GVM Upgrades — Pre & Post Rego, Engineer Certified | Sunshine Coast

TECHNICAL BUYER'S GUIDE & COMPARISON ✓ AUTHENTIC SUPPLIER SPECIFICATIONS

Twin Tube vs IMS vs MRR Shock Absorbers

Dobinsons Suspension Sunshine Coast

Dobinsons Twin Tube shocks suit dependable everyday, touring and load-carrying upgrades; IMS monotube shocks add greater oil capacity and heat control for demanding corrugations and heavy work; MRR remote-reservoir shocks add three-way damping adjustment for drivers who want high-performance tuning.

The Ute Shop can match Dobinsons springs and shock absorbers to your vehicle, accessories, payload, towing use and terrain, then complete professional installation at our Warana workshop on the Sunshine Coast.

Find Dobinsons Suspension for My 4WD

Which Dobinsons Shock Absorber Should I Choose?

RANGE DESIGN BEST SUITED TO MAIN DIFFERENCE
Twin Tube Nitro Gas Twin-tube big-bore, vehicle and weight-specific valving Daily driving, touring, towing and general 4WD upgrades Straightforward fixed-valving upgrade with larger bodies and increased oil capacity
IMS Internal floating piston monotube with 50 or 60 mm piston depending on application Corrugations, long trips, towing, heavy work and sustained demanding use Improved heat transfer and fade resistance with high-flow monotube construction
MRR Monotube remote reservoir with three-way damping adjustment Serious off-road use, changing loads and drivers wanting detailed tuning Separate high-speed compression, low-speed compression and rebound adjustment

Dobinsons Twin Tube Nitro Gas

Dobinsons Twin Tube Nitro Gas shock absorber range

Dobinsons Twin Tube Nitro Gas shock absorber range for daily driving and touring

Dobinsons Twin Tube Nitro Gas shock absorbers deliver proven, robust damping control for daily driving, weekend off-roading, and touring. Featuring big-bore internal pistons, twin-wall stone damage protection, and multi-lip NOK seals, they provide long-lasting reliability without complex external valving.

  • Twin-tube design protects internal working cylinder from flying stones and debris
  • Low-pressure nitrogen gas eliminates oil aeration and cavitation
  • Heavy-duty rubber bushings for noise reduction and chassis flex compliance
  • Tailored spring rates matched to constant front and rear accessory weights

Dobinsons IMS Monotube (Internal Monotube Shock)

Dobinsons IMS monotube shock absorber range

Dobinsons IMS monotube shock absorber range with 50 mm / 60 mm bore

Dobinsons IMS monotube shock absorbers feature an internal floating piston (IFP) separating high-pressure nitrogen gas from the shock oil. The 50mm or 60mm bore provides superior heat dissipation over corrugations, preventing shock fade and providing firm, precise chassis control for heavily laden touring rigs.

  • Large single-tube body sheds heat significantly faster than twin-tube dampers
  • Heavy-duty micro-polished chrome piston rod resists stone pitting
  • Threaded body allows precise front ride-height adjustment on strut applications
  • Fully rebuildable and re-valvable design for sustained demanding use

Dobinsons MRR Remote Reservoir (3-Way Adjustable)

Dobinsons MRR three-way adjustable remote-reservoir range

Dobinsons MRR 3-way adjustable remote-reservoir shock absorbers with high/low speed compression and rebound tuning

The MRR (Monotube Remote Reservoir) range represents Dobinsons' flagship off-road competition and severe touring suspension. By relocating the gas and secondary oil volume into an external aluminium reservoir, heat dissipation is maximized. Independent dials allow high-speed compression, low-speed compression, and rebound damping to be adjusted separately.

  • Independent high-speed compression tuning for aggressive bumps and washouts
  • Low-speed compression tuning to control body roll, brake dive, and swaying
  • Rebound adjustment to prevent rapid extension after suspension compression
  • Braided high-pressure lines and 6061 aluminium lightweight reservoir canisters
Spring Load Matching

Shocks control movement, but springs carry the weight. When selecting Dobinsons suspension, our technicians account for your bull bar, winch, dual battery, canopy, drawers, and towing weights to ensure the correct spring rate is installed.

Dobinsons GVM Upgrades & Workshop Installation

For trade fleets and touring vehicles requiring certified payload capacity, Dobinsons GVM Upgrade packages are available for popular dual-cab utes and 4WD wagons. Installed and certified at our Warana facility (4/43 Premier Circuit) with comprehensive wheel alignment.

Visit our Warana showroom & workshop 4/43 Premier Circuit, Warana QLD 4575  |  Phone 07 5438 8204

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Frequently asked questions

What is the difference between Dobinsons IMS and Twin Tube?

Twin Tube shocks feature a dual-wall design that protects against stone damage, ideal for everyday driving and touring. IMS shocks are high-pressure monotubes with larger oil volume and an internal floating piston, delivering much higher fade resistance on severe corrugations.

Are Dobinsons MRR shocks adjustable?

Yes, Dobinsons MRR shocks provide 3-way external damping adjustment: high-speed compression, low-speed compression, and rebound damping.

Does Dobinsons suspension include a lift?

Yes, Dobinsons suspension systems typically provide a 40mm to 50mm (approx. 2-inch) lift depending on the vehicle model and selected spring rates.

Does a Dobinsons lift kit increase legal GVM?

A standard lift kit does not increase legal GVM. However, Dobinsons offers certified GVM Upgrade kits with secondary manufacturing compliance for selected vehicle models.

Can The Ute Shop fit Dobinsons suspension on the Sunshine Coast?

Yes. The Ute Shop supplies and professionally installs Dobinsons Twin Tube, IMS, MRR, and GVM systems at our Warana workshop.

