Toughdog Heavy Duty Rear Coil Springs are engineered specifically for the Toyota FJ Cruiser (GSJ15R, 2011-2016) sold new in Australia, built to carry constant accessory loads like bull bars, drawer systems and dual battery trays without sagging the rear end. Sold as a pair (SKU 9354), these heavy duty coil springs use a firmer wound rate than the factory spring to hold ride height under load while keeping highway and corrugation comfort intact. Backed by Toughdog's manufacturer warranty, they're in stock in Australia now with fitment support from our team.
| Make | Model | Series | Years | Engine |
|---|---|---|---|---|
| Toyota | FJ Cruiser | GSJ15R | 2011-2016 | 4.0L V6 petrol (1GR-FE) |
Not sure if this fits your vehicle? Contact our suspension experts or check our FAQ page.
Choose a spring rate that matches what you're carrying day-to-day, not just what's fitted for a weekend trip. Constant rear loads that affect spring selection include a steel or alloy bull bar and winch up front, plus rear drawers, a canopy, long-range fuel tank, dual battery tray, water tank or a fitted tow ball load out back. Heavier constant loads generally call for a firmer heavy duty rate like this pair, while lighter accessory loads may suit a standard or medium-rated spring instead.
Fitment is a routine suspension job for an experienced 4WD workshop, or a competent DIY installer with the correct spring compressors and jacking safety gear. Wheel alignment is mandatory after fitting, since ride height and suspension geometry change once the new springs are loaded. Allow a 500km bed-in period for the springs to settle before a final alignment check. If you're also addressing camber or caster changes at the rear, ask about matching control arm upgrades to keep drivetrain and diff angles correct.
Toughdog has built a name in the Australian 4WD market on suspension parts designed around local roads, from corrugated outback tracks to wet coastal highways. Every Toughdog spring and shock in our range is backed by a manufacturer warranty and supported by our in-house fitment team, so you're not left guessing on compatibility. Tradespeople, tourers and caravan owners across Australia run Toughdog gear because it's built to carry a load without turning the daily commute into a chore - view the full Toughdog range for matching front springs, shocks and control arms.
This pair suits FJ Cruiser owners running a fitted canopy, drawer system, dual battery or long-range tank who've noticed the rear end sitting low under load. It's also a solid pick for tradespeople carrying tools and gear daily, and tourers towing a camper or small caravan. If your load varies a lot trip to trip, it's worth comparing this fixed-rate heavy duty spring against airbag suspension, which lets you dial load support up or down on demand.
These Toughdog Heavy Duty rear coil springs for the Toyota FJ Cruiser are in stock now for fast dispatch across Australia, with our team on hand for fitment questions before you order. Browse our full lift kit range if you're planning a complete front and rear suspension upgrade alongside this rear spring pair.
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Yes, this pair is built for the Toyota FJ Cruiser GSJ15R sold new in Australia from 2011 to 2016. It's designed as a direct factory-fitment replacement, so no cutting or bracket modification is needed. If you're running any aftermarket rear coil conversion or a non-standard chassis setup, check with our team first. We can confirm fitment against your build date and rear axle configuration before you order.
This is a heavy duty load spring, not a raised lift spring, so it's designed to hold factory rear ride height under a constant accessory load rather than add extra height. Where a standard spring might sag under a bull bar, drawers or a long-range tank, this firmer rate keeps the rear sitting at its intended height. If you want additional lift as well as load support, talk to our team about pairing this with a front lift kit and matching rear shocks.
You get 2 x Toughdog Heavy Duty rear coil springs, wound from high tensile spring steel with a corrosion-resistant finish. They fit onto the factory-style spring seats without extra brackets or hardware. Rear shock absorbers, U-bolts and control arms are not included and are sold separately if you need them.
Yes, the heavy duty rate is designed to support constant rear loads including tow ball download from a trailer or small caravan. It works alongside your existing or upgraded rear shock absorbers to control that added weight rather than just holding it up statically. If your tow ball weight varies a lot between trips, ask us about spring rate options to suit your typical loaded weight.
Not usually for a rear spring-only fitment on the FJ Cruiser, since the change in ride height and geometry is minor compared to a full lift kit. If you're combining these rear springs with a front lift or you notice rear axle angle changes after fitting, our team can advise on control arm upgrades to correct geometry. It's worth mentioning your full accessory list when you order so we can flag anything relevant.
Yes, a wheel alignment is mandatory after installing these springs. Ride height and suspension geometry shift once the new springs are loaded and settled, so alignment should be done after the 500km bed-in period for an accurate result. Skipping this step can lead to uneven tyre wear over time.
Toughdog offers rear coil springs across a few load ratings for the FJ Cruiser platform, from standard through to this heavy duty pair. The right rate depends on what you're carrying constantly - a fitted canopy and drawers need more support than an unmodified vehicle. Contact our team with your accessory list and we'll confirm whether this heavy duty rate or a lighter rate suits your setup better.
Since this spring pair maintains factory ride height rather than adding significant lift, tyre clearance won't change much on its own. If you're planning larger tyres, that's more a function of a front lift kit and any wheel arch modifications than these rear springs alone. Ask our team about pairing this pair with a front suspension lift if bigger tyres are the goal.
These springs are backed by Toughdog's manufacturer warranty, supported directly by our team here in Australia. If you have any concerns after fitting, contact us and we'll work through it with you and Toughdog directly. Keep your proof of purchase and fitment date on file for any warranty claim.
Yes, these springs are built to balance load-carrying capacity with everyday comfort, not just off-road or towing duty. Unloaded, the ride will feel firmer than a sagging factory spring, but it's tuned to still be comfortable on the daily commute and highway runs. Owners running a bull bar, drawers or dual battery tray as permanent fitments will notice the biggest improvement in ride height and control.
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