ABOUT TJM

TJM Northern Beaches is Australia's premier 4WD specialist, serving Sydney and nationwide since 1973. We provide expert suspension upgrades, GVM modifications, bullbar installations, performance tuning, audio & multimedia upgrades, and complete touring setups for all major 4WD brands and models.

TJM Northern Beaches is located in Brookvale, on Sydney's Northern Beaches, serving customers from the North Beaches, Sydney CBD and the North Shore. We also provide Australia-wide shipping and remote support for customers nationwide.

We service and customise all major 4WD brands, including Toyota, Ford, Isuzu, Mazda, Nissan, Mitsubishi, KIA, RAM, emerging brands like INEOS and BYD, and many more. All our technicians are fully qualified mechanics and auto electricians or are doing an apprenticeship. TJM Northern Beaches is also a fully licensed mechanical workshop.

Due to the complexity of modern vehicles and the equipment required, all installations and services are done at our licensed workshop on Sydney’s Northern Beaches.

We accept Cash, Visa, Mastercard, Amex, all major credit cards, Bank Transfer, PayPal, ZIP Money, and offer flexible finance options through Afterpay and other approved lenders.

SHIPPING & DELIVERY FAQ

Metro areas: 2-5 business days, regional areas: 5-7 business days. Express shipping available for urgent orders. Large items like canopies may require freight delivery with longer timeframes and ad-hoc pricing.

Shipping costs are calculated at checkout based on item size, weight, and your location. We use Australia Post and courier services to ensure safe delivery. Installation items delivered to our workshop for fitting are included in service pricing.

Yes, tracking details are emailed once items ship. You can monitor progress through our online system or call for updates. In-store installation appointments include delivery coordination.

We inspect all items before shipping and use protective packaging. Report damage within 24 hours. Photos are required for damage claims processing.

STOCK & AVAILABILITY FAQ

We stock popular items for immediate dispatch. Specialised components may require ordering with 1-2 week delivery. Installation bookings include stock confirmation and delivery scheduling.

Call 1300 856 888 or email for real-time stock status. Our system shows current availability and expected restock dates. Online enquiries receive same-day responses.

Yes, we can order most manufacturers' products. Special orders typically take 1-2 weeks, depending on the supplier. We aim to provide accurate delivery estimates and progress updates.

Yes, we reserve all required parts when booking installation appointments. Items are held until your scheduled date, ensuring project completion without delays.

Installation & Service FAQ

Book 2-4 weeks for major installations during peak season. Simple jobs may be available sooner. Emergency repairs are accommodated when possible with priority scheduling.

Mobile consultation is available across Sydney's Northern Beaches. For quality assurance, all installations and services are completed at our licensed 4WD workshop in Brookvale. We can arrange pick-up and delivery for convenience.

We aim to provide accurate time estimates during booking. Unexpected issues are discussed before proceeding with additional costs. Customer approval is required for scope changes.

Yes, we service modifications regardless of the original installer. An assessment fee may apply for diagnosis. We can integrate new components with existing systems.

Yes, TJM products come with comprehensive 3-5 year warranties depending on the component. Our professional installations include workmanship guarantees, and we handle all warranty claims directly with manufacturers for quick resolution.

Unused items in original packaging have a 30-day return period. Installation items are non-returnable once fitted. Special orders are subject to manufacturer policies and restocking fees.

We handle all warranty claims directly with manufacturers. Provide purchase details and photos of issues. Most claims are processed within 5-7 business days, with our established supplier relationships ensuring excellent after-sales support.

Yes, extended coverage is available on most items with terms varying by manufacturer and product category. We explain all warranty options during the purchase consultation to ensure optimal protection.

We guarantee workmanship with comprehensive coverage and address issues immediately at no charge. Our reputation depends on customer satisfaction and quality results. We have a lifetime warranty on all installations.

Yes, you must declare all modifications to your insurer. Properly certified modifications typically don't increase premiums and improve legal compliance.

