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Home » Products » JMACX 4495 Super Chassis

  • Silver 4x4 with JMACX 4495 Super Chassis

JMACX 4495 Super Chassis

The 4495 Super Chassis package from Jmacx Offroad Solutions provides a complete GVM solution for the 79 Series Landcruiser.

Jmacx have put together the 4495 Super Chassis as a complete kit including a replacement rear chassis section, coil conversion, chassis extension, full suspension upgrade, brake upgrade, fabricated rear diff housing, driveline upgrades, replacement exhaust, long range fuel tank and much more.

All of the parts in this package combined together provide the ultimate platform for building a serious offroad tourer or work vehicle due to greatly increasing the payload, GVM and towing capacity.

  • Specifications
  • Inclusions
  • Options
  • Component Information

Specifications

GROSS VEHICLE MASS (GVM)4495kg
TOWING CAPACITY
4000kg / 4500kg*
GROSS COMBINATION MASS (GCM)

8495kg / 8995kg*
FRONT AXLE LOAD RATING1645kg
REAR AXLE LOAD RATING2850kg
REQUIRED WHEEL LOAD RATING1450kg

*Automatic transmission conversion required

  • JMACX 4495 SUPER CHASSIS
  • JMACX 4495 SUPER CHASSIS
  • JMACX 4495 SUPER CHASSIS
  • JMACX 4495 SUPER CHASSIS
  • JMACX 4495 SUPER CHASSIS
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Included in the package

  • Rear Super Chassis clip
  • 300mm chassis extension
  • Inbuilt rear winch cradle
  • Coil converted rear end
  • Fabricated diff housing
  • Heavy duty driveshaft
  • Front & rear shock absorbers
  • Front & rear coil springs
  • Adjustable panhard rods
  • Adjustable control arms
  • CNC billet radius arms
  • Billet sway bar spacers
  • Braided brake line set
  • GVM compliant indicators
  • Brown Davis 185L fuel tank
  • Airbag Man airbag kit
  • Heavy duty clutch & flywheel
  • Marks 4wd hydro booster
  • Marks 4wd speedo corrector
  • Torqit 3.5” exhaust system
  • Freight for all components
  • Installation of complete kit
  • Chassis prep & painting
  • All associated engineering

Options

  • 2, 3 or 4 inch lift height
  • 33 or 35 inch tyre size
  • Remote reservoir shocks
  • Steering damper upgrade
  • Fitment of rear winch
  • Onboard airbag controls
  • Automatic transmission
4495 Options
Options

Options

  • 2, 3 or 4 inch lift height
  • 33 or 35 inch tyre size
  • Remote reservoir shocks
  • Steering damper upgrade
  • Fitment of rear winch
  • Onboard airbag controls
  • Automatic transmission

The Finer Details

Look we get it! When it comes to modifications of this calibre there is a huge amount to learn and it can often be overwhelming to understand everything. Below you will find information on all of the individual components so that you can dive deep and discover everything there is to know about the Jmacx 4495 Super Chassis.

Not much of a reader or still have questions? Feel free to get in touch with our expert sales team via our contact form to have all your questions answered!

  • Super Chassis
  • Coil Conversion
  • Chassis Extension
  • Diff Housing
  • Suspension
  • Radius Arms
  • Brake Upgrades
  • Driveline Upgrades
  • Fuel Tank
  • Exhaust
  • Wheels & Tyres
  • JMACX 4495 SUPER CHASSIS FULL BUILD

Super Chassis

The foundation of the Jmacx 4495 Super Chassis package is the replacement rear chassis clip. The process starts by stripping the rear end of the vehicle, removing the rear section of the factory chassis and welding the Jmacx super chassis into position.

To handle the additional weight from the increased GVM, the Jmacx chassis is bigger and stronger than the original design.

The replacement chassis clip also incorporates a 300mm chassis extension, inbuilt towbar and rear winch cradle.

  • JMACX 4495 SUPER CHASSIS REAR CLIP
  • JMACX 4495 SUPER CHASSIS REAR CLIP
  • JMACX 4495 SUPER CHASSIS REAR CLIP
  • JMACX 4495 SUPER CHASSIS REAR CLIP
  • JMACX 4495 SUPER CHASSIS REAR CLIP
  • JMACX 4495 SUPER CHASSIS REAR CLIP
  • JMACX 4495 SUPER CHASSIS REAR CLIP
  • JMACX 4495 SUPER CHASSIS REAR CLIP
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Coil Conversion

From factory the 70 Series Landcruiser is fitted with leaf springs in the rear. Within the Jmacx Super Chassis package is a coil conversion for the rear end, converting the factory leaf spring suspension to coil springs.

