your WG/WJ has sagged from age or towing, fitting these springs will bring the rear back up to its proper height. For a specific lift figure alongside a raised spring, speak with our team about a matched front and rear setup. We can advise the right combination based on your accessories and towing weight.
This kit includes 2 x Toughdog Heavy Duty Rear Coil Springs manufactured from high-tensile spring steel with a corrosion-resistant coating. It covers both left and right rear spring positions as a pair. Shock absorbers, bushes, U-bolts and control arms are not included and are sold separately. See the full kit contents list above for exact details.
Yes, these springs are built with a constant-load spring rate specifically for vehicles carrying towing weight, bull bars, canopies or camping gear day to day. They're designed to stop the rear end sagging under a caravan or trailer ball weight and keep the vehicle sitting level. For heavier or highly variable towing loads, pair these springs with matched Toughdog shock absorbers or consider airbag suspension for adjustable support. Our team can help match a spring rate to your specific tow ball weight.
Control arms aren't mandatory with a ride-height-restoring rear spring like this one, since it doesn't significantly alter suspension geometry beyond standard. However, if your WG/WJ has worn rear control arm bushes or you're addressing handling issues at the same time, upgrading the control arms is worth doing while the rear end is apart. This keeps axle alignment and bump-steer characteristics correct. Ask our team for a recommendation based on your vehicle's condition and use.
Yes, a wheel alignment is mandatory after fitting new rear coil springs, as ride height changes affect rear camber and toe settings. We recommend allowing a 500km bed-in period for the springs to settle before the final alignment is done. Skipping alignment can lead to uneven tyre wear and altered handling. Book your alignment with a qualified workshop straight after installation for best results.
Toughdog manufactures rear coil springs to a constant-load spring rate matched to typical WG/WJ accessory and towing weights. If your vehicle carries a heavier or lighter constant load than standard — for example a permanent canopy and drawers, or a lighter unladen setup — contact our team before ordering. We can advise whether this spring rate suits your load or point you to an alternative rate. Getting this right up front avoids a sagging or overly firm rear end.
Because these springs restore rather than substantially raise ride height, tyre clearance is largely unchanged from factory. If you're planning to fit larger tyres, check clearance at full steering lock and full suspension compression before committing to a size. Combining these springs with a genuine 4WD Suspension lift kit will give more clearance for larger tyre fitment. Our team can advise on tyre size limits for your specific WG/WJ setup.
These Toughdog rear coil springs are covered by Toughdog's manufacturer warranty against manufacturing defects. Exact warranty terms are confirmed at the time of purchase and vary depending on whether the vehicle is used for touring, towing or daily driving. Keep your proof of purchase and fitment records in case a warranty claim is needed. Our team can talk you through the warranty process if you ever need to make a claim.
Yes, these rear coil springs are designed to maintain on-road comfort while adding load-carrying capacity, so they're suitable for a WG/WJ used as a daily driver as well as a tow vehicle or tourer. Because they restore correct ride height rather than lifting the vehicle well beyond standard, handling and ride feel stay close to factory character. Owners running a constant load such as a canopy or bull bar will notice the rear sitting level on the daily commute too. If you mostly drive unladen, ask our team whether a standard-rate spring suits you better than the heavy-duty option.
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