TRAIL GEAR 303708-1 Birfield Spline 012433017524

( Brand: Trail Gear ), ( Manufacturer Part Number: 303708-1 ), ( UPC: 012433017524 )

Review TRAIL GEAR Birfield 30 Spline fits FJ80

Trail Gear 303708-1 Birfield 30 Spline Differential Upgrade Kit for Toyota FJ80

The Trail Gear 303708-1 Birfield 30 Spline Differential Upgrade Kit is an excellent choice for Toyota FJ80 owners seeking enhanced durability, performance, and off-road capability for their vehicle. This top-tier aftermarket component is meticulously engineered to replace the stock differential and provide significant improvements in various aspects.

At the heart of this upgrade kit lies the robust Birfield 30 Spline differential. The 30 spline design offers a substantial increase in strength compared to the standard 18 spline unit. This enhanced durability is crucial for off-road applications, where increased torque and heavy loads are common. The Birfield design ensures excellent rigidity and minimizes the opportunity for differential damage.

One of the most notable advantages of the Trail Gear 303708-1 kit is its improved sealing system. This kit comes with a set of high-quality, precision-machined seals that provide an exceptional seal against the elements, preventing oil leaks and ensuring optimal differential performance. The new seals also offer better protection against damage caused by rocks or other debris, ensuring a longer lifespan for the differential.

The Trail Gear 303708-1 Birfield 30 Spline Differential Upgrade Kit also includes an upgraded pinion yoke and adapter kit. These components are designed to provide a secure connection between the differential and the transmission, minimizing the risk of failure or damage during off-road use. The upgraded yoke and adapter are precision-machined to ensure perfect fitment and optimal performance.

Another crucial feature of this upgrade kit is its compatibility with various locking differentials, such as the Toyota ARB Air Locker or the Detroit TrueTrac. These optional add-ons provide additional traction and control, making the Trail Gear 303708-1 kit an excellent choice for serious off-road enthusiasts.

In summary, the Trail Gear 303708-1 Birfield 30 Spline Differential Upgrade Kit is an essential upgrade for Toyota FJ80 owners seeking superior off-road performance, durability, and reliability. With its robust Birfield 30 Spline differential, improved sealing system, upgraded pinion yoke and adapter kit, and compatibility with various locking differentials, this kit offers a comprehensive solution for enhancing the capabilities of your FJ80.

The Birfield 30 Spline Trailing Arm Assembly (Part No. TRG303708-1) is a critical component in the suspension system of Toyota FJ80 vehicles. This part connects the wheel hub to the chassis and plays a crucial role in transmitting torque to the wheels. Here are some pros and cons of buying this trailing arm assembly:

1. Improved Durability: The Birfield 30 Spline design is stronger than the original OEM trailing arm assembly. This makes it more durable and capable of handling heavier loads and off-road conditions.

2. Better Performance: The stronger design of the Birfield 30 Spline trailing arm assembly allows for improved handling, better stability, and increased traction, especially during off-road driving.

3. Reduced Maintenance: The stronger design of the Birfield 30 Spline trailing arm assembly also means less maintenance is required, as it is less prone to failure compared to the original OEM part.

4. High-Quality Material: The Birfield 30 Spline trailing arm assembly is made of high-quality materials, ensuring a long-lasting and reliable component for your Toyota FJ80.

1. Cost: The Birfield 30 Spline trailing arm assembly is more expensive than the original OEM part. This may be a deterrent for some buyers who are looking for a more budget-friendly option.

2. Installation: The installation process of the Birfield 30 Spline trailing arm assembly can be more complex than the original OEM part due to its stronger design. It may require specialized tools and expertise to install correctly.

3. Weight: The Birfield 30 Spline trailing arm assembly is heavier than the original OEM part, which can affect the overall weight and fuel efficiency of the vehicle.

In conclusion, the Birfield 30 Spline Trailing Arm Assembly (Part No. TRG303708-1) is a high-performance and durable upgrade for Toyota FJ80 vehicles. It offers improved durability, better performance, reduced maintenance, and high-quality materials. However, it comes with a higher cost, a more complex installation process, and increased weight.

If you are an off-road enthusiast, a heavy-duty user, or someone who values the improved performance and durability of the Birfield 30 Spline trailing arm assembly, then this upgrade is definitely worth the investment. However, if you are on a tight budget or prefer a more straightforward installation process, then the original OEM part may be a better option for you.

Details:

American Express.

part #: 3037081 price

• $349.99

specifications axlpar:

• for models: Fj80
• brand: Trail Gear
• mpn: 303708-1
• upc: 012433017524

payments axlpar:

• other
• wallet: Paypal
• credit card: Mastercard

general axlpar:

• condition: New
• Car Truck Parts Accessories > Transmission Drivetrain > Axle Housings Parts

returns axlpar:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

shipping axlpar:

• type: Fixed
• class: Standard
• transit: 4-8 Days
• service: Standard
• cost: $0.00

seller axlpar:

• city: , Ohio
• # reviews: 626064
• rating: 99.4%

offer axlpar:

• started: April 20, 2026
• availability: In Stock
• options: Ship-to-home
• quantity: 1
• sold: 0

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