Mitsubishi Triton towing: the class-best 2,040 kg rear axle the combined limit won't let you use

The strongest rear axle in the class

Start with the number Mitsubishi is quietly proud of. The current Triton carries a 2,040 kg rear-axle limit, and that is the most of any mainstream 3,500 kg ute on sale here. A Ford Ranger rear axle is rated to 1,959 kg. The new HiLux sits around 1,700 kg. So on the one piece of hardware that actually carries a caravan's tow ball, the Triton has the most room in the room.

This matters because the rear axle is where a tow ball lands. Hitch a heavy van and the coupling load presses down behind the rear wheels, levering extra weight onto that axle while it lifts a little off the front. A higher rear-axle rating means more of that downward load before you run out of plate. On the number that counts for ball mass, the Triton starts ahead of the utes it is usually cross-shopped against.

Which is what makes the rest of this article a slightly frustrating story. Mitsubishi gave the Triton the best axle in the class and then capped what you are allowed to do with it.

The combined limit that lands 450 kg short

Here is the number that undercuts the axle. The Triton's Gross Combination Mass (GCM) — the most the ute and the loaded trailer are allowed to weigh together — is 6,250 kg. Its Gross Vehicle Mass (GVM) is 3,200 kg. Add a 3,500 kg trailer to a fully loaded ute and you reach 6,700 kg. That is 450 kg over the combined limit, before you have packed a single thing.

So the two headline figures, 3,200 kg of vehicle and 3,500 kg of trailer, cannot both be true at once. To tow the full 3,500 kg you have to keep the ute roughly 450 kg under its own GVM. To run the ute at full GVM, the van has to come down to about 3,050 kg. The strong rear axle never gets a say in this, because the combined-mass ceiling is reached first.

It is worth being plain about what this is and is not. A 450 kg shortfall is normal for a modern dual-cab — the Ford Ranger carries the same gap, the Everest V6 sits near 400 kg, the Toyota HiLux a smaller 320 kg, and the wider towing-capacity guides show the same pattern across the class. It is not a Triton defect. The point is that the Triton's class-best axle does not buy it more combined capacity than its rivals, because the binding number is the GCM, and the GCM is mid-pack.

Where the 350 kg ball goes after that

The tow-ball limit is 350 kg, and that figure does double duty as a payload problem. Whatever sits on the ball comes straight out of the ute's payload, the same payload you also need for people, a canopy, drawers, tools and water. A GLS weighs about 2,117 kg at the kerb, leaving roughly 1,083 kg of payload under the 3,200 kg GVM. Put 350 kg of that on the tow ball and you are down to about 735 kg for everything and everyone else — but only while the trailer stays light. Hook up the full 3,500 kg and the 6,250 kg GCM caps the ute's own loaded weight at 2,750 kg — and on this side of the sum the 350 kg ball is already counted inside the van's 3,500 kg ATM, so it only comes off once. After the 2,117 kg kerb, that leaves about 633 kg of usable payload on a GLS. The 735 kg figure is the GVM ceiling; the 633 kg figure is what the combined limit leaves you at the rated maximum — roughly 100 kg leaner again.

A GSR is heavier again at 2,170 kg kerb, so it starts with around 1,030 kg of payload and is left with roughly 680 kg once the ball is loaded. The leaner GLX, at 2,003 kg kerb, keeps the most back — close to 850 kg after the ball — which is one reason a work-spec Triton can carry more than a top-spec one. The badge that looks like the towing pick often leaves you the least to load.

Independent analysis backs the squeeze: autoexpert's John Cadogan put the Triton's usable payload at roughly 735 kg once the ball download is accounted for, and pointed heavy-tug buyers toward much heavier kerb-weight rigs for routine 3.2-3.5 tonne work. The rear axle has the room. The payload sheet is where the ambition gets trimmed.

Why the back end still sags with a strong axle

Here is the part that confuses owners. The axle is rated to 2,040 kg, so why does the Triton drop its tail under a heavy van? Because the axle rating and the spring tune are two different things. On the GLS and GSR, the rear sits on light-duty leaf springs, and a leaf spring's job is to control ride height, not just to survive a load. The plate can be happy while the spring still squats.

The reviewer evidence is consistent across three independent sources. A caravancampingsales tow test with a 3,100 kg van and 282 kg on the ball measured the front rising about 10 mm and the rear drooping around 30 mm — described as about the limit before you reach for a load-leveller. A long-term GSR sank rapidly under a loaded tray, with the nose pointing skyward and the steering going light enough that the reviewer felt bullied by the caravan. A long-term GLS reported a ride that was grounded and stable when laden but bouncy to the point of jarring when empty.

So the spring feel runs out before the axle number does. That gap — strong plate, soft spring — is exactly why Triton owners reach for a weight-distribution hitch or airbags long before the axle is anywhere near 2,040 kg. What restores composure is putting the sagged load back where it belongs, set from measured axle weights rather than from how level the ute looks parked.

Setting a weight-distribution hitch on a Triton

The job of a weight-distribution hitch on this ute is specific: take some of the load the rear springs are sagging under and hand it back, partly to the front axle and partly to the van's own axles. When the rear droops 30 mm and the nose lifts 10 mm, the front tyres carry less, the steering goes light and the headlights aim at the trees. Spring-bar tension pulls the rig back toward level and returns weight to the steer axle, where you want it for control.