Jmacx use a five-link suspension system similar to what can be found in wagon models of Landcruiser such as the 80, 100 and 200 series.

Coil springs are known for offering superior ride comfort, improved driveability and enhanced offroad performance when compared to leaf springs.

  • JMACX 4495 SUPER CHASSIS COIL CONVERSION
  • JMACX 4495 SUPER CHASSIS COIL CONVERSION
  • JMACX 4495 SUPER CHASSIS COIL CONVERSION
  • JMACX 4495 SUPER CHASSIS COIL CONVERSION
  • JMACX 4495 SUPER CHASSIS COIL CONVERSION
  • JMACX 4495 SUPER CHASSIS COIL CONVERSION
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300mm CHASSIS EXTENSION

Incorporated into the Jmacx Super Chassis is a chassis extension which lengthens the wheelbase of the vehicle by 300mm. To accommodate for the additional chassis length, we also fit a longer tailshaft, replacement handbrake cable, new brake lines and extended fuel lines.

By extending the chassis and lengthening the wheel base the vehicle will handle better whilst also offering nicer ride comfort.

Another small bonus from the increased chassis length is additional tray or canopy space.

  • JMACX 4495 SUPER CHASSIS 300MM CHASSIS EXTENSION
  • JMACX 4495 SUPER CHASSIS 300MM CHASSIS EXTENSION
  • JMACX 4495 SUPER CHASSIS 300MM CHASSIS EXTENSION
  • JMACX 4495 SUPER CHASSIS 300MM CHASSIS EXTENSION
  • JMACX 4495 SUPER CHASSIS 300MM CHASSIS EXTENSION
  • JMACX 4495 SUPER CHASSIS 300MM CHASSIS EXTENSION
  • JMACX 4495 SUPER CHASSIS 300MM CHASSIS EXTENSION
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DIFF HOUSING

The Jmacx super chassis package includes a replacement rear diff housing. The diff housing is upgraded to a much stronger housing which is fully welded and Australian made by Jmacx.

The housing provides a mounting location for the new rear coil springs and all associated suspension components for the coil conversion.

With the installation of a Jmacx diff housing the axle capacity is increased and the rear wheel track is also widened to match the factory front wheel track.

  • JMACX 4495 SUPER CHASSIS DIFF HOUSING
  • JMACX 4495 SUPER CHASSIS DIFF HOUSING
  • JMACX 4495 SUPER CHASSIS DIFF HOUSING
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RADIUS ARMS

Front radius arms are provided with the Jmacx Super Chassis to handle additional weight and improve the vehicles handling.

Jmacx radius arms are 60% stronger than factory arms without adding any additional weight to the vehicle. Upgrading the radius arms increases castor angle to ensure the vehicle drives nicely after the suspension height is raised (which results in a loss of castor angle).

Jmacx radius arms utilise OEM bushes to maintain bush life and full range of bush movement.

  • JMACX 4495 SUPER CHASSIS RADIUS ARMS
  • JMACX 4495 SUPER CHASSIS RADIUS ARMS
  • JMACX 4495 SUPER CHASSIS RADIUS ARMS
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SUSPENSION

The suspension receives a complete overhaul with the Jmacx Super Chassis package to improve ride comfort, enhance handling, increase ride height and provide additional carrying capacity to suit the higher GVM.

The new rear coil set up is provided including springs, shock absorbers, control arms, sway bar and much more, the front suspension is also replaced.

Jmacx offer many different suspension options and components which allows for a tailored package to suit each application.

  • JMACX 4495 SUPER CHASSIS SUSPENSION
  • JMACX 4495 SUPER CHASSIS SUSPENSION
  • JMACX 4495 SUPER CHASSIS SUSPENSION
  • JMACX 4495 SUPER CHASSIS SUSPENSION
  • JMACX 4495 SUPER CHASSIS SUSPENSION
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DRIVELINE UPGRADES

Due to the increase in GVM the driveline does require some attention. Two options are available depending on the application, customer preference and budget.

The standard option is to fit a heavy duty clutch which provides an increase in clamping force over the factory clutch whilst still offering a nice pedal feel, this option results in a 4000kg towing capacity and 7995kg GCM.

Another option is an automatic transmission conversion which has a 4500kg towing capacity and 8995kg GCM.

  • JMACX 4495 SUPER CHASSIS DRIVELINE UPGRADES
  • JMACX 4495 SUPER CHASSIS DRIVELINE UPGRADES
  • JMACX 4495 SUPER CHASSIS DRIVELINE UPGRADES
  • JMACX 4495 SUPER CHASSIS DRIVELINE UPGRADES
  • JMACX 4495 SUPER CHASSIS DRIVELINE UPGRADES
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BRAKE UPGRADES

When increasing a vehicles GVM and towing large loads it is important to make sure the vehicle can brake safely.