All our modifications maintain roadworthy compliance when professionally installed. We provide necessary certification and compliance documentation across all Australian states and territories.

Payment & Finance FAQ

Cash, major credit cards Visa and Mastercard, AMEX, EFTPOS, PayPal, Zip Pay, and bank transfers are accepted. Afterpay and other flexible finance options are available for eligible purchases. Business accounts are available for trade customers with approved credit.

Yes, we offer flexible payment options through approved lenders. Interest-free periods available on qualifying purchases. Application and approval are typically the same day for convenience.

Yes, deposits secure your booking and parts ordering. We usually take a 50% deposit with the balance due on completion or before delivery. We provide clear payment schedules for large projects.

Yes, trade pricing is available for qualified businesses. Account application required with ABN verification. Volume discounts available for fleet installations and bulk orders. One-day approval timeline. We handle compliance for all Australian states and territories with our national network of approved engineers.

Suspension Upgrades FAQ

Factory springs aren't designed for heavy touring loads, accessories, or towing equipment. This causes sagging because factory springs prioritise comfort over load capacity. Common technical causes include insufficient spring rates and progressive compression under sustained weight. TJM Northern Beaches analyses your specific requirements using weighbridge data to recommend precise spring rates and upgrades.

Coil springs provide better ride quality for touring, while leaf springs offer higher load capacity for work. Coil springs allow independent wheel movement (150-200mm travel) compared to leaf springs (100-120mm travel). Load capacity varies: coil springs handle 400-600kg, leaf springs support 800-1200kg+. Our qualified technicians determine the optimal setup for your individual purpose and goals.

A properly matched suspension upgrade actually improves ride quality when loaded, while maintaining comfort when empty. Modern aftermarket suspension uses progressive spring rates and tuned damping. We select components based on your load requirements and driving style for optimal performance.

Most suspension upgrades provide 40-50mm of lift for improved approach and departure angles. Additional clearance comes from larger tyres within legal limits. Our installations maintain proper suspension geometry for safe handling characteristics.

Quality suspension lasts 5-10+ years with normal use. Heavy-duty components like TJM, Tough Dog, XGS Remote, JMACX and Lovells are engineered for Australian offroad conditions. We back all installations with comprehensive warranties and ongoing support.

Professional suspension installation ensures proper alignment, safety compliance, and warranty coverage. Suspension work requires specialised tools and expertise for optimal performance. TJM Northern Beaches provides certified installation with full compliance documentation. Experienced DIY mechanics can purchase components for self-installation, but professional alignment is still recommended for safety and performance.

Yes, every suspension upgrade requires professional wheel alignment. This ensures proper tyre wear, handling, and safety compliance. We include alignment in all suspension packages as standard service.

Highway towing requires load-rated springs with anti-sway characteristics. Off-road touring needs extended travel shocks with progressive springs. We match components to your primary use case for optimal results.

Suspension upgrades cost $2,500-$5,000 fitted, depending on the vehicle and components. Standard kits start from $2,500; premium remote-reservoir systems cost $4,000-$5,000 and more. TJM Northern Beaches offers package deals to match your specific 4X4 needs and budget.

ADR-compliant suspension installed by qualified technicians maintains full warranty coverage. We provide full compliance documentation using only approved components. Your manufacturer's warranty remains intact with professional installation. The suspension warranty, however, is with TJM Northern Beaches, not the vehicle manufacturer.

Canopies & Roller Covers FAQ

Canopies provide maximum security with lockable storage, while roller covers offer easy access and lower weight. Canopies suit tradies and serious tourers, roller covers work for recreational users. TJM Northern Beaches stocks premium options from the top leading manufacturers.

Yes, electric covers provide convenience with remote operation. Popular brands like HSP offer systems that integrate with your vehicle’s factory security system. We specialise in electric installation for all brands, including KIA Tasman and BYD Shark 6.

