Toughdog Rear Coil Springs for Toyota LandCruiser 300 Series — Heavy Duty Pair

These Toughdog rear coil springs are primarily designed as heavy-duty replacement springs to restore correct ride height when carrying constant accessory loads, rather than dedicated lift springs. Depending on the spring rate selected and your current load, they will typically restore sagging rear suspension to factory height or provide 0-25mm of additional height when properly loaded. The actual ride height achieved depends entirely on the spring rate you select and the constant weight your vehicle carries - heavier spring rates with lighter loads will sit higher, while appropriately matched spring rates will maintain optimal geometry. If you're specifically seeking suspension lift for your LandCruiser 300, consider a complete matched lift kit that includes front and rear components for balanced geometry.

This kit includes a pair (2 springs) of Toughdog heavy-duty rear coil springs precision-engineered for the LandCruiser 300 Series rear axle. Each spring features premium alloy steel construction with advanced corrosion-resistant powder coating and load-rating identification tags. The springs are supplied ready to install and include fitment documentation with load specifications. However, spring isolators, spring seats, shock absorbers, and installation hardware are not included and must be reused from your existing setup or purchased separately if replacement is required. We recommend inspecting all associated suspension components during installation and replacing any worn bushes, shock absorbers or hardware for optimal performance.

Absolutely - these Toughdog rear coil springs are excellent for LandCruiser 300 owners who regularly tow caravans, camper trailers, or heavy equipment. When correctly matched to your constant accessory load, they significantly reduce rear-end squat during towing, maintaining proper suspension geometry and improving stability, braking performance and headlight aim. The increased spring rate helps control body roll and maintains safer weight distribution when navigating corners or emergency manoeuvres while towing. For ultimate towing versatility and the ability to adjust ride height based on trailer weight, many LandCruiser owners pair upgraded rear springs with adjustable airbag suspension systems for on-demand load support that can be tuned to different towing scenarios.

For standard spring replacements on the LandCruiser 300 that maintain factory ride height, upgraded control arms are typically not required as the suspension geometry remains within factory specifications. However, if you're selecting a heavier spring rate that provides additional lift, or if you're building a complete suspension system with front lift components, upgraded heavy-duty control arms are highly recommended to maintain correct suspension geometry and articulation. Control arm upgrades become essential when total lift exceeds 50mm, as they correct castor angles and prevent premature wear on bushings and ball joints. Our suspension experts can assess your complete build and recommend whether control arm upgrades would benefit your specific LandCruiser 300 setup.

Yes, a comprehensive four-wheel alignment is absolutely mandatory after installing any replacement or upgraded coil springs on your LandCruiser 300. Even though these are rear springs, changing rear ride height affects the entire vehicle's suspension geometry, weight distribution and steering characteristics. Professional alignment ensures correct toe, camber and thrust angles are restored, preventing premature and uneven tyre wear, improving handling stability, and maintaining safe predictable steering response both on-highway and off-road. Most reputable 4WD workshops will include alignment in their installation quote, and the investment pays for itself many times over through extended tyre life and improved vehicle dynamics.

Yes - Toughdog manufactures these LandCruiser 300 rear coil springs in multiple spring rates specifically so you can select the perfect match for your constant accessory load. It's crucial to select spring rates based only on the permanent weight your vehicle carries at all times, not occasional loads like camping gear or towing weights. Our team will help you calculate your constant rear load by tallying accessories like drawers, dual batteries, fridges, water tanks, rear bars and permanent recovery equipment. Selecting too heavy a spring rate for your actual load will result in an unnecessarily harsh ride, while too light a rating will cause sagging and poor handling - correct spring rate selection is the foundation of excellent suspension performance.

These rear coil springs alone provide minimal to moderate lift depending on spring rate and load, so tyre fitment gains will be limited compared to a complete lift kit. The LandCruiser 300 from factory can accommodate up to approximately 33-inch tyres with minimal modifications, and these springs may provide clearance for slightly larger tyres if they increase ride height. However, for significantly larger tyres (34-35 inches), you'll need a complete matched suspension lift kit for both front and rear, potentially combined with body mount chop or aftermarket upper control arms to achieve adequate clearance without rubbing. Front suspension modifications are typically more critical for tyre clearance than rear springs alone, so consider your complete build plan when selecting suspension components.

Toughdog backs these rear coil springs with comprehensive manufacturer warranty coverage that protects against defects in materials and workmanship, giving you confidence in your investment. Specific warranty terms and duration are provided with your purchase and typically cover structural failures, premature sagging beyond normal settling, and manufacturing defects when the springs are installed correctly and used within their design parameters. To maintain warranty validity, springs must be installed by a qualified technician, matched to appropriate load ratings, and used in conjunction with suitable shock absorbers and suspension components. Warranty does not typically cover damage from accidents, improper installation, overloading beyond spring rating, or modifications - full warranty terms are available on request from our team.

Absolutely - when correctly matched to your vehicle's constant load, these Toughdog rear coil springs deliver excellent ride quality for daily driving while providing the load-carrying capability you need for touring and work. Unlike harsh commercial-spec springs, Toughdog's engineering focuses on balancing load support with ride comfort, so your LandCruiser 300 remains comfortable for the school run, commuting and highway driving. The key is selecting the appropriate spring rate for your actual constant load - correctly specified springs will feel comfortable unloaded while maintaining composure under load. Many LandCruiser 300 owners find their ride quality actually improves after installing appropriately rated Toughdog springs, especially if their factory springs had begun to sag from carrying heavy accessories.