Leaf Spring Kits with Fitting Position Front and Rear, Front Axle, Rear Axle for TOYOTA HILUX GUN126R GR SPORT (N80) 4WD

A leaf spring kit for the GUN126R GR SPORT (N80) 4WD HILUX puts the springs and the hardware that goes with them in one box, which matters more here than on most suspension jobs.

Several of the fasteners in a leaf spring assembly are single use, so a springs-only purchase leaves you ordering parts halfway through the job.

What a Formula 4x4 GUN126R GR SPORT (N80) 4WD HILUX Leaf Spring Kit Includes

Each kit is built around one axle on one vehicle, and the contents follow what that application needs.

The springs are the core, supplied as a pair and rated to a specific constant load band between 50kg and 800kg with lift heights from 20mm to 80mm.

U-bolts come with every kit, in the correct length for the pack supplied. That matters because a taller spring pack needs longer U-bolts than the originals, and the original length will not leave enough thread for the nuts.

Bushes are included, covering the spring eye and usually the shackle as well.

Shackles and pins are supplied where the application calls for them, with greasable versions on kits where that suits the vehicle.

Check the listed contents against your GUN126R GR SPORT (N80) 4WD HILUX, since what one platform needs another does not.

Why Buy Your GUN126R GR SPORT (N80) 4WD HILUX Leaf Spring Kit Rather Than Springs Alone

Two of the components in the assembly cannot be reused, which decides it for most vehicles.

U-bolts are torqued into their yield range by design and stretch permanently as they are tightened. Undo one and that stretch stays, so retightening produces a fastener that feels tight while clamping well below what it did new.

Fixed pins have been clamped under high load and corroding for the life of the pack. They cost very little and they are what locates the spring on the axle seat, so reusing one is not a sensible saving.

Bushes are the third item in that category. They wear on the same timeline as the springs and the access is already paid for, so changing them separately later means doing the job twice.

Where a vehicle has had its hardware renewed recently and only the pack has given up, single springs make sense. On anything that has been on the road a while, the kit is the better value.

Load Ratings and Choosing the Right GUN126R GR SPORT (N80) 4WD HILUX Kit

The constant load rating decides whether the kit performs, and it matters more than the lift figure.

Constant load means the weight permanently on the vehicle, not the weight of the vehicle itself. A canopy, drawers, water tank, fridge, second battery and recovery gear move a bakkie up through the bands faster than most owners expect.

A kit rated below what you carry flattens under load and sits lower than standard. One rated well above it rides harshly and sits tail high with an empty tray.

Front and rear are specified separately on vehicles with leaf springs at both ends, since the front carries accessory weight while the rear carries payload.

Weigh the vehicle fitted out if you can, because estimates run low almost every time.

GUN126R GR SPORT (N80) 4WD HILUX Front and Rear Leaf Spring Kits

The two ends are different purchases and they are rated around different things.

Rear kits carry payload and ball weight, which is why the rear bands run higher. A tray load plus a caravan on the hitch adds up quickly, and ball weight sits behind the axle where it levers the front of the vehicle up.

Front kits on solid axle vehicles carry accessory weight instead. A steel bull bar, winch and dual battery is the usual combination, and the bands are lower to suit.

Lift heights are often specified differently front to rear as well, since matching the two is what keeps the vehicle sitting level rather than nose down or tail high.

Order both ends together where both are due, so the heights are chosen as a pair rather than one at a time.

GUN126R GR SPORT (N80) 4WD HILUX Leaf Spring Kits for Towing

Towing changes what the rear of a vehicle is asked to do, and it is worth choosing a kit around it rather than discovering the gap later.

Ball weight sits behind the rear axle and levers the front of the vehicle up. That takes weight off the steering, changes how the vehicle brakes, and points the headlights higher than they should be.

A kit rated for the ball weight plus whatever is in the tray keeps the vehicle sitting level once hitched, which is what keeps the steering feeling normal and the lights on the road.

Towing on an underrated pack is also the quickest way to flatten it, since the spring spends its working life near the limit of its range rather than in the middle of it.

Work out the ball weight rather than estimating from the trailer's total, because they are different numbers and the one that matters is what actually sits on the hitch.

Spring Steel and Build Features

Formula 4x4 leaf springs are made from high grade carbon spring steel in the SUP9 and SUP9A grades, which is the material class suited to sustained cyclic loading.

Lower grade steel can be made to hit the right rate when new and fatigues sooner, which is how a vehicle ends up quietly sagging with nothing visibly broken.

Tapered leaf ends thin the end of each leaf so the transition between leaves is gradual rather than a step, spreading the contact load and reducing the stiction that makes a pack feel harsh over small inputs.

Inter-leaf graphite coating cuts the friction between the leaf surfaces directly, which means a smoother initial response, less noise and less of the wear that eats into the leaf faces over time.

Torquing Your GUN126R GR SPORT (N80) 4WD HILUX Leaf Spring Kit and Retorquing After

Leaf spring work means heavy components with the vehicle supported, and a pack under its own arc moves as soon as the fasteners come off.

Fit the supplied U-bolts rather than the originals, and torque them evenly in a cross pattern rather than one leg at a time so the pack clamps square.

Make sure the fixed pin head seats fully into the locating hole in the axle seat before the U-bolts are tightened, because that head is what holds the pack in position.

Torque bushed joints with the vehicle on its wheels at ride height rather than hanging, since a bush takes a set from the position it is clamped in.

Retorque the U-bolts after the first few hundred kilometres once the pack has bedded in. The clamping load drops as it settles and that second torque is not optional.

Have a wheel alignment done afterwards, since the ride height change moves the geometry immediately.

What to Inspect While the GUN126R GR SPORT (N80) 4WD HILUX Leaf Spring Pack Is Off

A few things are worth inspecting while the access is there, since going back in later costs the same labour again.

Check the hangers and shackle plates for elongated bolt holes. Once a hole has gone oval the bracket moves before the fastener stops it, and retorquing achieves nothing.

Look at the mounting faces on the chassis rail for corrosion. A sound bracket bolted to a thinned rail is not a repair.

Inspect the shock absorbers while you are under there. They wear on a similar timeline, the access is shared, and new springs working through tired dampers will not give the result the kit was bought for.

Check the axle seat where the fixed pin head locates, since corrosion there affects how well the pack seats.

GUN126R GR SPORT (N80) 4WD HILUX Leaf Spring Kit Lift Height and Compliance

Any kit that raises the vehicle brings compliance into it, and the rules vary depending on where the vehicle is registered.

Suspension modifications must meet the requirements that apply where the vehicle is registered, so the legal lift height depends on the vehicle and those requirements.

What is measured is total lift rather than the suspension lift alone, and larger tyres contribute roughly half their increase in overall diameter.

Lower lift kits generally sit at the simpler end of those requirements, which is part of why they are the most commonly fitted.

Check the current requirements where your vehicle is registered before choosing a height.

Formula 4x4 GUN126R GR SPORT (N80) 4WD HILUX Leaf Spring Kit Warranty

Formula 4x4 leaf springs carry a three year or 60,000 kilometre warranty, whichever comes first, subject to the applicable terms.

That cover reflects where these springs are expected to work, which is loaded vehicles on corrugations and unsealed roads rather than sealed road running.

Find a Leaf Spring Kit for Your GUN126R GR SPORT (N80) 4WD HILUX

Select your GUN126R GR SPORT (N80) 4WD HILUX to see the leaf spring kits available for it across the load bands and lift heights, with the U-bolts, bushes and shackle hardware the application requires. Work out what your vehicle permanently carries before choosing a rating, since that is what decides whether it sits right loaded rather than only when empty.