To address the poor performance of the factory braking system in the 70 series Landcruiser, the Jmacx Super Chassis includes a Marks 4wd hydro booster and a set of braided brake lines as part of the package. The combination of these two upgrades results in a huge improvement to the vehicles braking ability to ensure it stops even when loaded to the increased GVM capacity.

  • JMACX 4495 SUPER CHASSIS BRAKE UPGRADES
  • JMACX 4495 SUPER CHASSIS BRAKE UPGRADES
  • JMACX 4495 SUPER CHASSIS BRAKE UPGRADES
  • JMACX 4495 SUPER CHASSIS BRAKE UPGRADES
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EXHAUST

Many Landcruiser owners choose to upgrade their exhaust for increased performance and a nice exhaust note.

With the complete change of geometry in the rear suspension the factory exhaust no longer fits. To take care of the fitment issue and to also offer the other benefits listed Jmacx include a Torqit 3.5 inch stainless steel exhaust system specifically designed to work with the Super Chassis and coil converted suspension. This may be DPF back or turbo back depending on application.

  • JMACX 4495 SUPER CHASSIS EXHAUST
  • JMACX 4495 SUPER CHASSIS EXHAUST
  • JMACX 4495 SUPER CHASSIS EXHAUST
  • JMACX 4495 SUPER CHASSIS EXHAUST
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FUEL TANK

Generally the Jmacx Super Chassis package is installed on work vehicles or offroad tourers which both require a decent fuel capacity. The factory Landcruiser fuel tank capacity is 130L which leaves room for improvement and results in many Landcruiser owners opting to fit a bigger tank.

When Jmacx developed the super chassis they designed it to work with the Brown Davis 185L fuel tank, the mounts are welded in place as part of the chassis and the tank comes standard in the kit.

  • JMACX 4495 SUPER CHASSIS FUEL TANK
  • JMACX 4495 SUPER CHASSIS FUEL TANK
  • JMACX 4495 SUPER CHASSIS FUEL TANK
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WHEELS & TYRES

When the axle ratings are increased for a higher GVM capacity, the wheels and tyres also need to be upgraded to a higher load rating. This is for safety reasons to ensure the wheels and tyres are capable of handling the additional weight without failure when the vehicle is loaded to GVM.

Jmacx also engineer the Super Chassis package to be legal with wider offset rims and larger tyres. The legal tyre size can either be 33 inches or 35 inches in diameter depending on suspension lift height.

  • JMACX 4495 SUPER CHASSIS WHEELS
  • JMACX 4495 SUPER CHASSIS WHEELS
  • JMACX 4495 SUPER CHASSIS WHEELS
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Check Out Our Builds

Considering a Super Chassis and a vehicle build? Check out some of the full builds below that have the JMACX 4495 Super Chassis included, or watch the video to see one of our build breakdowns.

If you are looking for more custom 4×4 inspiration, visit the main gallery.

Front view of customised dual cab 79 Series with Safari ARMAX snorkel

Auto Swapped 79 Series

2024 Toyota Landcruiser 79 Series with ATD custom barwork and Norweld canopy

Mega Landcruiser Build

Dual cab 79 series with Jmacx GVM upgrade

Like Father, Like Sons

FREQUENTLY ASKED QUESTIONS

How long does the Jmacx 4495 Super Chassis take to install?

The installation of the Super Chassis package takes approximately 3 weeks to complete. This accounts for the strip & cut of the factory chassis, installation of the replacement rear chassis section, painting & cavity waxing of the new chassis & fitment of the replacement suspension components.

What is the Jmacx 4495 Super Chassis package?

The Jmacx Super Chassis is a complete GVM upgrade package specifically designed for the 79 Series Landcruiser. The kit includes a full replacement rear chassis section incorporating a 300mm chassis extension, coil conversion, front & rear suspension upgrade, long range fuel tank, exhaust, air bags & lots more.

How much does the Jmacx 4495 Super Chassis cost?

There is no one set figure for this particular package as there are multiple different options in terms of shocks etc. Pricing generally averages around the $50,000 mark. If you would like specific pricing tailored to your requirements, please feel free to contact us.

Can the Jmacx 4495 Super Chassis be installed post rego?

This package can be installed post-registration, however there are some limiting factors associated with this. Please feel free to get in contact with us to discuss your specific requirements.

  • Enquire Now
    Silver 4x4 customised build with snorkel & canopy
  • Enquire Now
    Silver 4x4 customised build with snorkel & canopy
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Call us on 08 8532 2550

Email us via our contact form

61 Chris Collins Court Murray Bridge, South Australia

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JMACX Super Chassis

300 Series GVM

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All Products

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All Vehicles

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