JMACX GVM Upgrades – LandCruiser 78 Series Troopy

3,900 kg · 4,200 kg · Coil conversions · Fitted & certified in-house at Smeaton Grange

JMACX GVM for your Troopy

A fitted-out Troopy is one of the heaviest touring vehicles on the road – drawers, kitchens, water, fridges and pop-tops all add up. JMACX coil conversions turn the 78 into a vehicle that carries that weight legally and rides properly doing it, on both the VDJ V8 and the new 1GD.

Every package is federally approved, fitted by our own technicians and supplied with the compliance and speedo correction paperwork, whether your vehicle is new or already registered.

JMACX GVM upgrade LandCruiser 78 Series Troopy fitted at Project Overlander

Choose your package

Coil conversion – 3,900 kg

VDJ & 1GD

Touring Troopies that want coil ride quality and a solid payload increase.

See specs & inclusions

Coil conversion – 4,200 kg

1GD

Full campervan and expedition fit-outs that need the extra front axle capacity.

See specs & inclusions

Specifications

	Coil conversion 3,900 kg	Coil conversion 4,200 kg
GVM	3,900 kg	4,200 kg
Front axle	1,480 kg	1,550 kg
Rear axle	2,850 kg	2,850 kg
Braked towing	3,500 kg (VDJ); 1GD confirmed at quote	Confirmed at quote
Lift	2–4 inch	2–4 inch
Tyres	33–35 inch*	33–35 inch*
Approval	SSM 48554 (VDJ) / 61677 (1GD)	SSM 61677

*Towing and tyre size depend on your vehicle, transmission and wheel and tyre package. Higher axle loads need load-rated wheels and tyres; we confirm the exact figures for your vehicle before you book.

Coil conversion – 3,900 kg GVM

Suits: VDJ & 1GD · Best for: Touring Troopies that want coil ride quality and a solid payload increase.

What's included

3 Inch Troopy coil conversion kit (DPF)
Fully welded bolt-in structural cradle and side plates
JMACX heavy duty adjustable lower and upper control arms
JMACX heavy duty adjustable front and rear panhards
JMACX track-correction fabricated coil diff housing (3,000 kg rated, under-rated to 2,850 kg for this kit)
JMACX heavy duty 300M chrome-moly full floating axle kit
JMACX full braided brake line kit
JMACX heavy duty adjustable rear sway bar and link kit
High pressure Airbag Man in-coil airbags
JMACX billet front sway bar blocks
JMACX VDJ brake booster upgrade (30% brake increase)
3 inch 70 Series front coils and 2–3 inch JMACX rear coils
JMACX Elite H-Beam CNC billet radius arms
Torqit 3.5 inch Troopy DPF-back exhaust
Speedo correction unit, GVM compliance and speedo stickers
JMACX SSM approval (Australian national approval)

Quote this package

Coil conversion – 4,200 kg GVM

Suits: 1GD · Best for: Full campervan and expedition fit-outs that need the extra front axle capacity.

What's included

3 Inch Troopy coil conversion kit (DPF)
Fully welded bolt-in structural cradle and side plates
JMACX heavy duty adjustable lower and upper control arms
JMACX heavy duty adjustable front and rear panhards
JMACX track-correction fabricated coil diff housing (3,000 kg rated, under-rated to 2,850 kg for this kit)
JMACX heavy duty 300M chrome-moly full floating axle kit
JMACX full braided brake line kit
JMACX heavy duty adjustable rear sway bar and link kit
High pressure Airbag Man in-coil airbags
JMACX billet front sway bar blocks
JMACX VDJ brake booster upgrade (30% brake increase)
3 inch 70 Series front coils and 2–3 inch JMACX rear coils
JMACX Elite H-Beam CNC billet radius arms
Torqit 3.5 inch Troopy DPF-back exhaust
Speedo correction unit, GVM compliance and speedo stickers
JMACX SSM approval (Australian national approval)

Quote this package

JMACX Alpha shock fitted at Project Overlander

Add JMACX Alpha 2.5 shocks

Alpha shocks are designed and tuned by JMACX for heavy GVM builds: a true 2.5 inch internal bore, adjustable damping and an optional in-cab electronic controller, so you can firm up for towing and soften for corrugations.

Ask about Alpha shocks

See JMACX builds

Project 78 – the ultimate two-person overlander

All GVM approvals in place for the 1GD

JMACX Alpha 2.5 electronic shocks – in-cab controller

Why Project Overlander

Trusted GVM facility

We fit Dobinsons, JMACX and Offroad Industries GVM upgrades in-house, so you get the kit that suits your vehicle – fitted by our own technicians.

Paperwork handled

Pre- or post-registration, we organise the compliance plate, certification and rego update.

Build it once

Combine your GVM with trays, canopies, drawers, long range tanks and 12V, planned around your new payload.

Comparing brands? See all options on our GVM upgrades page.

Get a quote – JMACX Troopy GVM

Tell us your vehicle and what you carry and tow. We will recommend the right package and send you a quote.