Branik Legacy 1550 Inner Axle Shaft - 4340 or 300M - Custom Length

Branik Legacy 1550 Inner Axle Shaft - The Best Heavy-Duty Axles on the Planet

When only the absolute strongest will do, Branik Legacy 1550 inner axle shafts deliver unmatched strength and durability for the most extreme off-road applications. These are the same axle shafts trusted by Ultra4, WeRock, SRRS, and Pro Rock Racing champions—tested by the best, proven in the worst conditions imaginable.

Choose Your Material - 4340 Chromoly or 300M Steel

Branik Legacy 1550 inner axle shafts are available in two premium materials to match your application and budget:

4340 Chromoly - The Workhorse

• High-strength chromoly steel (4340 alloy)
• Excellent strength-to-weight ratio
• Superior ductility and impact resistance
• Proven in extreme off-road and racing applications
• Best value for most high-performance builds

300M Steel - The Ultimate

• Premium aerospace-grade alloy steel
• Higher tensile strength than 4340 chromoly
• Superior fatigue resistance for longer service life
• Better impact toughness to handle extreme shock loads
• The absolute strongest material available for axle shafts
• Reserved for the most extreme racing and rock bouncing applications

Both materials are precision heat-treated to exact specifications for maximum performance.

1550 Series - 30-35% Stronger Than 1480

The 1550 universal joint series represents a significant strength upgrade over standard 1480 axles. With larger u-joints and beefier shafts, Branik's 1550 axles deliver:

• 30-35% more strength than 1480 axles
• Larger diameter u-joint yokes for improved durability
• Greater articulation capability for extreme suspension travel
• Proven in competition at the highest levels of off-road racing

100% Machined In-House - Precision Matters

What sets Branik apart is their complete in-house manufacturing process. Every Legacy 1550 axle shaft is:

• Machined 100% at Branik's California facility
• Necked down to proper diameter for ultimate strength
• Precision heat-treated to exact specifications
• Ground and finished for perfect fitment
• Quality inspected before shipping

This level of control ensures every axle shaft meets Branik's exacting standards.

Custom Length - Built for Your Application

Branik manufactures these inner axle shafts to your exact specifications for multiple heavy-duty axle platforms. Whether you're building a custom housing or need specific measurements for your application, Branik can accommodate.

Critical: Minimum Tube ID Requirement

IMPORTANT: Your axle tube inside diameter (ID) MUST be a minimum of 2.625 inches to accommodate the 1550 series axle shaft. This is non-negotiable. Verify your tube ID before ordering.

Competition Proven - Podium Finishes

These aren't just expensive axle shafts—they're championship-winning components. Branik Legacy axles have been tested and proven in:

• Ultra4 Racing - King of the Hammers and national series
• WeRock Rock Crawling - Professional rock crawling competitions
• SRRS (Southern Rock Racing Series) - Extreme rock racing
• Pro Rock Racing - Elite-level competitive rock crawling

Multiple podium finishes and wins validate the strength and reliability of these axle shafts.

Wide Application Range - Multiple Axle Platforms

These inner axle shafts are designed for multiple heavy-duty axle applications:

Dana 60 Applications:

• 2005-up Ford Super Duty Dana 60 (front or rear)
• Chevy/Dodge Dana 60 (1975-1991 and later)
• Custom front Dana 60 builds
• Aftermarket Dana 60 housings

Dana 70 Applications:

• Custom Dana 70 builds
• Heavy-duty truck Dana 70 conversions

Dana 80 Applications:

• Custom Dana 80 builds
• Heavy-duty truck Dana 80 conversions

GM 14-Bolt Applications:

• GM 14-bolt full float rear axles
• Steering 14-bolt conversions
• Custom 14-bolt builds

Other Applications:

• Custom fabricated axle housings (2.625"+ tube ID)
• Aftermarket C's and knuckles (Reid Racing Super King Pin, Reject Fab, Crane Magnum, etc.)
• Steering 9-inch conversions
• Any custom heavy-duty application requiring 1550 strength

Spline Options Available

Branik can machine these inner shafts in various spline counts to match your differential:

• 30 spline - Standard Dana 60/70/80, 14-bolt
• 35 spline - Upgraded Dana 60/70/80, high-performance 14-bolt
• 40 spline - Maximum strength Dana 60/70/80, upgraded 14-bolt

Specify your required spline count when ordering.

Requires Branik Legacy 1550 U-Joints

These axle shafts require the matching Branik Legacy 1550 u-joints (sold separately). Do not use standard 1550 u-joints—Branik Legacy u-joints are specially designed with proper clearances, heat treatment, and strength for these applications.

Which Material Should You Choose?

Choose 4340 Chromoly if:

• Running 37-40" tires
• High-performance trail rig or weekend racer
• 300-500 HP applications
• Want the best strength-to-value ratio

Choose 300M Steel if:

• Running 42"+ tires
• Professional Ultra4 or rock racing competition
• 500+ HP applications
• Rock bouncing or extreme abuse
• Want the absolute strongest axle shaft available

Branik Motorsports - Championship Pedigree

Branik Motorsports has built its reputation manufacturing the strongest drivetrain components in the off-road industry. From Ultra4 champions to weekend warriors, Branik customers demand the best—and Branik delivers. Every component is precision-engineered, manufactured in-house in the USA, and backed by Branik's reputation for excellence.

Build It Right - Build It Once

Whether you choose 4340 chromoly or 300M steel, you're getting a premium axle shaft engineered and manufactured to withstand the most extreme conditions. These aren't budget components—they're professional-grade race parts that will outlast and outperform anything else on the market.

Order Your Custom Length Today

Contact us with your specifications:

• Material choice (4340 or 300M)
• Overall length required
• Spline count (30, 35, or 40)
• Application details (Dana 60, 70, 80, 14-bolt, etc.)
• Any special requirements

We'll work with you to ensure you get the exact axle shaft you need for your build.

KEY FEATURES:

✅ Choice of 4340 or 300M Steel – Match material to your application
✅ 1550 Series – 30-35% stronger than 1480 axles
✅ 100% Machined In-House – Branik California facility
✅ Ultra4 & WeRock Proven – Championship-winning strength
✅ Custom Length – Built to your exact specifications
✅ Precision Necked Down – Optimized for ultimate strength
✅ Heat Treated – Proper heat treatment for maximum durability
✅ Multiple Applications – Dana 60/70/80, 14-bolt, custom builds
✅ Multiple Spline Options – 30, 35, or 40 spline available
✅ Requires 2.625" Tube ID – Minimum axle tube inside diameter
✅ Made in USA – Branik Motorsports quality

TECHNICAL SPECIFICATIONS:

MATERIAL COMPARISON:

WHAT'S INCLUDED:

Per Axle Shaft:

• (1) Branik Legacy 1550 inner axle shaft
• Choice of 4340 chromoly or 300M steel
• Custom machined to your specified length
• Heat treated and ready to install