Rialto, CA (October 17, 2023) — Pioneering automotive brand, Speedmaster^®, is set to redefine strength and performance with the unveiling of their new Ford 9 inch / 4 inch Bore, 40 Spline Spool HD Pro Third Member Assembly that delivers more horsepower to the ground. Manufactured with A356-T6 aluminum, this heavy-duty case accommodates 28, 31, 35, and 40-spline carriers and spools with proven durability for extreme applications.

Why This Stands Out:

The 4 inch, 40 spline design represents the zenith of durability in the world of high-performance differentials and includes an aluminum through-bolt design, forged chromoly steel spool, 1350 series yoke, Daytona pinion support, and gear ratio with a carrier bearing diameter of 4 inches. 

While the traditional Ford 9 inch / 3.25 inch bore variants have earned their reputation in the industry, this enhanced assembly is designed for even more power, torque, and reliability.

Product Overview:

●     Part Number:1-215-014

●     Retail Price: US $1,800.00

●     Case Material: Premium A356-T6 aluminum, fortified with one-piece billet bearing caps and a through-bolt design.

Key Highlights:

●     Superior Strength: The 4 inch, 40 spline configuration provides an unparalleled combination of strength and reliability, catering to enthusiasts and racers pushing their vehicles to the very edge.

●     Precision Gear Sets: Made from high-performance 8620 Chrome-Nickel-Moly Steel, these gear sets ensure longevity and peak performance in even the most demanding scenarios.

●     Optimal Traction: The CNC-machined spool, made from forged chromoly steel, ensures synchronized axle movement, maximizing traction and minimizing gear failure risks.

Speedmaster’s dedication to producing components that not only meet but exceed industry standards is evident in every facet of this assembly. From the meticulously crafted case to the precision-engineered yoke, it's clear that this third-member assembly provides value and upgraded performance.

For best results, Speedmaster recommends a mineral-based gear oil that meets or exceeds EP 140 for extreme pressure applications and avoids split grades to guarantee optimal gear health.

For more information about Speedmaster’s Ford 9 inch / 4 inch bore, 40 Spline Spool HD Pro Third Member Assembly, visit Speedmaster at one of two locations at the 2023 SEMA Show. Speedmaster’s outside booth is located at 22753 in the Silver Lot, or in the Racing and Performance in the Central Hall at booth #81020.

For more information visit speedmaster79.com, email info@speedmaster79.com, or call (909) 605-1123. For more information about Speedmaster, view this video.

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About Speedmaster^®

In 1979, the company was founded with Pete's Performance, which was a small speed workshop. It began by building engines for customers as a hobby, and it has now grown to include selling, assembling, manufacturing, and racing high-performance engine parts. Over the years, the company has grown into a worldwide high-performance powerhouse. Growing from a one-man bricks-and-mortar business; to now a supply chain that entails more than 400+ people across the world. Today, Pete's Performance has evolved into the internationally known Speedmaster^® which has distribution centers and offices in Sydney, Los Angeles, and Shanghai.