The Toughdog Heavy Duty rear leaf spring pair for the Nissan D40 Navara (2005-2015) uses an extra leaf over the standard-replacement Toughdog pack to lift constant load capacity for canopies, trays, bullbars and touring accessories. Each spring is manufactured to restore factory ride height on a sagged Navara and hold that height under sustained rear-end load, not just when the tray is empty. Pair the springs with matching shock absorbers for correct damping at the new spring rate. Australian designed, backed by manufacturer warranty, and dispatched from local stock with fitment guidance from our team.
Browse all compatible suspension parts for your Rear Leaf Springs Nissan D40 Navara using our parts finder.
| Make | Model | Series | Years | Engine |
|---|---|---|---|---|
| Nissan | Navara | D40 | 2005-2015 | 2.5L TD / 3.0L V6 TD / 4.0L V6 Petrol |
Not sure if this fits your vehicle? Contact our suspension experts or check our FAQ page. You can also browse all suspension parts for the Nissan Navara D40 using our parts finder.
Choosing the right rear spring comes down to what you carry day to day, not just what's fitted at the time of purchase. A Heavy Duty pack like this one suits utes running a steel canopy, tray back, dual-cab tourer setup, or a rear bar and long-range fuel tank. If your Navara only carries occasional loads or stays mostly unladen, a standard-replacement pack will ride more comfortably — talk to our team about which pack matches your accessory list.
Fitting rear leaf springs on a D40 Navara is a job for an experienced DIY installer with a workshop press or a 4WD suspension fitter — U-bolts and spring bushes need correct torque to avoid premature wear. A wheel alignment is mandatory after fitment since ride height and axle position change. Allow a 500km bedding-in period before final alignment for the leaves to seat properly. Consider pairing this kit with upgraded control arms if you're also lifting the front end, to keep front and rear geometry matched.
Toughdog has supplied 4WD suspension to the Australian market for decades, with leaf springs specified against local load and road conditions rather than generic overseas templates. Every Toughdog leaf spring is backed by a manufacturer warranty and supported by our in-house fitment team for Navara-specific questions. You can view the full Toughdog range to compare shocks, coils and leaf springs from the same brand.
This Heavy Duty pack suits tradespeople running a tray or canopy, tourers packing a rear drawer system and long-range fuel, and anyone towing a box trailer or camper on a regular basis. If you're chasing adjustable load support rather than a fixed spring rate, our airbag suspension range is worth comparing for variable loads.
In stock in Australia and dispatched fast from local warehouses, with our suspension team on hand to confirm fitment before you buy. Browse our full lift kit range if you're planning a front-end upgrade to match.
New to Navara suspension? Read our guide to common Navara suspension problems and how to fix them.
Yes, this Toughdog Heavy Duty rear leaf spring pair is specified for the Nissan D40 Navara built between 2005 and 2015, covering the 2.5L turbo-diesel, 3.0L V6 turbo-diesel and 4.0L V6 petrol variants. Fitment is via the factory U-bolt and spring eye mounting points, so no chassis modification is needed. If you're running a different Navara series such as the D22 or D23/NP300, this specific spring will not fit — check our parts finder or contact our team first. We can confirm compatibility against your exact build date and rear axle setup before you order.
This is a Heavy Duty leaf spring, not a dedicated lift kit, so its main job is restoring ride height on a Navara that has sagged from age or constant load. On a vehicle with worn factory springs you can expect the ride height to be restored to near-original, and in some cases a modest lift of around 1" over a sagged spring once fitted and settled. Actual height gained depends on how much your current springs have dropped and what you're carrying in the tray. Our team can advise on expected height based on your current setup.
The kit includes two Toughdog Heavy Duty rear leaf springs sized for the D40 Navara, a matching set of U-bolts, spring eye bushes, centre bolts and fitting instructions. Shackles and shock absorbers are not included as standard — check your existing hardware condition before fitting, since worn shackle bushes should be replaced at the same time. If you need shocks to match the new spring rate, our team can recommend a compatible Toughdog shock. Everything supplied is sized specifically for this vehicle, not a generic universal fit.
Yes, the Heavy Duty pack is built for Navara owners who tow trailers, caravans or boats regularly, since the extra leaf helps the rear end hold height under hitch load. This reduces rear sag and keeps headlights and vehicle geometry more level while towing. For very heavy or variable towing loads, some owners pair this spring with airbag suspension for adjustable extra support. Talk to our team about your typical tow weight so we can confirm this is the right spring for your setup.
Rear leaf springs don't require a control arm change since the D40 Navara uses a leaf-sprung rear axle, not control arms at the rear. If you're also lifting the front end with coil springs, upgraded control arms can help correct front suspension geometry and CV angles at a raised height. For a rear-only leaf spring fitment like this one, no control arm work is needed. Our team can advise if you're planning a front lift alongside this rear spring upgrade.
Yes, a wheel alignment is required after fitting these rear leaf springs because ride height and rear axle position change once the new springs are loaded. We recommend allowing a 500km bedding-in period first so the leaf pack settles into its final position. Skipping alignment can lead to uneven tyre wear and inconsistent handling, especially at highway speed. Book your alignment with a shop familiar with 4WD leaf spring setups for the most accurate result.
Toughdog offers the D40 Navara rear leaf spring in different load-capacity variants, with this listing being the Heavy Duty option for accessory-loaded and towing setups. If your Navara runs lighter, mostly unladen, a standard-replacement pack may ride more comfortably day to day. The right choice depends on what you're carrying constantly — canopy, tray, bullbar, winch, and touring gear all add to that figure. Contact our suspension team with your accessory list and we'll confirm the best-matched spring rate.
Since this spring mainly restores ride height rather than delivering a large lift, tyre clearance gains are modest compared to a dedicated lift kit. Depending on your current tyre size and any rubbing at full compression, a small increase in tyre diameter may clear once ride height is restored. For a bigger tyre upgrade, you'll likely need this rear spring paired with front-end lift components — browse our lift kit range for options that suit larger tyre fitment. Always check clearance at full steering lock and full bump before committing to a tyre size.
This Toughdog Heavy Duty rear leaf spring pair is covered by the Toughdog manufacturer warranty against manufacturing defects. Warranty terms are supported directly through 4WD Suspension, and our team can talk you through the claim process if you ever need it. We dispatch from Australian stock so replacement parts, if required, don't involve long overseas wait times. Keep your purchase invoice and fitment date on file for any warranty claim.
Yes, this Heavy Duty leaf spring is designed to retain a factory-style ride on a Navara used for daily driving, work, and touring, not just occasional heavy loads. The leaf pack is stiffer than a standard-replacement spring, so an unladen ride will feel firmer at the rear than stock, particularly on rough roads with no load in the tray. If your Navara runs empty most of the time, a standard-load spring will likely suit daily comfort better. Our team can help you weigh up ride comfort against load-carrying needs based on how you actually use the vehicle.
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