Canopies can add 60-100kg, affecting rear weight distribution. This often requires suspension adjustment or GVM upgrade for handling and compliance. Our team calculates impact and recommends the right modification options for you.

Roller covers range $1,500-$3,500, while canopies cost $2,000-$8,000+, depending on features. We offer package deals with suspension or GVM upgrades for significant savings.

Professional installation ensures proper mounting, electrical integration, and warranty coverage. Canopies require precise drilling and electrical work for optimal fit and function. TJM Northern Beaches provides certified installation with full compliance documentation. Experienced DIY installers can purchase canopies for self-installation, though professional electrical integration and mounting verification are recommended for safety and warranty protection.

Roof Racks & Load Management FAQ

Most racks handle 75-100kg static, or 50-75kg dynamic driving load. Consider typical gear: roof-top tent (50-100kg), awning (20-30kg), recovery tracks (10kg), and others. We calculate total loads and recommend appropriate systems for your requirements.

Most vehicles accommodate racks, but load limits vary significantly. Factory limits range 75 kg-100 kg+, depending on your vehicle. TJM Northern Beaches matches the right rack systems to specifications.

Roof racks use rails for flexible mounting, while platforms provide a solid base for heavy items. Platforms handle higher loads but create more resistance. We recommend the right solution for you based on your requirements and vehicle.

Check the owner's manual roof rating to never exceed the limit. Include rack weight plus cargo in your calculations. TJM Northern Beaches provides both roof load calculations and compliance advice.

BYD Shark 6 Specialists FAQ

As Sydney's premium BYD specialists, we offer electric roller covers, premium canopies, roof and load management systems. Shark 6 suspension and bullbar upgrades - coming soon*. Specific accessories include HSP electric covers with app control, LED-equipped canopies, and custom drawer systems. We're pioneering the Australian aftermarket development for hybrid platforms.

Yes. We are developing custom engineering solutions for BYD platforms with our partners. Hybrid vehicles require specialised analysis of battery placement and weight distribution. Our team develops ADR-compliant solutions.

ADR-compliant modifications by authorised technicians typically maintain warranty coverage. Hybrid vehicles may have specific requirements. TJM Northern Beaches works with BYD Australia, ensuring warranty protection.

Hybrid vehicles require electrical system and weight distribution considerations. Battery placement affects the centre of gravity and calculations. Our technicians are trained in compliant hybrid modifications and safety.

Yes, we're developing suspension solutions with our suppliers for BYD's hybrid platform. Custom engineering considers battery weight and vehicle dynamics. We're leading aftermarket suspension solutions for the Shark 6.

Bullbar Installation FAQ

Bullbars protect against animal strikes, provide accessory mounting points, and improve approach angles for off-road driving. Essential for driving on the highway, in the country, and for remote touring safety.

Steel bullbars offer maximum protection and winch mounting strength, but can add 50-100kg of weight. Alloy bullbars provide excellent protection at 35-50kg weight, ideal for touring builds. The choice ultimately depends on your needs and intended use.

All our bullbars are ADR-compliant and designed to work with a vehicle's airbag systems. Professional installation ensures proper compatibility and safety system function. *Note that the additional steel structure may alter impact characteristics and deployment thresholds compared to the factory configuration. This information is general in nature - consult your vehicle manufacturer and insurance provider for specific safety guidance regarding your vehicle and circumstances.

No, only winch-compatible bullbars can safely mount electric winches. We stock winch-ready steel and heavy-duty alloy bars rated for 9,000-12,000lb winches.

ADR-compliant bullbars don't require individual certification when professionally installed. We ensure all installations meet Australian Design Rules and state regulations.

Steel bullbars may slightly increase fuel consumption due to added weight and wind resistance. Aerodynamic alloy designs minimise fuel economy impact.

Yes, we offer professional powder coating and paint matching services. Custom colors and finishes are available to suit your vehicle's appearance.

Most bullbar installations take 4-8 hours, depending on accessories being fitted. Complex installations with winches and lighting may require a full day.

