Whether 'Commercial' or 'Expedition', 6x6 AUSTRALIA vehicle GVM/GCM upgrades provide parallel safety in all Payload Capacity & Tow-rate increases

Want greater peace of mind in Safety for both On-road AND Off-road with your Heavy Payload or Trailer/Caravan unit?


Need greater Payload capacity?


Want more space or tray length than your standard 4×4?


You’ve come to the right place…

Our 6×6 conversions offer effective solutions to the various requirements our customers demand with weight capacity upgrades; various Custom-built Differential, Axle, and Drive-line Enhancements for strength and reliability; and any High-Class, Custom-built and bespoke Bodymaking requirements your vehicle has.


Essentially, 6×6 AUSTRALIA  conversions have three main modification segments.

1)- Chassis & Suspension systems;

2)- Drive-line systems; and

3)- Bodyworks.


Our extensive list of ADR-compliance with the Suspension and Driveline Systems we’ve designed and developed since 1984, and their associated Federal ID Plate Approvals (IPAs) that go to certifying our work, all provide our clients prestigious yet affordable options to suit individual budgets and personal preferences in whichever base vehicle is chosen to convert to 6×6. Our IPAs allow your vehicle to be registered for road use in any State or Territory in the country.

For most of the models we convert to 6×6 won’t require an Engineer’s Certificate for the Modification in order to make it legal. Our IPAs cover this, and not only for you, but for when you go to sell the vehicle it will hold it’s resale value and be easier to sell.


We convert most popular Mid-sized 4×4 models like Ford Ranger, Mazda BT-50, Toyota Hilux, Nissan Navara, Mitsubishi Triton, and Large-sized models like Toyota Landcruiser, Mercedes-Benz G-Wagen, Nissan Patrol, Ford F-trucks, Iveko Daily 5500 4×4, Mercedes-Benz Sprinter 4×4 & 4×2 (to Bogie-drive), Mercedes-Benz Unimog and the list goes on…




Click the links below for 3D CAD image of latest addition to the 6×6 AUSTRALIA Pty Ltd Workhorse stables, our above-Mil. Spec. 6×6 Rear Suspension and Driveline assembly:

Mercedes G-Wagen Rear Bogie-drive Suspension (forward angle underneath)

Mercedes-Benz G-wagen Bogie-drive Suspension (rearfacing overhead profile)


Newly fitted Bogie-drive suspension system showing extreme wheel articulation ability
Recurved Loadshare beam with coil-springs is mounted to Suspension Cradle and has the ‘A-arm’ Diff locators in the middle
6×6 AUSTRALIA’s fully balanced (50/50) Loadsharing Coil Spring fully assembled “Rolling Bogie”, ready for final chassis installation
Recurved Loadshare Beams are handmade, seen here with purpose-built Tapered-wire Coil Springs bolted in
6×6 AUSTRALIA’s Heavy Duty Suspension components (Lifetime Warranty)





Click the link below to see 3D CAD image our Bogie-drive Suspension & Driveline systems:


Drive-through Diff with Power-divider components for Mazda BT-50 6×6
6×6 AUSTRALIA’S ‘Roller-drive Power-divider’. The control centre for the bulk traction of the 4 rear wheels under power. There is a lot of physical force driven down into the track in that short space between these 4 rear wheels. Our Power-divider keeps the axles from killing each other or “Sacrificing” one of their group (there are 4 axles total in the Bogie-drive assembly. One for each wheel), and keeps the wheels driving the vehicle along with optimal control (instead of having to rely on momentum).


6×6 AUSTRALIA’S ‘Drive-through Diff’ (6×6 Mazda BT-50 model pictured here) with integrated ‘Roller-drive Power-divider’ inside.

6×6 AUSTRALIA’s Roller-Drive Power-Divider. One simple and ingenious piece of natural & intuitive Automotive Engineering that fits inside our Drive-through Diff!

Originally invented in the 1990s by our Founder and Chief Executive, Mr. Bob James, this simple yet sophisticated piece of homegrown Aussie Automotive Ingenuity has many broad and diverse applications.

For more info on this, see our Future Concept Designs page. We at 6×6 AUSTRALIA Pty Ltd are currently finalizing successful trials (2017) of our Roller-drive Power-divider in the ZAMBONI Corp. USA and their Ice-resurfacing machines. It works to help solve challenges there in balancing traction requirements for working on Ice-skating Rinks with maneuverability when off ice, in order to avoid suffering drive-line damage.

Applications in Top Fueler Drag-racing and High-speed off-road 4×4 racing machines are also set for the coming year (2018).



Australian Design Rule (ADR) and legal compliance of vehicle modifications:

Australian Design Rules (ADRs) are rules that legally bind Automotive Engineers in vehicle design and manufacture to design safe and reliable vehicles for Australian roads.

