The Tough Dog 40mm Lift Kit transforms your Isuzu D-Max Series 3 (2020-ON) with Australian-engineered nitrogen gas technology, customizable spring rates, and multi-stage leaf packs designed specifically for extreme loads, long-distance towing, and corrugated outback tracks. This complete 4WD lift kit delivers 40mm of additional ground clearance while maintaining exceptional on-road comfort and handling—backed by comprehensive warranty coverage and in-stock availability at our Australian warehouse. Expert suspension support included with every order for spring rate selection and fitment guidance.
Browse all compatible suspension parts for your Isuzu Dmax 2020-On | Complete 40Mm 4Wd using our parts finder.
| Make | Model | Series | Years | Engine |
|---|---|---|---|---|
| Isuzu | D-Max | Series 3 | July 2020-Current | 3.0L Turbo Diesel (4JJ3-TCX) |
| Isuzu | D-Max | Series 3 | July 2020-Current | 1.9L Turbo Diesel (RZ4E-TC) |
Fits all Isuzu D-Max Series 3 variants including SX, LS-M, LS-U, LS-T, X-Terrain and X-Rider models from July 2020 onwards. Compatible with single cab, space cab, and crew cab configurations across both diesel engine options.
Not sure if this fits your vehicle? Contact our suspension experts or check our FAQ page for personalized fitment guidance, or browse all suspension parts for the Isuzu D-Max.
Selecting the correct spring rate is critical for achieving optimal ride quality, component longevity, and maintaining your vehicle's designed suspension geometry. You must calculate your constant carry weight—this includes only permanently fitted accessories such as steel or alloy bullbars, winches, long-range fuel tanks, aluminium or steel canopies, drawer systems, dual battery setups, roof racks with awnings, and underbody protection plates. Do NOT include variable loads like passengers, camping gear, water, firewood, or towing tongue weight as these change trip-to-trip. Common front accessories include bullbars (30-80kg), winches (30-50kg), UHF antennas, driving lights, and upgraded batteries. Rear constant loads typically include canopies (70-150kg), drawer systems (50-100kg), long-range tanks (when empty, 20-40kg), and permanently mounted roof accessories. Weigh each item or use manufacturer specifications to calculate total front and rear constant weight separately—selecting springs too heavy for your actual load results in harsh ride quality and accelerated bushing wear, while springs too soft will sag and reduce usable suspension travel. When ordering, specify front coil and rear leaf spring ratings independently based on your weight distribution—contact our team with your accessory list for expert recommendations tailored to your specific D-Max build.
Professional installation by a qualified suspension specialist or experienced automotive technician is strongly recommended for this complete lift kit. The installation process requires specialized equipment including spring compressors, hydraulic jacks rated for 4WD vehicles, torque wrenches calibrated for critical fasteners, and appropriate safety stands. A comprehensive four-wheel alignment is mandatory after installation to correct camber, caster, and toe angles—incorrect alignment will cause premature tyre wear, wandering steering, and compromised handling. All fasteners must be torqued to Isuzu's factory specifications with particular attention to U-bolt torque sequences and spring mounting points. After installation, a 500km break-in period allows springs to settle and components to bed in—the vehicle may sit 45-50mm higher initially before settling to the designed 40mm specification. During this period, recheck all fastener torques and verify wheel alignment after settling. For vehicles with heavy front accessories or those regularly subjected to extreme touring conditions, consider pairing this lift with upgraded control arms to maintain optimal suspension geometry, improve caster adjustment range, and provide reinforced construction for demanding applications.
Toughdog has earned its reputation as one of Australia's most trusted 4WD suspension brands through decades of engineering excellence and real-world proving in the country's most demanding environments. Every Toughdog component is designed specifically for Australian conditions—from the searing heat and bulldust of Cape York to the salt-laden coastal tracks of Fraser Island and the bone-jarring corrugations of the Canning Stock Route. The brand's extensive testing program includes real-world validation with loaded touring vehicles, tradesman utes carrying maximum payload, and vehicles towing at GCM across tens of thousands of kilometres before any product reaches the market. Backed by comprehensive manufacturer warranty coverage and supported by a nationwide network of specialist fitment centres and experienced suspension shops, Toughdog provides the peace of mind that comes from choosing a brand trusted by grey nomad tourers, mining contractors, emergency services, and serious off-road enthusiasts across Australia. The company's commitment to Australian engineering means suspension systems are specifically valved and rated for our unique combination of long-distance highway towing, extreme heat, heavily corrugated roads, and coastal corrosion—not simply re-badged international products. Explore the complete Toughdog suspension range to see why it remains the benchmark for Australian 4WD suspension systems across utes, wagons, and SUVs.