Performance Modification FAQ

Warranty impact depends on your dealer and the specific modification. We use conservative, proven tunes and can advise on warranty-friendly options for your vehicle.

Most modern diesels can safely gain 20-40% more torque and power with professional tuning. We use conservative parameters that maintain reliability while delivering noticeable improvements.

‘Piggyback’ chips modify signals without changing ECU software, while remaps directly alter ECU programming. Remaps typically provide smoother, more integrated results.

Quality tuning often improves fuel economy by optimising engine efficiency, especially when towing or touring. Results vary based on vehicle, driving style, and conditions.

Performance exhausts and Snorkels maximize tuning benefits and reduce engine strain. We recommend supporting mods for best results and reliability.

Yes, when using ADR-approved components within emissions and noise limits. We ensure all modifications meet Australian compliance standards.

Yes, most performance modifications can be returned to factory specification if required.

Snorkel Installation FAQ

A snorkel relocates air intake from under the hood to roof height, providing cleaner, cooler air and protection from dust and water. It's not just for water crossings - it improves performance in dusty conditions.

No, a snorkel only protects the engine air intake. You must still consider diff breathers, transmission vents, and electronics height. Maximum safe depth varies by vehicle.

Yes, snorkels can improve performance by drawing cooler, denser air and reducing intake restriction. Benefits are most noticeable in dusty or hot conditions.

Plastic snorkels are lighter, UV-resistant, and cost-effective with a factory appearance. Steel snorkels are stronger, available in larger diameters, and offer custom styling options.

You may notice slight induction noise under heavy acceleration, but most customers find it minimal. Sound levels remain within legal limits.

While possible, professional installation ensures proper sealing, positioning, and finish quality. Poor installation can lead to water ingress or engine damage.

Audio & Multimedia FAQ

Yes, we can add Apple CarPlay and Android Auto to most vehicles through aftermarket integration or head unit replacement. We maintain factory steering wheel controls and safety features.

No, professional installation maintains all factory functions, including air conditioning controls, reverse cameras, and vehicle information displays.

You'll experience dramatically clearer highs, deeper bass, and distortion-free volume compared to factory speakers. Even basic upgrades provide significant improvements.

No, properly installed systems only draw power when in use. For high-power setups, we can install dual battery systems to ensure reliable starting.

Touring & Expedition FAQ

An expedition-ready 4WD includes a GVM upgrade for load capacity, long-range fuel and water storage, dual battery system, recovery gear, and communication equipment for complete self-sufficiency.

Complete touring packages range from $8,000-$20,000+, depending on your requirements. Basic setups start around $5,000, while full expedition builds can exceed $25,000.

GVM upgrade and heavy-duty suspension are foundational, allowing you to legally carry essential gear. Dual battery systems and communication equipment are critical for safety.

Toyota LandCruiser 300/200 series offers the best combination of reliability, comfort, and parts availability. Isuzu D-MAX and Ford Ranger are also popular for their proven durability.

Yes, Fraser Island requires sand-driving setup and corrosion protection, while Cape York needs water-crossing preparation and extended range capabilities. We customise 4WD builds for specific destinations.

We assess your vehicle, typical loads, destinations, and budget to create a tailored solution. Our experience with Australian touring conditions ensures optimal component selection.

Technical & Specification FAQ

Suspension: TJM, Tough Dog, and JMACX for reliability. Bullbars: TJM for ADR compliance. Performance: Safari and Torqit for proven results. Brand selection depends on specific requirements.

TJM Northern Beaches assesses your vehicle, typical loads, driving style, and destinations to select optimal components. Our experience ensures proper matching for performance and durability.

Yes, we service and upgrade vehicles regardless of where previous work was completed. We assess existing modifications and integrate new components properly.

We offer expert advice and can supply components for capable DIY enthusiasts. However, we recommend professional installation for safety-critical modifications and compliance.

Quality modifications require minimal additional maintenance beyond normal vehicle servicing. We provide maintenance schedules and can perform all ongoing service requirements.

