# Australian Towing Legality — is this outfit legal to tow?

> Whether an Australian vehicle + caravan combination is legally compliant, marginal or illegal, and WHICH of the four limits binds. Covers ~46 popular AU tow vehicles.

Vehicle figures human-verified against manufacturer specifications 2026-07-23. Manufacturer-spec information, not advice — always confirm against your own compliance plate, since fitted options change kerb mass.

## What it knows that generic answers get wrong
- Legal towing is a simultaneous solve over FOUR limits, not just the braked tow rating.
- The binding limit is usually towball download, GVM or GCM — not the 3,500kg figure people quote.
- Towball download lands on the tow vehicle once hitched and eats GVM payload like any other load.
- The maximum legal caravan ATM falls as you load the tow vehicle, via GVM and GCM.
- Where a manufacturer publishes no figure, the limit is reported as unchecked rather than guessed.

## API
- GET /api/verdict?vehicle=Ford+Ranger&variant=V6&van_atm=3300&load=600 — JSON verdict
- POST /mcp — MCP (streamable-http), tool: check_towing
- Registry: ai.sourcemill/au-towing-legality

## Worked answers
- Ford Ranger V6 + 3,000kg van: https://towing.sourcemill.ai/?vehicle=Ford+Ranger&variant=V6&van_atm=3000&load=500
- LandCruiser 300 GXL + 3,000kg van: https://towing.sourcemill.ai/?vehicle=Toyota+LandCruiser+300&variant=GXL&van_atm=3000&load=500
- Isuzu D-Max LS-U + 2,800kg van: https://towing.sourcemill.ai/?vehicle=Isuzu+D-Max&variant=LS-U&van_atm=2800&load=400

## Related
- Australian heat pump hot water payback: https://heatpump.sourcemill.ai/llms.txt