Added capacity
up to +770kg max
extra legal GVM
Legally increase your 4WD’s load-carrying capacity with a certified Terrain Tamer GVM upgrade. Supplied, fitted and fully certified at our Kotara workshop, so your accessories, touring setup and towing stay safe, capable and compliant.
Added capacity
up to +770kg max
extra legal GVM
GVM available
up to 4150kg
model dependent
Terrain Tamer experience
50+ yrs
Aussie-made springs
Compliance
SSM certified
supply, fit, certify
Every vehicle leaves the factory with a safety margin. A GVM upgrade eats into it, so Terrain Tamer worked with engineers and governing bodies, using 3D material analysis and stress testing, to build upgrade solutions that keep an excellent margin and a quality, OEM-like feel under both heavy and light loads.
Half a century engineering 4×4 parts, with coil springs manufactured right here in Australia for consistent quality.
Terrain Tamer is the only brand offering a GVM upgrade using parabolic leaf springs, a real gain in load carrying and ride quality for leaf-sprung 4WDs.
Kits are tested and analysed to reach SSM approval, fitted pre-registration or to vehicles already on the road via the state modification process.
Terrain Tamer, When Quality Counts
As towing and load-carrying rules changed, the GVM upgrade became essential to staying compliant and protecting your insurance. Here is how Terrain Tamer engineers its GVM upgrades, and what actually changes on your 4WD. Note this is a GVM upgrade, not a GCM upgrade.
Every vehicle leaves the factory with a built-in safety margin, and a GVM upgrade encroaches on it. The further you push, the higher the risk of a failure at the worst possible moment. Terrain Tamer worked with the governing bodies and their engineers, using 3D material analysis and stress testing to learn exactly where each component fails, then built Australian-made GVM upgrades that keep an excellent safety margin, much the way the manufacturer intended.
Australian-made springs and matched shocks, built for your new GVM rather than a one-size lift.
Australian-made coils and exclusive parabolic leaf springs rated to your new GVM, front and rear.
Heavy-duty damping matched to the heavier sprung mass for control under load and off-road.
Correction kits and HD bushes that keep your geometry right at the new ride height.
Extended brake lines and braking considerations sorted as part of a compliant upgrade.
Strengthened mounts where the engineering calls for it, built for the extra work.
Where a rating requires it, we advise on the right rims and tyres for your build.
A snapshot of the most popular applications we supply and fit. Parabolic and Fortified-shock variants are available on many kits, and we cover older models too.
| Make | Model | Series | Year | OEM → TT GVM |
|---|---|---|---|---|
| Ford | Ranger PY / P703 | All | 06/2022– | 3230 → 3700kg (+470) |
| Ford | Ranger PX3 | All (exc. 2.2L XL SCB) | 8/2018– | 3330 → 3510kg (+180) |
| Toyota | HiLux GUN/KUN 125/126 | All | 5/2015– | 3150 → 3510kg (+360) |
| Toyota | LandCruiser 300 | GR / VJ / FJA300 | 7/2021– | 3280 → 4050kg (+770) |
| Toyota | LandCruiser GDJ78/79 | All | 9/2022– | 3510 → 3780kg (+270) |
| Toyota | LandCruiser GDJ78/79 | All | 9/2022– | 3510 → 3950kg (+440) |
| Toyota | LandCruiser GDJ79 | All | 2022– | 3510 → 4150kg (+640) |
| Toyota | LandCruiser VDJ76 | Wagon | 9/2022– | 3510 → 3780kg (+270) |
| Make | Model | Series | Year | OEM → TT GVM |
|---|---|---|---|---|
| Ford | Ranger PX3 | All (exc. 2.2L XL SCB) | 8/2018– | 3330 → 3510kg (+180) |
| Ford | Ranger PY / P703 | All | 9/2022– | 3230 → 3700kg (+470) |
| Toyota | HiLux GUN/KUN 125/126 | All | 5/2015– | Parabolic 3150 → 3510kg (+360) |
| Toyota | LandCruiser VDJ76 | Wagon | 1/2007–2021 | 3100 → 3520kg (+420) |
| Toyota | LandCruiser VDJ78 | Troop Carrier | 8/2012–2021 | 3300 → 3780kg (+480) |
| Toyota | LandCruiser VDJ79 | Single / Double Cab | 8/2012–2021 | 3300 → 3780kg (+480) |
| Toyota | LandCruiser VDJ78/79 | Troop / Cab | 8/2016–2021 | 3300 → 3950kg (+650) |
| Toyota | LandCruiser GDJ78/79 | All | 9/2022– | 3510 → 4150kg (+640) |
| Toyota | LandCruiser VDJ200 | GXL / VX / Sahara | 1/2015–2021 | 3350 → 3800kg (+450) |
Cannot see your vehicle, year or a parabolic / Fortified-shock option? We fit the full Terrain Tamer range. Tell us your build and we will confirm the right kit and rating.
