Toyota LandCruiser 78 Series GVM Upgrade
Get up to an extra 600KG payload – Upgrade your GVM to 3900KG
The Toyota LandCruiser 78 Series is designed for heavy-duty work and long-distance touring, but the factory payload is often exceeded once accessories, tools, and passengers are added.
Remaining within the Gross Vehicle Mass (GVM) can be difficult when the vehicle is fully loaded for remote travel or trade use.
Tough Dog Suspension, as a recognised Second Stage Manufacturer (SSM), develops federally certified GVM upgrade kits for the 78 Series. These upgrades let you legally carry more weight while maintaining compliance and safety.
Each kit is extensively tested to ensure full ADR compliance.
Federal approval for GVM upgrades requires comprehensive testing to confirm that the LandCruiser 78 Series maintains or improves performance under increased load.
With a Tough Dog GVM upgrade, your 78 Series will continue to brake, handle, and steer confidently even when fully loaded. Testing includes:
- Finite Element Analysis (FEA) testing: Confirms axle capacity and load strength.
- Brake Testing: Conducted laden, unladen, and under partial failure in compliance with ADR35/00.
- ESC Testing: If required, ensures the stability control system remains equal to or better than the OEM system.
The GVM is the maximum legal weight a vehicle can carry when fully loaded. A Tough Dog GVM upgrade increases your LandCruiser 78 Series’ payload capacity while staying compliant with ADRs and safety regulations.
Approval depends on registration status:
- Federal Approval: For new, unregistered vehicles. Supplied with an additional compliance plate.
- State Approval: For registered vehicles, approval is achieved using Federal compliance data with an inspection by an authorised state engineer.
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