This Tough Dog lift kit is engineered for Isuzu D-Max owners who demand more from their vehicle—tradespeople carrying heavy toolboxes, generators, compressors, and equipment who need reliable load support day after day without compromise or sagging. Adventure tourers and grey nomads will appreciate the enhanced capability for long-range fuel tanks, dual battery systems, rooftop tents, awnings, recovery boards, and expedition gear while maintaining composed highway manners during interstate journeys and comfortable ride quality on extended gravel roads. Families who regularly tow caravans, camper trailers, boats, or horse floats benefit from dramatically improved rear-end stability and reduced squat, ensuring safer weight distribution, better braking performance, and improved steering control under maximum towing loads. Mining contractors and fleet operators appreciate the proven durability and load-carrying capability for high-kilometre applications in demanding environments. For maximum load versatility and the ability to fine-tune ride height under varying loads—such as switching between empty running, payload carrying, and heavy towing—many D-Max owners pair this lift kit with airbag suspension systems that provide on-demand adjustment for different scenarios without compromising the benefits of the upgraded spring and shock package.
Ready to transform your Isuzu D-Max Series 3 with Australia's trusted suspension solution? This complete Tough Dog 40mm lift kit (SKU: TDID07N) is in stock at our Australian warehouse for fast dispatch to your door or preferred installer. Our experienced suspension specialists are available to help you select the correct front coil and rear leaf spring rates for your specific constant carry weight, answer technical questions about installation requirements, discuss compatibility with your existing modifications, and recommend complementary upgrades to maximize your build. Order your complete lift kit today and join thousands of satisfied D-Max owners who rely on Tough Dog engineering for work, touring, and adventure across Australia's most demanding terrain. Need suspension for a different vehicle or looking to upgrade other components? Browse our complete range of 4WD lift kits covering all popular makes and models, or contact our team for personalized recommendations based on your specific requirements and budget.
This Tough Dog lift kit is specifically engineered for Isuzu D-Max Series 3 models manufactured from July 2020 onwards to current production. It fits all Series 3 variants including SX, LS-M, LS-U, LS-T, X-Terrain, and X-Rider across single cab, space cab, and crew cab body configurations. The kit is compatible with both the 3.0L turbo diesel (4JJ3-TCX) and 1.9L turbo diesel (RZ4E-TC) engine options. It will NOT fit earlier Series 1 (2008-2012) or Series 2 (2012-2020) D-Max models as these have completely different suspension geometry and mounting points. If you're unsure of your exact model year or variant, contact our team with your VIN number for confirmation before ordering.
This Tough Dog kit is engineered to deliver 40mm (approximately 1.6 inches) of lift height when correctly installed and after the break-in period. Upon initial installation, you may see 45-50mm of lift which will settle to the designed 40mm specification after approximately 500 kilometres as springs compress and components bed in under normal use. The final settled height can vary slightly depending on your constant carry weight—heavier front accessories like steel bullbars and winches may reduce front lift marginally, while lighter configurations may sit slightly higher. The 40mm lift provides excellent ground clearance improvements for off-road driving, creek crossings, and rocky terrain while typically allowing fitment of 32-33 inch tyres (depending on wheel offset and minor trimming) without requiring extensive modifications to brake lines, diff drops, or steering components that taller lifts often demand.
This complete kit (SKU: TDID07N) includes everything needed for a comprehensive 40mm suspension upgrade: a pair of nitrogen gas pressurized front struts, a pair of raised front coil springs (available in multiple load ratings), a pair of multi-stage heavy-duty rear leaf springs (available in multiple load ratings), a pair of nitrogen gas rear shock absorbers, a complete rear U-bolt kit with grade 8.8 hardened steel bolts and nyloc nuts, and a rear polyurethane bush kit. You'll need to specify your preferred front coil spring and rear leaf spring load ratings based on your vehicle's constant accessory weight when ordering. Please note that extended brake lines, differential drop kits, and alignment correction components are not included and may be required depending on your specific vehicle configuration and any additional modifications.