Contact & Service FAQ

Call 1300 856 888 for immediate advice, visit our showroom for hands-on consultation, or email us with your vehicle details and requirements. We provide detailed written quotes for all work.

Yes, package deals often save thousands compared to individual purchases. Common packages combine suspension, GVM, bullbar, and accessories for maximum value.

Installation times vary by season and complexity. We do our best to accommodate urgent requirements when possible, but recommend booking 2-4 weeks ahead for all work.

Yes, we provide ongoing technical support, warranty service, and additional modifications as your needs evolve. Our customer relationships often span decades.

Yes, we ship genuine TJM and quality aftermarket parts nationwide from top 4WD brands and suppliers. Many components can be installed by local workshops with our technical support.

COMPLETE GVM UPGRADE GUIDE FAQ

GVM Fundamentals

GVM means Gross Vehicle Mass - your vehicle's maximum legal weight, including passengers, fuel, and cargo. This represents structural and legal limits determined by engineering, braking capacity, and chassis strength. Exceeding GVM violates compliance and voids insurance coverage. TJM Northern Beaches provides weighbridge testing to determine your compliance status.
GVM is vehicle-only weight; GCM includes vehicle plus trailer combined weight. A GVM upgrade increases vehicle capacity but doesn't change towing limits. Separate trailer modifications may be needed for increased towing capacity. Our technical team explains these differences during consultation.
Payload is the weight you can add to an empty vehicle. Calculation: Payload = GVM minus tare weight (empty vehicle + fuel + driver). GVM upgrades increase both figures proportionally. We calculate exact payload increases for your specific requirements.
Visit a public weighbridge with your vehicle fully loaded as you typically travel. If you are within 100kg of GVM or over the limit, you need a GVM upgrade. Many customers are surprised by the actual loaded weight of their vehicle. TJM Northern Beaches arranges weighbridge testing with detailed analysis reports in-house.

Who Needs GVM Upgrades

You need GVM upgrade if you exceed 80% of factory GVM with typical loads. This includes heavy accessories (bullbar 60kg, winch 40kg, canopy 80kg), caravan towing over 2,500kg, or remote area travel requiring extended supplies. Our assessment process identifies who will benefit most from an upgrade.
You may not need an upgrade if you stay well under factory GVM limits. This applies to light recreational users, primarily commuting vehicles, or confirmed compliant weighbridge data. We provide honest assessments without recommending unnecessary modifications.
Suspension upgrades improve handling within factory weight limits. GVM upgrades legally increase carrying capacity by 300-1400kg through certified engineering and components. TJM Northern Beaches offers both, depending on your specific requirements.
Choose suspension for better handling within vehicle weight limits. Upgrade GVM when you exceed factory limits with accessories or towing. Our consultation process determines the right solution for you.

Pre vs Post Registration Strategies

Pre-registration offers significant advantages: higher resale value, no paperwork changes, often lower cost, bigger lift and tyre sizes, and simpler insurance. Modifications appear as factory specifications with a clean compliance history. TJM Northern Beaches specialises in pre-registration upgrades for maximum benefit.
Yes, pre-registration upgrades are completed before the first registration. This offers the best value by avoiding modification paperwork and maintaining resale value. We coordinate with dealerships for pre-delivery GVM upgrades across all major 4x4 brands.
Pre-registration: no paperwork changes, higher resale value. Post-registration: requires engineering documentation and registration amendments. Our team guides you through optimal timing decisions to choose the right GVM upgrade.