What it does not do is lower any number that matters for compliance. The ball is still 350 kg. The combined mass is unchanged. A WDH redistributes load; it does not delete it. Wind the bars hard enough to pull a too-heavy nose back to level and you can over-tension the chassis and mask a loading problem rather than solve it. The honest test is a level rig with the front axle back to roughly its unhitched weight, confirmed on a weighbridge rather than judged by eye.

When the rig is right, the Triton tows tidily. A 2025 GSR Special Edition tow test ran a 2.7 tonne van that had been professionally balanced and reported no sway, pitch or porpoising at all — the back end stayed planted. That is the whole point of getting the setup right rather than relying on the axle plate to carry a poorly distributed load.

The transmission on a long climb

The 2.4L bi-turbo makes 150 kW and 470 Nm, which is enough torque for the job; the texture is in the 6-speed auto behind it. Two separate long-term tests found the same trait under load: the gearbox is too keen to hold a shorter gear on a climb and slow to settle, with a sticky three-to-four shift that owners learn to manage. On a long towing hill the consensus is to drop it into manual mode and pick the gear yourself rather than let the auto hunt.

It is a quirk, not a flaw, and it is firmly a towing observation rather than a solo one — unhitched, the auto is unremarkable. But it is the kind of thing worth knowing before you commit to a heavy van and a hilly route, because a transmission that hunts under load is more tiring over a long day than the raw outputs suggest. The engine has the grunt; the auto just needs a firm hand when the road goes up.

Two trims, two suspension stories

The rear-suspension behaviour splits by variant, and the split is worth understanding before you buy. The GLS and GSR run the light-duty leaf springs that sag under ball weight and ride well once laden but feel jarring empty. The cab-chassis and work-focused variants run heavier-duty springs that resist the sag but bounce more when the tray is light. Neither is wrong; they are tuned for different loads.

For a touring buyer who will spend most weekends with a van on the back, the sag-under-load behaviour of the GLS or GSR is the one to plan for — it is why a WDH and a careful tray are part of the kit, not optional extras. For a tradie running an empty tray most days and a trailer occasionally, the heavier springs trade the unladen bounce for less squat when something is on the ball. Match the spring to how you will actually load it, not to the trim walk.

What the Triton sensibly tows

Put the numbers together and a comfortable touring band falls out around 2,400-2,900 kg ATM. In that range a typical van puts roughly 240-290 kg on the ball, which leaves rear-axle and payload headroom for a canopy, a fridge, two adults and water without spending every kilogram. The combined mass stays clear of the 6,250 kg ceiling with margin to spare, and the light-duty springs, with a WDH set, keep their composure.

Push toward 3,000-3,200 kg ATM and the Triton can still do it, but every choice tightens. A 320 kg ball, a heavy alloy canopy and a drawer system can have the rear axle and the GCM both close before the family is aboard. This is the range where weights stop being admin and become part of the buying decision — measure the loaded ute, measure the van, and confirm the combination on a weighbridge before you sign for either.

Above 3,200 kg loaded, with a fully kitted ute and a normal holiday load, the honest answer is that the job has outgrown a Triton. The GSR Special Edition test that towed 2.7 tonnes happily still left only 584 kg of payload at the van's max, and the reviewers' standing advice is to match a van lighter than the rating rather than chase the headline. If your van is genuinely 3.4-3.5 tonnes loaded, a heavier-kerb tug is the better tool, and that is not a knock on the Triton.

A used-buyer note on older Tritons

If you are shopping used, the line in the sand is February 2024. Everything above describes the current 6th-generation Triton. The previous 5th-generation MR, sold up to 2023, towed 3,100 kg on a different chassis with a 2.4L single-turbo making 133 kW and 430 Nm, and it ran a lower combined limit. Do not carry any of the current numbers back to it.

The older generation also has its own due-diligence item: the intercooler-hose split that shows up in owner reports is a pre-2024 issue, not a current-gen pattern, so weight it when you inspect an MR but leave it out of the conversation on a 6th-gen car. On the current Triton, the live items to know are the disable-each-drive driver-monitoring system, which a 2024 software update scaled back but did not eliminate, and a head unit that some owners report glitching. None of those touch the towing maths; they are cabin character, dated to the 2026 reviews.

Reading the picture from measured weights, not the plate

Everything above turns on one soft spot: the light-duty leaf springs let the rear sag before the 2,040 kg axle plate is anywhere near full, so the way the Triton sits tells you almost nothing about where its real margins are. The plate says you have room. The springs say you are squatting. Only a measured weight settles which is true. Before you buy either the ute or the van, run the free Can I Tow It? check to see whether the pairing comes back pass (well matched), caution (careful) or fail (no), then weigh it to confirm.

Logging that weighbridge or mobile-weigh result into loadmate is what turns the estimate into something you can trust. Drive the loaded ute and van across the scales, enter the front-axle, rear-axle and combined figures, and the rig rebuilds from what it actually weighs rather than from the kerb-weight number the brochure printed. With a sagging GLS or GSR carrying a canopy, a long-range tank and a loaded ball, that measured baseline is the honest one — and it shows whether the 450 kg combined shortfall, the rear axle or the ball is the limit you are about to hit.