Types of heavy vehicle transmissions

If you pass a practical competency assessment for a class HR, HC or MC licence, you will get a condition added to your driver licence.

This depends on the transmission type of the vehicle you used in the assessment. A condition on your licence restricts the type of heavy vehicle you can drive.

If you apply for a class LR or MR licence, you won't get any condition added to your licence.

Types of transmissions

A condition on a driver licence states what type of transmission you're allowed to drive.

Automatic

Heavy vehicles with an automatic transmission work in the same way as an automatic car. Gear changes happen automatically.

If you pass your assessment in a vehicle with an automatic transmission, your licence will have an XU condition applied.

Synchromesh

A vehicle with a synchromesh transmission has synchro rings that match the road speed and engine revs to make it easier to choose a higher or lower gear.

If you pass your assessment in a vehicle with a synchromesh transmission, your licence will have a B condition applied.

Constant mesh

With a constant mesh (or crash box) transmission, you must manually match the road speed and engine revs to allow the gears to be changed. This is typically done by double declutching.

If you pass your assessment in a vehicle with a constant mesh transmission, you will be issued a licence without a condition code.

Upgrade or remove a condition

You can have a condition removed from your licence if you retake your assessment in a vehicle fitted with another transmission type.

Upgrade class HR licence to class HC

To upgrade a class HR licence to class HC with differing conditions, read the below table.

Contact

Read more about driver licence conditions.

To find out more, email mvr@nt.gov.au.


Last updated: 02 September 2021

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