For people assuming they have a GCM upgrade

Hoyks

Well-Known Member
A bit of a beat up.
Its been the rules around here for a while, while you can do a GVM upgrade of 10%, there has always been an upper limit to the GCM, so any extra capacity that is allowed in the tow vehicle has to come off the trailer.
(from 2017)
LS11 – Gross Vehicle Mass Rating of Light Vehicles
The LS11 is designed to allow a light vehicle’s Gross Vehicle Mass (GVM) to be increased and
certified under the Approved Person scheme. It will replace the existing procedures of applying to
TMR for individual approval for manufacturer’s GVM options, or for Second Stage Manufacture
(SSM) holders to apply for a new type approval each time they obtain a new SSM.
The LS11 modification code will allow Approved Person engineers to certify the following
modifications under a modification code:
- Increase a vehicle’s GVM where an additional axle has been fitted;
- Increase in a vehicle’s GVM to a manufacturer’s optional GVM
- Increase in a vehicle’s GVM up to 10% where a physical modification (springs, shock
absorbers, and so on) has been performed
- Increase in a vehicle’s GVM in accordance with a SSM, approval where permission from
the SSM holder has been provided in writing.

Modifications which will not be acceptable under the new GVM modification code include:
- GVM increase to a vehicle with unitary/monocoque construction.
- Reduction in GVM rating (unless in accordance with a manufacturer’s option).
- Increase in Gross Combination Mass (GCM) rating or, if no GCM is specified, the maximum
towing mass at GVM, except in accordance with an SSM approval or manufacture’s option.

- Increase in vehicle’s towing capacity, except in accordance with an SSM approval or
manufacture’s option.

If you really need more than 4.5 tonne, maybe you've bought the wrong vehicle and a light truck and associated licence would be a better bet?
 

cam04

Well-Known Member
Mobs like Lovell’s were offering GCM increases for a while in QLD actually. People have paid a lot of money only to be shortened up again. Yes, people have weird expectations of cars but that is aside from the point that they have paid big money for upgrades that are illegal.
 

dirvine

Well-Known Member
My thought has always been if you need to up the GVM, if you need air bags, new springs, WDH, new shock etc just to tow a certain type of van, then you have the wrong tug for the job, period.
 

discomatt

Well-Known Member
An V8 or old 6 to tow 3.5 ton???? You are kidding right?
to tow 3.5 ton any decent distance you need a diesel and preferably a new one with 200 killer wasps and 600+ NM or its going to be a slow painful process that will see overheating and insane fuel consumption at the slightest hill or head wind.
IMO if towing that much you need a small truck or yank ute, no common 4wd on the Aussie market is really suited to that weight as far as I am concerned but many will disagree no doubt
 

linuxfan66

Active Member
Its more than just a V8. Commodore cannot tow 3.5T.
people used to tow beefy caravans with sedan/station wagons back in the day. they could make them tow more weight but the era of towing focused sedans/station wagons is long over...
 
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dirvine

Well-Known Member
people used to two beefy caravans with sedan/station wagons back in the day. they could make them two more weight but the era of towing focused sedans/station wagons is long over...
probably because vans have got heavier and bigger and cars have got lighter for fuel efficiency reasons. As a result the tail would wag the dog, Which in many (most) aspects is still the case with so called 3.5t towing capable vehicles nowadays.
 
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