Gross Vehicle Mass (GVM) is the legal maximum your 4WD can weigh fully loaded, and it counts everything: the vehicle itself, bull bar, winch, fuel, water, food, people and the dog.
Built into your GVM is the tow-ball mass when towing, plus a rated capacity for each axle. Add a touring fit-out and you can blow past those limits before the fridge is even packed, which risks your insurance, your warranty and an inspection. A Terrain Tamer GVM upgrade raises the legal ceiling and re-engineers the suspension to safely carry it.
Drag the slider to your loaded weight. Example only: factory 3,300 kg, upgraded 3,950 kg; figures vary by vehicle.
We are a registered Production Facility under the Second Stage Manufacturer (SSM) guidelines, so we can supply, fit and certify your vehicle's GVM increase, all under one roof. Send your details and we will get a tailored quote back to you.
Ready for a price?
Open the form with your vehicle details and we will confirm the right Terrain Tamer kit, the rating to suit your build, and an all-in, fitted-and-certified price.
At All Four X 4 Spares we are proud to be authorised dealers and fitters of Terrain Tamer GVM suspension upgrades. As a registered Production Facility under the Second Stage Manufacturer (SSM) guidelines, we can supply, fit and certify your vehicle's GVM increase, all under one roof.
Based in Kotara, Newcastle, we look after customers right across NSW, from the Hunter Region through to the Central Coast and Sydney. Whether you drive a work ute, tow a heavy caravan or run a fleet, we provide expert installation, compliance certification and tailored suspension advice so your 4WD is safe, capable and road-legal.
Unlike workshops that can only install kits, our federal SSM accreditation means we complete fully compliant, road-legal upgrades, handling the engineering approval and modification plate through to lodging paperwork with authorities such as Transport for NSW, so your increased GVM is recognised, insurable and ADR-compliant.
Drop in, talk through your build, and book your Terrain Tamer GVM upgrade with the team that fits and certifies it on-site.
An outstanding service from start to finish. This place has to be the happiest I've ever visited. From the moment you arrive to the moment you leave, smiles and absolute professionalism is for all to see. Thanks Michael for your wonderful work and the entire team who upgraded my GVM and GCM. If you need any assistance this team is for you, give them a call and you won't need to worry, as you instantly feel safe and secure that their knowledge and expertise will guide you to the right decision. Thanks team.
Would highly recommend All Four x 4 Service Centre. From the first contact with Michael to arrange the GVM upgrade, to Alex who served me on the day of upgrade and pickup the next day, all could not have been any friendlier and professional. Job done on time and even took the time to explain what had been done and what to expect. Great friendly team of staff. Dealing with your company was a pleasure from start to finish.
Thanks Adam, great service. All4x4 organised a GVM/GCM upgrade for my new D-MAX pre-rego, they liaised with the dealer and took care of all registration details. Seamless service. Very much appreciated.
It is a 4WD suspension package designed to safely increase your vehicle's Gross Vehicle Mass (GVM) rating. The kit centres on heavy-duty springs and shocks, with brake-line and reinforcement provisions where needed, tested and analysed to reach Second Stage Manufacturer approval so you can legally carry more.
A pre-registration upgrade is completed before the vehicle is first registered and is recognised nationally. A post-registration upgrade is fitted to a vehicle already on the road and certified by an engineer through the state modification process. We offer both, and will advise which suits your vehicle and timing.
GVM (how much your vehicle can weigh loaded) and GCM (vehicle plus trailer combined) are separate ratings. Terrain Tamer GVM kits raise your GVM and axle capacities. If you tow heavy, tell us and we will talk through what applies to your setup.
A properly engineered, certified and plated GVM upgrade is designed to keep you compliant, which is exactly what protects your insurance, unlike running overloaded. We will walk you through how it interacts with your specific vehicle before any work begins.
Terrain Tamer is the only brand offering a GVM upgrade using parabolic leaf springs. For leaf-sprung 4WDs they deliver a significant improvement in both load carrying and ride quality, and are available on many of our kits.
Open any Get a quote form on this page with your vehicle details. We will confirm the right kit, rating and an all-in fitted-and-certified price.
Get a tailored quote on a Terrain Tamer GVM upgrade, supplied, fitted and certified by the Hunter's 4WD specialists.