Technical Engineering & Components

GVM upgrades typically increase capacity by 300-1400kg, depending on vehicle limits. Toyota LandCruiser 300 gains up to 900kg, Ford Ranger typically 400kg, and Isuzu D-MAX commonly 500kg. Our engineers determine maximum safe increases through structural analysis.
GVM upgrades engineer springs, shock absorbers, mounting points, and often brake components. All components are matched to increased vehicle mass with documented performance standards. TJM Northern Beaches uses only ADR-approved components with certification.
No, only specifically engineered and ADR-approved components qualify for a GVM upgrade. Standard suspension lacks the required engineering certification for legal capacity increases. We stock certified kits from the top approved manufacturers.
GVM suspension is engineered and certified for increased vehicle mass. Regular suspension may offer similar capacity but lacks legal certification. Our GVM kits meet all ADR requirements.
Modern vehicles often have adequate braking for GVM increases. However, engineering assessment may require brake upgrades if stopping distances exceed standards. We perform comprehensive brake analysis with every upgrade, and recommend brake upgrades regardless.

GVM Legal Compliance & State Requirements

Yes, all GVM upgrades require engineering certification by licensed engineers. We handle all paperwork through our network of approved signatories across Australia.
ADR are federal standards; states add specific requirements. NSW uses VSI 30, VIC uses VSI standards, QLD has MVS guidelines for GVM upgrades. TJM Northern Beaches ensures compliance with both state and federal standards.
Yes, each state has specific compliance processes with different timelines:
NSW: VSI 30, 28-day approval
VIC: VSI standards, 21-day processing
QLD: MVS guidelines, 35-day cycle
WA: DoT compliance, 42-day processing
SA: REGENCY standards, 28-day timeline
TAS: Transport Tasmania, 21-day process
We handle compliance nationwide with our approved engineer network.
Yes, when using ADR-approved components and proper certification. We ensure compliance with federal and state requirements regardless of location.

Costs & Installation

GVM upgrades cost $4,000-$45,000+ fitted and certified. Pre-registration often provides better value with simplified processes. TJM Northern Beaches offers transparent pricing with no hidden costs.
Pricing includes suspension components, installation, engineering certification, paperwork, and alignment. No additional fees or hidden costs. We provide comprehensive packages with warranty coverage.
GVM upgrades take 1-2 days, including engineering inspection and certification. Pre-registration may be faster, while complex builds take longer. We provide accurate timeframes during consultation.
Popular vehicles include Toyota LandCruiser (+900kg), Prado (+300-600kg), Ford Ranger (+400kg), Isuzu D-MAX (+500kg), KIA Tasman, BYD Shark 6 with custom engineering, and many more. As Sydney's premier BYD specialists, we lead hybrid upgrades.

Insurance & Safety

Certified upgrades improve coverage by maintaining legal compliance. Overweight operation voids insurance claims. Upgrading your GVM prevents this. You must declare modifications, but certified GVM upgrades typically don't increase premiums. We provide all documentation.
Penalties include fines, defect notices, voided insurance, and accident liability. Commercial operators face workplace safety violations. Legal operation protects business and personal liability.
Properly engineered suspension maintains or improves handling while accommodating increased capacity. Some firmness increase is normal with higher ratings. Our selection prioritises both capacity and comfort for your requirements.

Ongoing Compliance & Maintenance

Annual weighbridge checks ensure ongoing compliance as accessories are added. Many customers gradually add weight without realising limits. We provide ongoing consultation for compliance.
Yes, within your new certified capacity. Additional major accessories may require re-engineering. TJM Northern Beaches plans for future modifications during your GVM consultation.
Technically possible but rarely practical due to certification requirements. Pre-registration upgrades are particularly difficult to reverse. Consider long-term needs during planning.
You receive ADR certificates, engineering certification, installation docs, weight specifications, and registration paperwork. We provide digital copies for easy access and compliance verification.

Common Myths & Misconceptions

Common myths include: "Any suspension increases GVM" (false - needs certification), "GVM equals towing capacity" (false - separate limits), "GVM voids warranty" (false if ADR-compliant).
Our technical team will educate you on GVM facts vs fiction.
GVM upgrades increase vehicle payload but don't change towing capacity. You can carry more while towing the same trailer weight. Separate upgrades may be available for increased towing, commonly known as BTC or Brake Towing Capacity.

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