GVM upgrade

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Joined
Oct 9, 2019
Threads
4
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18
Location
Dubai
Hey guys,

I have a 2001 UZJ100 which I’m turning into an overlanding rig. Installed a long range fuel tank, 50 liter water tank, drawers, rooftop tent, awning and fridge so far. Got the car weighed up and I’m already at GVM weight. I’m still going to add on steel bumpers, carriers and winch. Have a Dobinsons 1.5 inch lift kit installed +400 kgs constant weight installed. I don’t know if that actually increases the GVM or not. Is there any company selling a GVM upgrade kit? Can I survive without it? Worried the axel won’t take all that load
 
Hey guys,

I have a 2001 UZJ100 which I’m turning into an overlanding rig. Installed a long range fuel tank, 50 liter water tank, drawers, rooftop tent, awning and fridge so far. Got the car weighed up and I’m already at GVM weight. I’m still going to add on steel bumpers, carriers and winch. Have a Dobinsons 1.5 inch lift kit installed +400 kgs constant weight installed. I don’t know if that actually increases the GVM or not. Is there any company selling a GVM upgrade kit? Can I survive without it? Worried the axel won’t take all that load
It'll be fine
 
Hey guys,

I have a 2001 UZJ100 which I’m turning into an overlanding rig. Installed a long range fuel tank, 50 liter water tank, drawers, rooftop tent, awning and fridge so far. Got the car weighed up and I’m already at GVM weight. I’m still going to add on steel bumpers, carriers and winch. Have a Dobinsons 1.5 inch lift kit installed +400 kgs constant weight installed. I don’t know if that actually increases the GVM or not. Is there any company selling a GVM upgrade kit? Can I survive without it? Worried the axel won’t take all that load

Where did you source your tanks? I’ve been looking into adding extra fuel and water storage myself.
 
Where did you source your tanks? I’ve been looking into adding extra fuel and water storage myself.
I got the fuel tank from Long Range Automotive in Australia. I believe Long Range America sells the same product.

Got the water tank from Front Runner which sits behind the rear seats in the cargo area
 
That suspension kit will certainly allow for a higher and safer GVM but if you need something on paper that says so, then that's different.
 
Hey guys,

I have a 2001 UZJ100 which I’m turning into an overlanding rig. Installed a long range fuel tank, 50 liter water tank, drawers, rooftop tent, awning and fridge so far. Got the car weighed up and I’m already at GVM weight. I’m still going to add on steel bumpers, carriers and winch. Have a Dobinsons 1.5 inch lift kit installed +400 kgs constant weight installed. I don’t know if that actually increases the GVM or not. Is there any company selling a GVM upgrade kit? Can I survive without it? Worried the axel won’t take all that load

You may have more latitude in UAE. Other parts of the world also may be different.

Might be worth a discussion with a good 4WD workshop in UAE to see what is possible under local 'rules' with no chance of an unwelcome surprise later in a ‘worst case’ scenario?

It is tough in Australian States and Territories. This how it works here, although there are some differences between Australian States on the finer details.

Before getting to that, it is worth looking at the box depicted below. It comes from Page 214 of the Australian “Toyota Landcruiser Station Wagon Owner’s Manual – 2006”, provided by Toyota Motor Corporation of Japan.

Maybe the axle load details in the box were much the same in 2001. Your Owner’s Manual may have something similar somewhere.

LC100 Axle Loads.jpg

In the States and Territories of Australia, if an LC100 (or LX470) is to exceed the Manufacturer's Gross Vehicle Mass (GVM) specified on the plate fixed to the engine compartment firewall (3,260kg or 7,187 pounds for LC100 with IFS), then certification by an independent licensed automotive engineer must first be obtained to support a “GVM upgrade”. This documentation must cover Government-imposed inspection, assessment and testing requirements and must be approved and accepted by the relevant State Government authority for the purposes of vehicle registration.

The GVM is the maximum allowable mass when on the road of the vehicle plus everything carried on it or in it, including driver and passengers, and including towball weight of anything towed.

The documentation must support the suspension and other modifications as approved by the independent engineer (not the Owner) as deemed necessary for the new GVM. When approved, a new compliance plate must be fitted which specifies the new GVM. The new GVM also must be shown on the vehicle registration papers.

This may have limited practical application to LX470's and LC100's with AHC unless the AHC suspension is removed first. The AHC suspension is almost impossible to 'upgrade' in a way which meets Australian regulatory requirements for a "GVM Upgrade".

For a non-AHC suspension on a LC100, would an engineer assessing a GVM Upgrade go beyond beyond the sum of the axle limits as specified by the Manufacturer in a public document like the extract from the Owner’s Manual given above?

1,630 + 1,950 = 3,580 kg (7,893 pounds) for an LC100 with IFS and 2UZ-FE or 1HD-FTE

Don’t know but it seems unlikely.

In this part of the world, any vehicle loaded beyond its approved GVM would be deemed unroadworthy with all sorts of consequences and personal liabilities if detected by Police during an on-road inspection or after an accident. It is likely that an insurer would resist any claim following an accident by the Owner or Driver of a vehicle loaded beyond its approved GVM. This would open personal financial exposure to law suits by third parties against the Owner and Driver for damages and injuries.

Maybe things are different in other parts of the world.
 
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You may have more latitude in UAE. Other parts of the world also may be different.

Might be worth a discussion with a good 4WD workshop in UAE to see what is possible under local 'rules' with no chance of an unwelcome surprise later in a ‘worst case’ scenario?

It is tough in Australian States and Territories. This how it works here, although there are some differences between Australian States on the finer details.

Before getting to that, it is worth looking at the box depicted below. It comes from Page 214 of the Australian “Toyota Landcruiser Station Wagon Owner’s Manual – 2006”, provided by Toyota Motor Corporation of Japan.

