The 70 Series LandCruiser is built to handle tough terrain and heavy loads, but standard components can still wear quickly under repeated stress.

This is where Terrain Tamer’s Fortified Parts range comes in, as it’s designed to address the weak points of the 70 Series and other heavy-duty 4x4s. Unlike the regular product line, which focuses on OE-style replacements for general to5uring and light off-road use, the Fortified range is made for vehicles that carry heavy loads, tow excessive weights or regularly travel off the beaten track. It combines tougher materials with purpose-built designs for the parts that take the most strain: Wheel bearings, suspension, shocks, brakes and clutch. Let’s take a closer look 👇

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Heavy Duty Wheel Bearing Kits

Wheel bearings are a common point of failure in heavily loaded vehicles, or for those which head off the beaten track. 

Terrain Tamer Heavy Duty Wheel Bearing Kits use Japanese-made bearings with upgraded forging and heat treatment, giving them a Rockwell hardness rating 2.5 points higher than standard equipment. This makes them better able to resist wear and contamination, helping them last significantly longer in harsh conditions.

The kit also includes heavy-duty hub seals that rotate on their own internal surface. This reduces wear on the shaft and surrounding components while keeping dirt, mud and water out. Everything needed for installation – including gaskets, nuts and washers – is included, and the kit comes with a 12-month warranty. The kits are available for both disc and drum brake hubs on the 70 Series, making them suitable for front or rear fitment.

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Parabolic Leaf Springs

Standard leaf springs can be stiff, noisy, and uncomfortable, especially under load. 

Terrain Tamer Parabolic Leaf Springs differ from traditional multi-leaf packs because they use fewer leaves that are tapered – thickest in the middle and gradually thinner toward the ends – giving them a curved, “parabolic” profile. This allows the spring to bend more progressively under weight, reducing unsprung mass and making it easier for the suspension to absorb bumps and impacts.

The design helps smooth out rough terrain by reducing shock transferred to the crown wheel and pinion, while improving axle articulation so the wheels can better follow uneven tracks. Minimal contact between leaves reduces noise, friction and corrosion. So if a 70 Series is lightly loaded or carrying a full payload, the parabolic springs will ensure a more controlled, comfortable ride without compromising strength or load-carrying ability.

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Fortified Shock Absorbers

Fortified Shock Absorbers are designed for vehicles – including the 70 Series – that carry heavy loads or spend extended time off-road.

Compared with standard replacement shocks, the monotube, single-body design uses a large 2.5-inch (64mm) bore and increased oil volume, which helps manage heat more effectively and reduce the likelihood of shock fade during prolonged use or sustained heavy loading.

Rated for vehicles up to five tonnes, the Fortified shocks are designed to maintain consistent damping under load. The monotube construction dissipates heat more effectively than conventional twin-tube designs, helping performance remain stable over long distances and repeated impacts, resulting in improved ride control and stability.

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Fortified Brake Upgrade Kits

Braking can be a weak point for heavily loaded 70 Series vehicles, particularly when towing or driving on steep tracks. 

Terrain Tamer’s Fortified Brake Kits combine a Heavy Duty Brake Booster with high-performance rotors, braided hoses and Fortified Brake Pads to improve stopping power and pedal feel.

The dual-diaphragm booster reduces pedal effort while increasing braking performance by up to 30 per cent in both ABS and non-ABS vehicles. The front and rear slotted and dimpled rotors, braided hoses and copper-free ceramic pads provide consistent braking under heavy use, reduce dust, and resist wear. The pads feature a red bedding-in coating to help manage heat during extended downhill runs or repeated braking. DOT4 brake fluid is supplied, and installation requires a qualified mechanic and engineer sign-off to meet ADR requirements. 

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Fortified Plus Clutch

The Fortified Plus Clutch is designed for 70 Series vehicles that see heavy loads or off-road use.

Using Clutchtex Kevlar friction material, the clutch can handle up to 80 per cent more torque than standard clutches, while still providing smooth engagement.

The clutch cover has higher clamp loads, extra drive straps where needed, anodised corrosion resistance, and a spheroidal graphite anti-burst casting. The disc features a three-stage damper (where applicable), reinforced friction material, and stronger damper springs. This ensures reliable power transfer, absorbs shock to the drivetrain, and maintains performance under load.

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