GVM Upgrade Kits

Terrain Tamer has developed GVM Upgrade solutions for popular 4WD models which, when towing or loaded with essential off-road gear, are often pushed to their GVM and axle loading limits. We have a range of upgrade kits to suit your vehicle's needs. +

Terrain Tamer GVM Upgrade Kits

Consisting of exclusive Terrain Tamer suspension components, these GVM Upgrade kits have been thoroughly tested and analyzed to reach Secondary Stage Manufacturer's approval and can be installed either prior to registration or on existing registered vehicles at approved workshops, and following state-level modification processes

With our GVM Upgrade kits, you can increase your vehicle's gross vehicle mass rating, giving you more leeway when it comes to loading up your 4x4 for your next adventure. Whether you need to add a bull bar, winch or other accessories, our GVM Upgrade kits will help make sure your 4x4 is up to the task.

What is GVM?

The Gross Vehicle Mass, or GVM, is a rating set by the original manufacturer and refers to the legal maximum weight of the vehicle. This rating incorporates the wheels, as well as everything sitting atop – that is everything from the vehicle itself, bull bars, winches, fuel, people, water, food and the dog.

Built into the GVM is also the imparted Tow Ball Mass when towing, and a Rated Axle Capacity, a limit set for how much weight should be distributed to each axle. By upgrading your 4x4's GVM, you'll have more flexibility when it comes to loading up for your next off-road trip.

How do I know if I need a GVM Upgrade?

If you're planning on adding any heavy accessories to your 4x4, or if you regularly tow a trailer or caravan, then a GVM Upgrade may be necessary. Check with your local Terrain Tamer dealer to find out which GVM Upgrade kit is right for your 4x4.

Why should I choose a Terrain Tamer GVM Upgrade Kit?

Terrain Tamer has been supplying the 4x4 industry with quality aftermarket parts and accessories for over 50 years, so you can be sure that our GVM Upgrade kits are of the highest quality. Our team of 4x4 experts have designed our GVM Upgrade solutions to be tough enough to handle whatever you throw at them, whether you're on the road or off the beaten track.

Which Makes & Models Do Terrain Tamer Manufacture GVM Upgrade Kits for?

Terrain Tamer has developed GVM Upgrade kit solutions for most popular 4WD models which, when towing or loaded with essential off-road gear, are often pushed to their GVM and axle loading limits. We have a range of upgrade kits to suit your vehicle's needs.

Here are some of the most popular:

Have questions about GVM Upgrade Kits?

Contact your local Terrain Tamer dealer today and speak to one of our 4x4 experts. We'll be happy to answer any questions you have and help you find the right GVM Upgrade kit for your needs.

Video Transcript: Terrain Tamer Uncovered | GVM Upgrades (No GCM)


Over the years, as the rules and regulations around towing and load carrying have changed, it's led to the rise of the GVM modification. This has been an awesome modification, but it has come with a bunch of confusion. Those of us who want to keep our vehicles compliant to the rules of the road, so that we don't void our insurance in the case of an accident or whatever else it may be, have really endeavoured to understand the rules and be compliant.

So, Terrain Tamer has been working with the governing bodies and their engineers to come up with a GVM upgrade solution that gives you an excellent safety margin, much the way the original equipment manufacturer designed the vehicle. By performing 3D material analysis and other stress tests, Terrain Tamer engineers have been able to understand exactly which point a vehicle component will fail when you push it to its limits. Now, with that information in mind, they've been able to create GVM upgrade solutions that have an excellent safety margin.

So why would this be important to you, the end user? Well, when a Vehicle Manufacturer designs a vehicle, they have a safety margin in there. And the moment we do a GVM upgrade, we start encroaching onto that safety margin. Now, the further into that margin that you push, the more risk there is that your vehicle will fail at a critical moment, leaving you on the side of the road. Obviously, Terrain Tamer does not want that to happen. So, they have worked with the engineers to totally understand how a vehicle is constructed, and then create the GVM upgrade solution that does not beat on your vehicle. Yet, it gives you a perfect solution that's going to give you a good heavy load carrying capacity and excellent light load carrying capacity and really do the job you need it to do.

For many years, there's not a whole heap of components that you're going to look to change when you do a GVM upgrade. Primarily, you're going to change your springs because they carry the load, and you're going to change your shock absorbers because they control the load. Other areas that may require changing are your wheels, your tires, and your braking system. When you change these components, it does change the way the vehicle handles over different road surfaces and carrying different loads. So, there's a couple of key points or considerations we need to make when we're considering a GVM upgrade. They are your front axle load, your rear axle load, your roof load off-road and on-road, your tow bar load, and the amount of weight on your trailer.

Terrain Tamer manufactures their coil springs right here in Australia, so they can maintain the quality of the springs. And they are the only company that is offering a GVM upgrade using parabolic leaf springs. And these give a significant improvement to the load carrying and ride quality of a leaf-sprung vehicle. Terrain Tamer offers GVM upgrades for many of the popular vehicles already on the market, and they're adding to that range all the time. To find out more, contact your local Terrain Tamer stockist or head on over to their website at terraintamer.com.

Terrain Tamer has a 50-year-old promise to deliver quality engineered four-wheel drive parts.

  • Registration process will be explained upon request.

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GVM Upgrade Kits FAQ

GVM upgrade kits are 4x4 suspension packages specifically designed to enhance the gross vehicle mass (GVM) rating of your 4WD. The kit includes high-quality components such as shocks, and springs that can improve off-road performance while extending the life of your vehicle. With a GVM upgrade kit, you will be able to enjoy increased safety and strength without sacrificing comfort or acceleration. It's an economical solution for anyone looking to increase their GVM ratings.

GVM upgrade kits work by replacing the components of your 4WD's suspension system with higher-quality, more durable parts. The kit typically includes new shocks and springs that are designed to accommodate greater weight loads, as well as lift blocks and piggyback reservoirs that provide additional support for heavier payloads. In addition, some GVM upgrade kits also include other components such as sway bars and steering dampers for increased on-road stability.

GVM upgrade kits offer a range of benefits for 4x4 owners. With a GVM kit installed, you can enjoy greater weight capacity with improved suspension performance and stability. This allows you to carry heavier loads more safely and confidently, as well as better handling in off-road conditions. Additionally, the components in a GVM upgrade kit are designed to last longer than standard parts, meaning less frequent repairs or replacements for improved cost efficiency over the long term. Ultimately, a GVM upgrade kit is an economical way to get more from your 4WD without sacrificing comfort or acceleration.


TOYOTA - GVM upgrades Suitable for Toyota Hilux & Landcruiser Vehicles

Hilux GUN125/126 All 05/2015- SK081GVMPR 3000 (or 3050kg Extra Cab SR/SR5 Only) 3510kg (+510kg) - Parabolic Available BUY NOW
Hilux KUN125/126 All 05/2015- SK081GVMPR 3000 (or 3050kg Extra Cab SR/SR5 Only) 3510kg (+510kg) - Parabolic Available BUY NOW
Landcruiser VDJ78/79 All 11/2022- SK0070GVMPR 3510kg 3780kg (+270kg) - Parabolic Available BUY NOW
Landcruiser VDJ78/79 All 11/2022- SK0072GVMPR 3510kg 3950kg (+440kg) - Parabolic Available BUY NOW
Landcruiser VDJ78/79 All 11/2022- SK0073GVMPR 3510kg 4150kg (+640kg) BUY NOW

FORD - GVM upgrades Suitable for Ford Vehicles

Ranger P703 All 06/2022- SK108GVMPR  3230kg 3700kg (+470kg) BUY NOW