Longfield Chromoly Gun-Drilled Birfield & Axle Super Set (30-Spline) – Toyota Land Cruiser 80 Series (301720-1-KIT)

The ultimate front axle upgrade for serious off-road builds. The Longfield Chromoly Gun-Drilled Birfield & Axle Super Set (30-Spline) is designed for the Toyota Land Cruiser 80 Series, delivering maximum strength, serviceability and long-term reliability.

This premium kit replaces both birfields and axle shafts with heavy-duty chromoly components and features a gun-drilled, greaseable design for easy maintenance without full disassembly.

Why This Is the “Super Set”

• Complete front axle upgrade (birfields + shafts)
• Gun-drilled design allows internal greasing
• Built for extreme off-road and competition use
• Designed for vehicles running large tyres and high torque

Advanced Engineering

• Manufactured from 4340 chromoly steel
• Birfield housings are forged and precision-machined
• Dual heat-treated internal components
• Internal grease channel for easier maintenance
• M8 grease zerk fitting for direct lubrication
• Precision-polished surfaces reduce stress points

Technical Specifications

• Differential Side: 30 spline
• Birfield Side: 30 spline
• Material: 4340 chromoly steel
• Design: Gun-drilled, greaseable system
• Configuration: Complete axle + birfield super set

Performance Benefits

• Maximum strength under extreme load conditions
• Reduced maintenance time compared to standard setups
• Improved reliability for lifted and heavily modified vehicles
• Ideal for expedition, rock crawling and heavy-duty use

Vehicle Compatibility

• Toyota Land Cruiser 80 Series
• 1995-1997 Lexus LX 450
• Models equipped with a 30-spline front differential
• Suitable for diesel and petrol variants

** 1990-1993 models with short drive flanges will need to obtain the taller drive flanges (Toyota P/N 43421-60040) to be able to reuse the OEM grease caps.

What’s Included

• 2 × Gun-Drilled Chromoly Birfield Joints
• 2 × Chromoly Axle Shafts
• Grease fittings (installed)
• Required clips and hardware (as supplied)

Installation Notes

• Professional installation recommended
• Verify spline count before ordering (30-spline only)
• Minor clearancing of the knuckle may be required

FAQs

1) What makes this different from standard kits?
This version features a gun-drilled design with internal grease channels, allowing easier servicing.

2) Is this stronger than the 24-spline kit?
Yes. It is designed for later models and offers improved strength and serviceability.

3) Does this replace the full front axle?
Yes. It includes both birfields and axle shafts.

4) Is it suitable for large tyres?
Yes. Designed for high-load and off-road conditions.

5) How is it serviced?
Grease can be injected through the zerk fitting without full disassembly.

6) Does it require modification?
Some minor clearancing may be required depending on your setup.

Need just the axle?
Check the Short side or Long side version to complete your axle setup.

Looking for the 24 Spline kit?
Check the 24 Spline version.