Longfield Chromoly Birfield & Axle Kit (24-Spline) – Toyota Land Cruiser 80 Series (301712-1-KIT)

Complete front axle upgrade for maximum strength and reliability. The Longfield Chromoly Birfield & Axle Kit (24-Spline) is designed for the Toyota Land Cruiser 80 Series, replacing both birfields and axle shafts with heavy-duty chromoly components.

This kit is ideal for early 80 Series models using 24-spline differentials, delivering a significant upgrade over factory components for off-road, overlanding and high-load applications.

Why Choose a Complete Axle Kit?

• Replaces both birfields and the axle shafts in one upgrade
• Eliminates weak OEM components
• Improves drivetrain reliability under extreme load
• Ideal for larger tyres and aggressive off-road use

Construction & Engineering

• Manufactured from high-strength chromoly steel
• Birfield housings made from forged chromoly
• Internal components are dual heat-treated for durability
• Precision-polished surfaces reduce stress risers
• Designed for maximum strength and longevity

Technical Specifications

• Differential Side: 24 spline
• Birfield Side: 30 spline
• Material: Chromoly steel
• Configuration: Complete axle + birfield kit

Performance Benefits

• Increased resistance to breakage under load
• Improved reliability in extreme off-road conditions
• Better suited for lifted and modified vehicles
• Reduced maintenance compared to worn OEM components

Vehicle Compatibility

• Toyota Land Cruiser 80 Series 
• 1995-1997 Lexus LX 450
• Early models with a 24-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 × Chromoly Birfield Joints
• 2 × Chromoly Axle Shafts
• Pre-installed clips and fittings (as supplied)

Installation Notes

• Professional installation recommended
• Verify spline count before ordering (24-spline only)
• May require minor clearance depending on setup

FAQs

1) Is this for all Land Cruiser 80 models?
No. This kit is specifically for early models with 24-spline differentials.

2) How do I know if I have a 24-spline?
You must confirm your differential specification before ordering.

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

4) Is this stronger than OEM?
Yes. Chromoly construction significantly increases strength and durability.

5) Is it suitable for large tyres?
Yes. Ideal for vehicles running oversized tyres and increased load.

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 30 Spline kit?
Check the 30 Spline version.