Absolutely—this Tough Dog kit is specifically engineered to dramatically improve towing performance and stability for Isuzu D-Max owners who regularly tow caravans, camper trailers, boats, horse floats, or work trailers. The multi-stage rear leaf springs and matched nitrogen gas shock absorbers significantly reduce rear-end squat when hitched, maintaining level ride height and proper weight distribution even at maximum towing capacity. This results in improved braking performance, better steering control, reduced trailer sway, and safer handling characteristics when towing at highway speeds. The progressive leaf pack design provides comfortable unladen ride quality for daily driving, then firms up progressively under tongue weight to support loads up to the D-Max's 3,500kg towing capacity. Many caravan towers pair this kit with airbag suspension for fine-tuning ride height across different towing scenarios and payload configurations.
While this Tough Dog 40mm lift kit is designed to work with factory control arms and does not mandate an upgrade, many D-Max owners choose to fit aftermarket heavy-duty control arms for several important benefits. Upgraded control arms provide additional caster adjustment range to fine-tune steering feel and maintain optimal wheel alignment after lifting, which is particularly important for vehicles with heavy front accessories like steel bullbars and winches. They also feature reinforced construction with thicker arms and improved bushings that better handle the increased loads and stresses of touring, off-road driving, and heavy payload applications. For vehicles regularly subjected to harsh corrugations, rock ledges, extreme touring conditions, or those running maximum constant loads, upgraded control arms offer increased durability, easier alignment adjustment, and better geometry correction. Control arms can be fitted during initial lift kit installation or added later as your build progresses—consult with your installer about whether your specific use case would benefit from this upgrade based on your driving conditions and accessory weight.
Yes, a comprehensive four-wheel alignment is absolutely mandatory after installing any lift kit including this Tough Dog system. Lifting your vehicle changes suspension geometry which affects camber, caster, and toe angles—these must be corrected to manufacturer specifications to prevent premature and uneven tyre wear, wandering steering, reduced handling precision, and potential safety issues. The alignment should be performed by a qualified technician using calibrated alignment equipment after installation is complete and all components are torqued to specification. Many experienced installers recommend a follow-up alignment check after the 500km break-in period once springs have fully settled and components have bedded in, as minor geometry changes can occur during settling. Proper alignment combined with correct tyre pressures and regular rotation will ensure normal tyre wear patterns and maintain the excellent on-road handling characteristics this Tough Dog system is designed to deliver.
Selecting appropriate spring rates is critical for achieving optimal ride quality and component longevity. You must calculate your constant carry weight—only permanently fitted accessories including bullbars, winches, long-range tanks, canopies, drawer systems, dual batteries, roof racks with awnings, and underbody protection. Do NOT include variable loads like passengers, camping gear, water, or towing tongue weight as these change between trips. Weigh each accessory or use manufacturer specifications to calculate separate front and rear constant weight totals. Common front loads include bullbars (30-80kg), winches (30-50kg), and auxiliary lighting, while rear loads typically include canopies (70-150kg) and drawer systems (50-100kg). Selecting springs heavier than your actual constant load results in harsh ride quality, increased stress on bushings, and potential premature wear. When ordering, you'll specify front coil and rear leaf spring ratings independently—if you're between ratings or unsure, contact our team with your complete accessory list for personalized recommendations based on your specific D-Max configuration.
With this 40mm Tough Dog lift kit installed, most Isuzu D-Max Series 3 owners can comfortably fit 32-33 inch tyres (approximately 265/70R17 to 285/70R17) depending on wheel offset, backspacing, and whether minor trimming or guard modification is performed. The 40mm of additional clearance combined with the increased suspension travel allows larger diameter tyres without constant rubbing on suspension components, inner guards, or mudflaps during articulation. Tyre fitment is affected by several factors including wheel offset (more negative offset pushes tyres outward), rim width, and specific tyre tread pattern and sidewall profile. Some owners successfully run 33-inch tyres with appropriate wheel selection and minor plastic trim modification, while others prefer 32-inch tyres for zero modifications and maximum clearance during extreme articulation. For the largest possible tyre fitment, consider whether your constant load will cause any suspension compression that reduces effective clearance. Always test fit and cycle suspension through full articulation before finalizing tyre selection to ensure no contact occurs during off-road driving.