Find Dobinsons Suspension for My 4WD

Tell us the make, model, year and variant and what you want fitted, and we will come back with the right options and a price for the parts and the fitting.

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Workshop Buyer's Guide & Technical Fitment Advice
ADR Compliant

A GVM upgrade raises the Gross Vehicle Mass your ute is legally allowed to weigh when it is loaded - the number on the compliance plate, not a suspension setting. It matters because a modern dual cab leaves the dealership with far less usable payload than most owners assume. Fit a steel bull bar, a winch, a canopy, a dual battery system, a set of drawers and a full long range tank, then add four adults and a week of gear, and a 3,200kg-rated ute can be over its plated limit before it leaves the driveway. Overloaded is not a technicality: it voids insurance, it fails a roadside inspection, and it changes how the vehicle brakes and steers on the Bruce Highway with a van behind it.

What actually changes

A certified upgrade replaces the springs, shock absorbers and, depending on the kit, the leaf packs, bump stops, U-bolts and brake components with heavier-rated equivalents, then re-plates the vehicle at the new mass. The paperwork is the part that makes it legal. You receive a compliance or modification plate and the certification documents that go with it, which is what your insurer and a transport inspector will ask for. Heavier springs on their own are not a GVM upgrade, no matter how much extra load they carry - a distinction that catches a lot of people out.

Pre-registration and post-registration - we do both

There are two routes and they are not interchangeable. A pre-registration upgrade is fitted before the vehicle is first registered and is complied by the supplier under second stage manufacture, so it arrives with federal approval already attached and is generally the cleaner path if you are buying new. A post-registration upgrade is fitted to a vehicle already on the road and is certified by a licensed engineer under Queensland's modification code. The Ute Shop handles both. Which one applies comes down to where your vehicle is in its life, so it is worth a conversation before you order - and if the limit you keep hitting is the combined vehicle-and-trailer figure, a GCM upgrade is a different job again.

Brands and kit options

We are an authorised dealer for the suspension brands we carry, which is what keeps the manufacturer's warranty intact on a fitted kit. The GVM range here is built around Lovells, with Outback Armour, Tough Dog, Dobinsons, EFS 4x4 and ORI covering the lift kits, shock absorbers and spring packs that sit underneath. The differences between them are real and worth understanding: some kits are tuned for constant heavy load and ride firm when the tray is empty, others are progressive and stay comfortable unladen but give up a little control at full weight, and remote-reservoir shocks earn their keep on corrugated dirt but are more than most tradies driving to sites around Kawana will ever use. Load levelling airbag suspension is a different tool again - it manages a variable load, it does not raise your legal limit.

Vehicles we upgrade

Kits are available for the Ford Ranger and Raptor, Toyota HiLux, Isuzu D-MAX, Toyota LandCruiser 79, 200 and 300 Series, Mitsubishi Triton, Mazda BT-50, Volkswagen Amarok, Nissan Navara and Ford Everest, plus the American trucks we specialise in - RAM 1500, RAM 2500 and 3500, and the Chevrolet Silverado. Availability varies by model and build year, because each kit has to be certified for that specific vehicle rather than adapted from a similar one.

Supplied and fitted at Warana

Everything we sell can be supplied and fitted in our own workshop at 4/43 Premier Circuit, Warana, on the Sunshine Coast - one workshop, our own fitters, not a franchise network. We do the measure-up, the fitting, the wheel alignment afterwards and the certification paperwork, and we will tell you honestly if the load you are describing does not need an upgrade at all. Customers come to us from Kawana, Caloundra, Maroochydore, Mooloolaba, Buderim, Nambour, Noosa, Gympie and Caboolture, and we deliver Australia-wide for owners fitting their own. Tell us what you tow, what you carry and what you have already bolted on, and we will quote the whole job.

Common questions

Will a GVM upgrade let me tow more?

Not on its own. GVM is what the loaded vehicle may weigh; the combined vehicle-and-trailer figure is the GCM, and towing capacity is separate again. Some kits raise GVM only, some raise both. If the limit you keep running into is with the van hooked up, tell us that up front - it changes which kit is the right answer.

Can it be done after the vehicle is registered?

Yes. A post-registration upgrade is certified by a licensed engineer rather than by the supplier, and it is a completely legitimate route. Pre-registration upgrades are complied by the supplier before first registration. We do both.

Will it ruin the ride when the ute is empty?

It can if the kit is chosen badly - the most common complaint about GVM upgrades. A constant-load kit on a ute that spends five days a week empty feels harsh. Tell us how the vehicle is actually used and we will match the spring rate to that.

Does the upgrade affect my new vehicle warranty?

We are an authorised dealer for every brand we fit, so the components carry their own manufacturer warranty, and we supply the full certification pack with every upgrade.

Why buy and fit with The Ute Shop

  • Authorised dealer: We are an authorised dealer and distributor for every brand we carry, so your warranty is supported through the manufacturer.
  • ADR compliant: All products we supply are compliant with the Australian Design Rules.
  • GVM upgrades, pre and post rego: We do both. Pre-registration upgrades are complied by the supplier; post-registration upgrades are complied by a certifying engineer.
  • Fitted in-house at Warana: One workshop, not a franchise network: 4/43 Premier Circuit, Warana. We serve Kawana, Caloundra, Maroochydore, Mooloolaba, Buderim, Nambour, Noosa, Gympie and Caboolture, with nationwide delivery.
  • 14 years, locally owned: Locally owned and operated on the Sunshine Coast for 14 years.
Need professional advice or certified workshop installation on the Sunshine Coast?

Our trade specialists ensure correct dual cab payload rating, ADR compliance, and flawless fitment at our Warana workshop.

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