Maybe the axle load details in the box were much the same in 2001. Your Owner’s Manual may have something similar somewhere.

View attachment 2379908
In the States and Territories of Australia, if an LC100 (or LX470) is to exceed the Manufacturer's Gross Vehicle Mass (GVM) specified on the plate fixed to the engine compartment firewall (3,260kg or 7,187 pounds for LC100 with IFS), then certification by an independent licensed automotive engineer must first be obtained to support a “GVM upgrade”. This documentation must cover Government-imposed inspection, assessment and testing requirements and must be approved and accepted by the relevant State Government authority for the purposes of vehicle registration.

The GVM is the maximum allowable mass when on the road of the vehicle plus everything carried on it or in it, including driver and passengers, and including towball weight of anything towed.

The documentation must support the suspension and other modifications as approved by the independent engineer (not the Owner) as deemed necessary for the new GVM. When approved, a new compliance plate must be fitted which specifies the new GVM. The new GVM also must be shown on the vehicle registration papers.

This may have limited practical application to LX470's and LC100's with AHC unless the AHC suspension is removed first. The AHC suspension is almost impossible to 'upgrade' in a way which meets Australian regulatory requirements for a "GVM Upgrade".

For a non-AHC suspension on a LC100, would an engineer assessing a GVM Upgrade go beyond beyond the sum of the axle limits as specified by the Manufacturer in a public document like the extract from the Owner’s Manual given above?

1,630 + 1,950 = 3,580 kg (7,893 pounds) for an LC100 with IFS and 2UZ-FE or 1HD-FTE

Don’t know but it seems unlikely.

In this part of the world, any vehicle loaded beyond its approved GVM would be deemed unroadworthy with all sorts of consequences and personal liabilities if detected by Police during an on-road inspection or after an accident. It is likely that an insurer would resist any claim following an accident by the Owner or Driver of a vehicle loaded beyond its approved GVM. This would open personal financial exposure to law suits by third parties against the Owner and Driver for damages and injuries.

Maybe things are different in other parts of the world.

Thanks for all the info!

The tag by the driver door shows the same figures you’ve mentioned in the manual, so they definitely are the same.

Probably things aren’t as strict here you’re right. Eventually I might be taking the car to Europe so would be good to have things legalized as much as possible I guess.
But this wasn’t really my concern, I was mainly worried about breaking the car down for having more weight than it can handle. Like reinforcing weak points, finding replacements..etc
All I’ve found here so far is just suspension upgrades. I’m no pro but I guessing there’s more to it than just that. Probably breaks and stuff need to be upgraded as well.

I found ARB OME 2868 coils which take you up +600 kgs but they don’t recommend using it on a 100, it’s meant to be used on a 105.
haven’t been able to find any GVM upgrade kits online. Only for 200 series, 70s..etc
Considering getting those ARB coils or there’s airbag man suspensions from Australia that I’m looking into as well
 
Thanks for all the info!

The tag by the driver door shows the same figures you’ve mentioned in the manual, so they definitely are the same.

Probably things aren’t as strict here you’re right. Eventually I might be taking the car to Europe so would be good to have things legalized as much as possible I guess.
But this wasn’t really my concern, I was mainly worried about breaking the car down for having more weight than it can handle. Like reinforcing weak points, finding replacements..etc
All I’ve found here so far is just suspension upgrades. I’m no pro but I guessing there’s more to it than just that. Probably breaks and stuff need to be upgraded as well.

I found ARB OME 2868 coils which take you up +600 kgs but they don’t recommend using it on a 100, it’s meant to be used on a 105.
haven’t been able to find any GVM upgrade kits online. Only for 200 series, 70s..etc
Considering getting those ARB coils or there’s airbag man suspensions from Australia that I’m looking into as well

The ‘rules’ in various Australian States/Territories seem to become more strict almost on an annual basis with ever more strict policing, all amidst much controversy and outcry from the 4WD fraternity! And on the “100 series” (and the “105 series”) it is very hard to carry extensive add-ons (front bar, rear bars, winch, sliders, roofrack full of gear, long range fuel and water tanks, additional wheel(s), tools, spares, recovery gear, etc, etc plus people and their possessions and rations) and stay within Original Manufacturer’s GVM. Some have managed to upgrade the GVM of their “100’s” and “105’s” by around 10% with new certification. There are some who don’t re-certify, run significant risks and keep well clear of any weighbridges! (Personally, I avoid the bathroom scales in the same way, so I cannot be critical!!) By the way, new certification here involves sign-off of the whole vehicle dynamics – mass, suspension, tyres, wheels, structure, swerve stability, brakes, suspension, axle loadings, lift, etc, etc, etc – it is not just about mass and suspension. However, the regulatory situation here is of no use to you.

As you mentioned in both your posts, you want somebody who can can do more than sell you springs and shocks with a ‘lift’. It might be worthwhile to talk your project through by phone with good suppliers who have a broad technical knowledge base and a good reputation – Lovells, Pedders, Dobinson, ARB, Airbagman (for air springs, not just helper bags inside coil springs) all come to mind in Australia and all have a good understanding of the “100’s” and “105’s”. Some of them have outlets in Dubai, but I have no idea whether their people there are particularly knowledgeable on technical aspects. There will be other good outfits in the US and maybe EU as well. The point is you might do better with informal discussion over the phone to Australia or US than on the record by e-mail – at least as a starting point.

As well as insights from the good people at IH8MUD, you might find some further insights on technical matters relevant to your upgrade project by doing some Searches at the Australian Landcruiser site -- LCOOL.org :: Index . This requires registration but it is free.

Best wishes with the project. :steer:
 
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