Fabryka 4x4 Aluminium Gearbox Guard for Toyota Land Cruiser 100 J100 Diesel Automatic 1998–2007 – 6mm

The Fabryka 4x4 Aluminium Gearbox Guard is a heavy-duty, vehicle-specific underbody protection plate designed for Toyota Land Cruiser 100 / J100 diesel models with automatic transmission manufactured between 1998 and 2007.

Manufactured from substantial 6mm aluminium plate, this transmission skid plate protects the gearbox from rocks, deep ruts, raised ground, mud, branches and other obstacles encountered during off-road driving, overlanding and expedition travel.

The protection plate is precision laser cut, formed using a press brake and hand finished to provide accurate vehicle-specific fitment and a strong finished structure capable of protecting the transmission in demanding terrain.

Important Fitment: This version is specifically designed for diesel Toyota Land Cruiser J100 models with automatic transmission. Separate gearbox guards are available for other drivetrain configurations.

Vehicle Compatibility: Toyota Land Cruiser 100 / J100 1998–2007

Engine: Diesel

Transmission: Automatic

Product Code: OLD

Build your Toyota Land Cruiser 100 aluminium underbody protection package:
Fabryka 4x4 Aluminium Engine & Sump Guard for Toyota Land Cruiser 100
Fabryka 4x4 Aluminium Gearbox Guard – Diesel Automatic
Fabryka 4x4 Aluminium Transfer Case Guard – Diesel Automatic
Fabryka 4x4 Aluminium Transfer Case Guard – Petrol Automatic
Fabryka 4x4 Aluminium Gearbox Guard – Petrol Automatic
Fabryka 4x4 Aluminium Transfer Case Guard – Diesel Manual
Fabryka 4x4 Aluminium Gearbox Guard – Diesel Manual

Steel protection alternatives:
Steel Engine & Sump Guard for Toyota Land Cruiser J100 1998–2008
Steel Gearbox Guard for Toyota Land Cruiser J100 1998–2008

Explore more underbody protection:
Steel & Aluminium Underbody Protection

Key Features

• Designed specifically for Toyota Land Cruiser 100 / J100 diesel automatic models
• Vehicle application: 1998–2007
• Protects the gearbox / transmission from underside impacts
• Manufactured from heavy-duty 6mm aluminium plate
• Precision laser-cut construction
• Press-brake formed for accurate vehicle-specific fitment
• Hand finished during production
• Required mounting components included
• Can be removed when transmission servicing requires additional access
• Excellent corrosion resistance
• Suitable for off-road, overland, touring and expedition vehicles

Vehicle Compatibility

Important Engine & Transmission Compatibility

This gearbox guard is not a universal Land Cruiser 100 skid plate.

This Fabryka 4x4 OLD version is designed specifically for:

• Toyota Land Cruiser 100 / J100
• 1998–2007 models
• Diesel engine
• Automatic transmission

Different protection plates are available for other J100 drivetrain configurations, including petrol automatic and diesel manual models.

Please confirm the vehicle's engine and transmission configuration before ordering.

Technical Overview

Heavy-Duty Gearbox Protection

The gearbox is one of the most important and expensive drivetrain components underneath the Toyota Land Cruiser 100.

When the vehicle is driven across rocky tracks, deep ruts or uneven terrain, the transmission can become exposed to direct contact with obstacles positioned underneath the centre of the vehicle.

A severe impact can damage the gearbox casing or surrounding components, potentially causing lubricant loss, transmission problems or expensive mechanical repairs.

This Fabryka 4x4 aluminium gearbox guard creates a substantial protective barrier beneath the transmission, helping reduce the risk of direct impact damage.

6mm Aluminium Construction

The gearbox guard is manufactured from substantial 6mm thick aluminium plate.

The considerable material thickness provides strong protection for the gearbox while retaining the advantages that make aluminium particularly suitable for underbody armour.

Benefits include:

• Strong impact resistance
• Lower weight than comparable heavy steel armour
• Excellent natural resistance to corrosion
• Suitability for mud, water and wet environments
• Long-term durability for touring and off-road use

Precision Laser-Cut Construction

The aluminium plate is precision laser cut during production.

Laser cutting allows the mounting points, edges and plate profile to be produced accurately and consistently, which is particularly important for a vehicle-specific skid plate that must fit closely around drivetrain components.

Press-Brake Formed & Hand Finished

After cutting, the aluminium plate is formed using a press brake to create the required profile and structural shape.

The product is then hand finished as part of the manufacturing process.

This combination of precision fabrication and manual finishing produces a protection plate designed specifically around the underside of the Land Cruiser 100 diesel automatic drivetrain.

Designed for Diesel Automatic J100 Models

The shape and position of the gearbox varies according to drivetrain specification, which is why Fabryka 4x4 produces dedicated guards for different Land Cruiser 100 configurations.

This particular product is specifically for the diesel automatic configuration.

Owners of petrol automatic or diesel manual vehicles should select the corresponding transmission-specific protection plate rather than attempting to use this version.

Pair with the Diesel Automatic Transfer Case Guard

For more complete drivetrain protection, this gearbox guard can be combined with the matching Fabryka 4x4 6mm Aluminium Transfer Case Guard for the diesel automatic J100.

• 6mm Aluminium Gearbox Guard – Diesel Automatic – this product
• 6mm Aluminium Transfer Case Guard – Diesel Automatic

Using both components provides dedicated protection for the transmission and transfer case rather than leaving one of these important drivetrain areas exposed.

