4WD UPGRADES

If you are located in WA and need quality upgrades to your Toyota LandCruiser or Dodge Ram, you have come to the right place.

You may be looking for increased load or towing capacity, and better driving performance for your 4WD through a GVM/GCM upgrade, coil conversion or chassis extension.

Swank is Perth's only authorised JMACX installer for coil conversions, chassis extensions and 6x6 conversions.

We offer JMACX upgrade packages to 70 Series and 200 Series LandCruisers and Dodge Ram 1500 Pickups. All 200 Series and 6x6 coil conversion packages are designed and certified through Australian Expedition Vehicles.

There are many choices and options to ensure your upgraded vehicle meets your requirements and remains safe and legal.

We are here to guide you through the process.

If you have 4WD upgrade questions, feel free to come into the workshop during business hours, or simply click below to secure a fixed appointment time.

GVM / GCM upgrades

Often the first reason for upgrading a recreational or work vehicle is to increase the maximum weight the vehicle can safely and legally carry or tow.

The maximum total weight a fully loaded vehicle can safely and legally carry is known as its 'Gross Vehicle Mass'. The maximum total weight of the vehicle and its trailer is referred to as its 'Gross Combination Mass'.

A vehicle's maximum legal GVM and GCM rating is calculated, tested and certified by its manufacturer.

Driving an overloaded vehicle is not only dangerous for its driver and other road users, but also causes mechanical failure not covered by warranty, as well as legal and insurance issues.

To increase the GVM and GCM of a vehicle, there are many parts that need to be replaced or modified. Many additional factors need to be considered such as suspension systems, axle  and wheel load capacity, as well as modification to the vehicle's electrical and braking systems.

Swank performs GVM/GCM upgrades using engineered solutions from JMACX, that when installed correctly from an authorised and experienced JMACX installer are legally certified.

Packages are available for Toyota LandCruiser 70 and 200 Series, and Dodge Ram 1500 Pickups. Many customer will choose packages that also include coil conversions and chassis extensions.

All 200 Series upgrades are designed and certified through Australian Expedition Vehicles.

See the JMACX website for full package details.

Coil conversions

Another popular upgrade to 4WD vehicles is the conversion of its standard manufacture suspension parts into an advanced leaf or coil spring suspension system.

These advanced suspension systems provide smoother onroad handling, and better offroad performance with increased ground clearance. This provides comfort to an otherwise rugged work vehicle.

As authorised installers of JMACX coil conversion packages, Swank can simply swap out your LandCruiser's factory suspension, or at the same time extend or even upgrade the vehicle chassis.

As the industry leader giving you the strongest coil conversion in the market, JMACX packages will always maintain the manufacturers original brake towing capacity.

Many customers also choose to carry out a GVM/GCM upgrade at the same time as a coil conversion. See the JMACX website for all options and full package details.

All 200 Series and 6x6 coil conversion packages are designed and certified through Australian Expedition Vehicles.

See the JMACX website for full package details.

Chassis extensions

In addition to GVM/GCM upgrades and coil conversions, many customers will extend the length of their vehicle chassis.

The standard weight distribution of a vehicle is very rear heavy. This gives poor off-road performance, especially when a vehicle is under heavy load.

By moving back the position of the rear axle, a vehicle's load distribution is shared more evenly with the front axle. This upgrade will improve vehicle drive handling and provide a smoother more comfortable ride.

An extended chassis will also allow greater tray space.

Extensions are done by cutting the existing chassis and spreading it apart, or replacing it altogether. The tail shaft, wiring, brake and fuel lines is also then extended.

The parts for chassis extensions are also provided by JMACX packages. With many customers opting to combine them with GVM/GCM upgrades and coil conversions.

All 6x6 chassis extension packages are designed and certified through Australian Expedition Vehicles.

JMACX upgrade packages

JMACX is the industry leader for coil conversions and GVM/GCM upgrades.

We offer JMACX upgrade packages to 70 Series and 200 Series LandCruisers and Dodge Ram 1500 Pickups. All 200 Series and 6x6 coil conversion packages are designed and certified through Australian Expedition Vehicles.

JMACX upgrades provide the highest axle load rating in Australia, allowing you to load and use the full potential of your vehicle. JMACX will also give you the strongest coil conversion on the market with unrivalled stability and handling.

With hundreds of conversions done in commercial, military, outback tourers and work vehicles, combined with millions of kilometres driven in some of the worlds harshest condition, this patented kit has proven itself to go above and beyond. No wonder it is the worlds number one trusted coil conversion, and Australia’s only bolt in conversion.

SWANK is Perth's only authorised installer for all JMACX packages. The perfect  team to perform your vehicle upgrade.

We will also install Norweld trays and canopies with JMACX packages.

Here are some of our most popular JMACX upgrade packages:

  • LC70 Series 3900 and 4200 GVM Leaf Spring
  • LC70 Series 3900 and 4200 GVM Coil Conversion
  • LC79 Series 4495 GVM Coil Conversion
  • LC79 Series 4495 GVM 6×6 Coil Conversion
  • LC79 Series 5800 GVM 6×6 Coil Conversion
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Alternatively, if you simply want to talk through your options, feel free to come into the workshop during business hours, or click below to secure a fixed appointment time.

Want to talk about your ideas with a qualified 4WD technician?

If you have 4WD upgrade questions or customisation ideas, feel free to come into the workshop during business hours, or simply click below to secure a fixed appointment time.

Interested in a custom tray body or canopy to fit your lifestyle?

Our aluminium fabrication team can design and build custom tray and canopies complete with drawers, toolboxes, water tanks and more. Let's discuss your ideas.

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Looking for supply and install of quality 4WD products?

We supply and install the top 4WD accessories including Boss Aluminium, ATD bullbars, Clearview mirrors, Carbon Offroad winches, Torqit exhausts, and much more.

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