Longfield Chromoly Birfield & Axle Kit – Nissan Patrol Y61 (30-Spline / 31-Spline) (300809-KIT)

Built to handle extreme loads and aggressive driving. The Longfield Chromoly Birfield & Axle Kit for the Nissan Patrol Y61 (1997–2013) significantly increases front axle strength for off-road and heavy-duty applications.

Using forged 4340 chromoly steel and advanced heat-treatment processes, this kit delivers superior durability compared to standard OEM components, making it ideal for vehicles running larger tyres and higher torque loads.

Performance Advantages

• Designed for high-torque and extreme off-road conditions
• Handles large tyre setups (35″–37″+)
• Reduces the risk of CV and stub shaft failure
• Suitable for touring, rock crawling and competition use

Engineering Highlights

• Gun-drilled internal design allows grease to flow through the birfield
• Integrated M8 grease fitting (zerk) for easy servicing
• Machined Spline Saver reduces stress at critical spline areas
• Precision-polished surfaces minimise stress risers

Construction Details

• Birfield housing is manufactured from forged 4340 chromoly
• Internal components are dual heat-treated for strength and longevity
• Axle shafts produced from 4340 chromoly steel
• Designed for demanding off-road environments

Technical Specifications

• Birfield Spline: 30 spline
• Differential Side Spline: 31 spline
• Material: 4340 chromoly steel
• Serviceability: Greaseable via zerk fitting

Vehicle Compatibility

• Nissan Patrol Y61 / GR / GU – 1997–2013
• Nissan Safari – 1997–2004
• Nissan Patrol Super Safari – 1997–2013
• All engine variants

What’s Included

• 2 × Chromoly Birfield Joints
• 2 × Chromoly Front Axle Shafts
• Pre-installed grease fittings

Installation Notes

• Professional installation recommended
• Some minor knuckleball clearancing may be required
• Regular greasing is recommended for long-term performance

Warranty

• 12-month limited warranty
• Covers manufacturing defects under normal use
• Excludes labour and installation costs

FAQs

1) Are these suitable for heavy builds?
Yes. They are designed for vehicles running large tyres and increased weight.

2) Do they require frequent maintenance?
No disassembly is required thanks to the built-in grease fitting.

3) Are they stronger than OEM components?
Yes. Chromoly construction and heat treatment provide a significant strength upgrade.

4) Will they fit all Y61 models?
Yes. They are compatible with all Patrol Y61 variants.

5) Is modification required?
Minor knuckle clearancing may be required, depending on setup.

6) Are they suitable for competition?
Yes. They are designed for extreme off-road use.

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

Looking for the Birdfield Joint kit?
Check the Birdfield Joint kit.