All 6×6 AUSTRALIA’s conversions have ADR compliance and Federal ID Plate Approvals (IPAs) with IPA numbers certifying our 6×6 Suspension and Drive-line modifications around the country.

We have Federal IPAs for most of our conversions, a long-winded and expensive process of Engineer Testing and Certification paperwork through Federal Dep’t of Infrastructure, Regional Development, and Cities in Canberra that took us years to achieve. Once we put our plate on your converted vehicle, it stays there for the life of the conversion and is recognized Australia-wide for Rego purposes.

These IPAs are not just given away to anyone with a MIG & a Makita out in their back shed, and some keen impetus to see their ute modified. Not that easy! Our IPAs were hard fought and won over the prior 3 decades of continual R&D with much Brake testing, Weight testing,  Chassis Beam-Stiffness testing, Weld testing, this testing, and that testing, with our long-suffering Automotive Engineer Signatory, Mr. Alan Marburg  (‘All Vehicle Compliance’, QLD.)

This following list shows the 6x6s we have IPAs for.

Most of these models aren’t available in 6×6 from anywhere else in the world! We have been in this game for decades…


1) – Toyota Landcruiser 70 series 6×6 (current model LC70, LC75, LC76, LC78, LC79) for Medium/Lightweight GVM/GCM (Federal ID Plate #43189), and for Heavyweight GVM/GCM (Federal ID Plate #46527);

6×6 Toyota Landcruiser 79 with custom Flatbed tray body.

2) – Toyota Landcruiser 200 series 6×6 (current model LC200) for Heavyweight GVM/GCM (Federal ID Plate #48397);

6×6 Toyota Landcruiser 200 with flatbed tray body awaiting RV/Camper fitout

3) – Nissan Patrol GU 6×6 (previous model Y61) for Medium/Lightweight GVM/GCM (Federal ID Plate #47606), and for Heavyweight GVM/GCM (Federal ID Plate #47607);

Nissan GU Patrol 6×6 with Flatbed tray body

4) – Mazda BT-50 6×6 (current model) for Medium/Lightweight GVM/GCM (Federal ID Plate #47852); and

6×6 Madza BT-50 with Flatbed awaiting fitout of RV/Camper body

5) – Ford Ranger 6×6 (current model) for Medium/Lightweight GVM/GCM (Federal ID Plate #48853).

New 6×6 AUSTRALIA models currently having our Suspension and Drive-lines adapted for ADR compliance and individual IPAs (in 2018) include:

Iveco Daily 5500 6×6 (current model) in Heavyweight configuration 8,000kgGVM;

Mercedes-Benz Sprinter 6×6 (current model) in Medium-Lightweight 4,495kgGVM and Heavyweight 8,000kgGVM;

– Mercedes-Benz G- Wagen 6×6 (current model) in Heavyweight configuration 7,200kg GVM;

Toyota Hilux 6×6 (current model SR5) in Medium/Lightweight configuration 4,495kgGVM;

Nissan Navara 6×6 (current model) in Medium/Lightweight configuration 4,495kg GVM;

Ford F150 6×6 (current model) for Light, Medium, &/or Heavyweight GVM/GCM; and

Ford F350 6×6 (current model) for Heavyweight 8,000kgGVM/GCM.


IPAs decrease the paperwork burden and the tyranny of Insurance & Registration costs for your truly superior new vehicle.

Other 6×6 providers require their modifications to be legally certified individually by a licenced ethical signatory (A Professionally registered Automotive Engineer), one of the expensive hidden costs we don’t have to add to our longstanding products and services for our customers. Individual Engineer’s Certificates are also much less scrutinized for safety and legitimacy than is Federal ADR Compliance IPAs. It really depends on the ethics of the individual engineer doing the certificate, whereas with Federal IPAs it’s up to the guys at the Department of Infrastructure, Regional Development, and Cities in Canberra who double-check our Engineer’s Test reports.

Other expensive hidden costs which other 6×6 provider’s designs can’t evade include excessive tyre-wear. This excessive ‘Scrubbing’ of rear tyres is due to the fact their Bogie-drive Suspension systems refuse to allow the axes to communicate with each other because there is no effective ‘Applied Loadshare’ between these rear 2 axles.

6×6 Australia’s Coil Spring Suspension with Loadshare Beams and Diff-Locating ‘A-Arms’ & Lower Control Rods (an International Registered Design) incorporates a mechanically integrated ‘Roll-Steer’ function, allowing the tyres to maneuvre under basic physical forces (Inertia, Gravity, and Centrifugal) from the Payload as the vehicle corners. Also, in combination with our ‘Roller-drive’ Power-divider, the Coil Spring Suspension works to reduce tyre wear. It’s very subtle and difficult to describe without a proper demonstration, which helps explain these concepts further. Contact us to organize a personal demonstration for you.