This Tough Dog suspension system is backed by comprehensive manufacturer warranty coverage that protects against defects in materials and workmanship, providing peace of mind for your investment. Warranty terms typically vary by component type with shock absorbers and struts generally carrying different coverage periods than springs and hardware components. To ensure warranty validity, professional installation by a qualified technician is required along with retention of proof of purchase and installation documentation including installer details and installation date. The warranty covers manufacturing defects but does not cover damage resulting from accidents, improper installation, modifications beyond manufacturer specifications, or operation outside the component's specified load ratings and design parameters. Warranty claims require inspection of the failed component to determine cause of failure. For specific warranty duration, terms, conditions, and claim procedures applicable to this kit, refer to the warranty documentation included with your order or contact our team for detailed information—Toughdog's strong warranty support and Australia-wide service network ensure you're covered wherever your travels take you.
Yes, this Tough Dog lift kit is absolutely suitable for daily driving, highway commuting, and long-distance touring when correctly specified for your constant carry weight. Unlike budget lift kits that sacrifice on-road comfort for off-road capability, this system is engineered to deliver compliant ride quality on sealed roads while providing exceptional capability when needed off-road. The nitrogen gas shock absorbers maintain consistent damping across varying temperatures and road conditions, preventing the harsh ride often associated with poorly designed lift kits. When spring rates are correctly matched to your accessory weight, the system delivers ride quality very similar to factory specifications for unladen driving, with the added benefit of dramatically improved composure when loaded or towing. Many D-Max owners report improved highway stability when towing compared to factory suspension, as the upgraded components better control vehicle pitch, body roll, and rear-end squat during high-speed towing or when carrying heavy payloads. The 40mm lift height is conservative enough to avoid significant changes to centre of gravity that would compromise cornering stability or create top-heavy handling characteristics during daily driving.
Perfect Upgrade for Our Family Adventures
Fitted this 40mm lift kit to our D-Max before our Cape York trip and couldn't be happier with the results. The ride quality is noticeably smoother on corrugations compared to stock, and the extra clearance gave us confidence on some pretty rough tracks. Installation was straightforward with all the hardware included, and the kids don't complain about the bumpy roads anymore. Well worth the investment for anyone doing regular touring with a loaded rig.(5)
Perfect Upgrade for Our Family Adventures
Finally got the Tough Dog 40mm lift kit fitted to our D-Max and couldn't be happier with how it's transformed the ute for our monthly camping trips down the coast and up into the high country. The ride quality is noticeably smoother even with a loaded canopy and rooftop tent, which the missus really appreciates on those corrugated tracks. Installation was straightforward and everything lined up perfectly, which saved time at the mechanic. Well worth the investment for anyone doing serious family touring.(5)
Solid upgrade for my work ute
Fitted this Tough Dog 40mm lift kit to my D-Max about three months back and it's been brilliant for daily site work and weekend camping trips. The ride quality is way better than stock, even with a loaded tray, and the extra clearance has already saved my diff a couple of times on rough tracks. Everything lined up perfectly during install and the shocks handle corrugations like a dream.(5)
Solid Kit for Serious Remote Travel
Been running this Tough Dog 40mm lift on my D-Max through the Simpson Desert and Cape York tracks, and it's handled everything I've thrown at it. The ride quality is surprisingly good even when fully loaded with water, fuel and recovery gear – no more bottoming out on the whoops. Fitment was spot-on with all the hardware included, which saved me a trip back to the supplier. Worth every dollar if you're doing genuine remote work.(5)
Perfect Upgrade for Our Family Adventures
Fitted this 40mm Tough Dog lift kit to our D-Max about three months back and it's completely transformed our weekend camping trips down the coast and out west. The ride quality is noticeably smoother over corrugations compared to the factory setup, and the kids actually sleep better in the back now. Really impressed with how level the ute sits even with the rooftop tent, fridge and all our gear loaded up.(5)
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