Add Front Engine & Sump Protection

A matching Fabryka 4x4 aluminium engine protection plate is also available for the Land Cruiser J100.

Fabryka 4x4 Aluminium Engine & Sump Guard for Toyota Land Cruiser 100 J100

Combining the engine guard with the gearbox and transfer case guards creates a significantly broader aluminium protection system beneath the vehicle.

Land Cruiser 100 Aluminium Underbody Protection Range

The Fabryka 4x4 Land Cruiser 100 range includes several protection plates developed for different drivetrain configurations.

• Aluminium Engine & Sump Guard – J100
• Aluminium Gearbox Guard – Diesel Automatic – this product
• Aluminium Transfer Case Guard – Diesel Automatic
• Aluminium Gearbox Guard – Petrol Automatic
• Aluminium Transfer Case Guard – Petrol Automatic
• Aluminium Gearbox Guard – Diesel Manual
• Aluminium Transfer Case Guard – Diesel Manual

Steel Underbody Protection Alternatives

For Land Cruiser 100 owners who prefer traditional steel protection, dedicated steel guards are also available.

• Steel Engine & Sump Guard for Toyota Land Cruiser J100 1998–2008
• Steel Gearbox Guard for Toyota Land Cruiser J100 1998–2008

This gives owners the choice between substantial aluminium protection and heavy-duty steel armour depending on vehicle use, build weight and personal preference.

Aluminium vs Steel Gearbox Protection

Protection for Off-Road & Expedition Use

The gearbox guard is suitable for Land Cruiser 100 vehicles used on demanding terrain where the underside can regularly contact obstacles.

Typical hazards include:

• Rocks and exposed stone
• Deep wheel ruts
• Raised centre sections
• Tree roots
• Branches
• Mud and trail debris
• Hidden obstacles during water crossings
• Uneven forestry and agricultural tracks

Ideal Uses

• Overlanding
• Expedition travel
• Green-laning
• Rocky tracks
• Deep ruts
• Forestry and agricultural roads
• Remote touring
• Water crossings
• Working 4x4 vehicles
• Land Cruiser 100 builds requiring additional transmission protection

What’s Included

• 1 × Fabryka 4x4 6mm aluminium gearbox guard
• Required mounting components

Product Code: OLD

Note: Minor product details may differ from the product photographs as part of ongoing manufacturing development.

Installation

• Vehicle-specific fitment for Toyota Land Cruiser 100 / J100
• Designed specifically for diesel automatic models
• Required mounting components supplied
• Confirm engine and transmission configuration before installation
• Position all mounting points before final tightening
• Check clearance around the gearbox, exhaust and surrounding drivetrain components
• Re-check all mounting hardware after initial off-road use
• The guard can be removed if additional gearbox access is required for servicing

Professional installation is recommended where the vehicle has previous transmission, exhaust, suspension or underbody modifications.

FAQs

Q1: What vehicle does this gearbox guard fit?
A: It is designed for Toyota Land Cruiser 100 / J100 diesel models manufactured between 1998 and 2007 and fitted with an automatic transmission.

Q2: Is this suitable for HDJ100 diesel automatic models?
A: This guard is designed for the diesel automatic Land Cruiser 100 / J100 application. Vehicle specification should always be confirmed before ordering.

Q3: Does this gearbox guard fit petrol automatic models?
A: No. A separate Fabryka 4x4 aluminium gearbox guard is available specifically for petrol automatic J100 models.

Q4: Does it fit diesel manual Land Cruiser 100 models?
A: No. A separate gearbox guard is available specifically for diesel manual versions.

Q5: How thick is the aluminium?
A: The gearbox guard is manufactured from 6mm thick aluminium.

Q6: What component does this guard protect?
A: It protects the gearbox / transmission against direct underside impacts from rocks, ruts and other obstacles.

Q7: How is the guard manufactured?
A: The aluminium plate is precision laser cut, formed using a press brake and then hand finished.

Q8: Is mounting hardware supplied?
A: Yes. The required mounting components are included.

Q9: Is a matching transfer case guard available?
A: Yes. A matching Fabryka 4x4 6mm aluminium transfer case guard is available specifically for diesel automatic Land Cruiser 100 models.

Q10: Is an aluminium engine guard available?
A: Yes. A Fabryka 4x4 aluminium engine and sump guard is also available for the Land Cruiser 100.

Q11: Can I build a wider aluminium protection system?
A: Yes. This gearbox guard can be combined with the appropriate engine and transfer case protection plates for broader underbody coverage.

Q12: Why is the transmission type important?
A: Gearbox dimensions and mounting arrangements differ between drivetrain configurations, so the correct diesel automatic, petrol automatic or diesel manual protection plate must be selected.

Q13: Is a steel gearbox guard available?
A: Yes. OFM4x4 also offers a steel gearbox protection option for the Toyota Land Cruiser J100.

Q14: Is this suitable for off-road and expedition use?
A: Yes. The substantial 6mm aluminium construction is designed to protect the transmission from hazards encountered during demanding off-road, overland and expedition driving.

Why Buy from OFM4x4.CO.UK

• Toyota Land Cruiser off-road upgrade specialists
• Fabryka 4x4 vehicle-specific protection products
• Diesel automatic, diesel manual and petrol automatic J100 protection options
• Choice of aluminium and steel Land Cruiser 100 underbody protection
• Technical support before and after purchase
• UK-based customer service